Proper Pipetting is an inevitable part of experiments or research conducted under microbiology, biochemistry, and pharmacology-like fields of biology.
Different pipettes are available for various purposes with differing levels of accuracy which are Transfer Pipette, Graduated Pipette, and Single-Channel Pipette.
The equipment is designed to transport a measured volume of liquid with utmost precision. Different pipettes are available for various purposes with differing levels of accuracy. Pipette is a laboratory equipment commonly used in research or lab purposes in various fields of science. Transfer Pipette is considered one of the most basic types of pipette. This is a disposable pipette generally made of plastic generally used for rough measurements. This cannot be used for precise measurements. Graduated pipettes are classified under micropipettes. This is mainly made of long glass tubes. This contains a series of graduations to indicate different calibrated measurements. For measurements using graduated pipettes, we use additional equipment like rubber bulbs at the top of the equipment. This is a non-disposable type instrument that operates by piston-driven air displacement. Single-Channel Pipettes are of the adjustable type that delivers a measured volume of liquid. Also, these pipettes require disposable plastic tips. Many follow mouth piping instead of using rubber bulbs. This must not be appreciated. You should use new rubber bulbs or plastic suction livers for sucking the liquid into the pipette. Overfilling of pipettes using misuse of rubber bulbs may lead to undesirable effects. A lack of attention may lead to the overfilling of the pipette and overflow of the solution. The application of overpressure on pipettes or lack of attention may result in the breakage of glass pipettes and this may cause injuries to your body parts if you're handling it carelessly. Sequential calibration is essential while using an air-displacement pipette.
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Correctly label the following anatomical features of the coxal joint ransvelse ecetabular Iigameni Pubolemoral ligament Femur Ischlal luberosily Gieater trochantet Round gament otenoral Iduuen (d) Postarlor vlow
The connection between bones, ossicles, or other hard body parts that makes up an animal's skeletal system into a useful whole is known as a joint, sometimes known as an articulation (or articular surface). They are made to accommodate different sorts and gradations of movement.
The joint that joins the head of the femur to the pelvic acetabulum is the hip joint, also referred to as the acetabulofemoral joint (art. coxae). Its main job is to carry the body's weight in both static (like when you're standing) and dynamic (like when you're walking or running) postures.
By articulating the pelvis and femur, the hip joint connects the axial skeleton to the lower extremity. The os coxae, often known as the hip bone, develops from the By the conclusion of adolescence, the ilium, ischium, and pubis fuse to form the adult os coxae, or hip bone.
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In pea plants, purple flowers are dominant and white flowers are recessive. To purple flower pea plants are crossed and produce 10 offspring. Seven of the offspring have purple flowers and three of the offspring have white flowers. Based on the offspring produced, what must be the genotypes of the purple flower parent plants?
The genotype of the purple flower parent plants would be heterozygous
Monohybrid crossingLet us assume that the dominant purple allele is A while the recessive white allele is a.
Two purple flowers were crossed to produce 10 offspring out of which 7 had purple flowers and 3 had white flowers. In other words, there is no chance that the two parents are homozygous purple.
In order to have a chance of producing white flower offspring, both purple flower parents must be heterozygous, Aa.
Crossing Aa and Aa:
Aa x Aa
AA Aa Aa aa
Phenotype ratio = 3 purple flower: 1 white flower
Even though the produced phenotype ratio in real life is 7:3, this is probably due to the limited population of offspring produced.
In other words, the two parents are heterozygous.
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natural selection alters the likelihood of an organism passing on its genes to subsequent generations. the evolutionary effects of natural selection are only apparent when looking at an entire population over time. select the reasons why evolutionary effects of natural selection are only apparent when looking at populations. selection changes the natural variance of phenotypes. during their lifetime, individuals become adapted to their environments. the accumulation of beneficial alleles requires multiple generations. phenotypes with an underlying genetic component are inherited. only beneficial traits are passed on to the next generation.
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What is the chromosome composition of a normal human male? 44 autosomes; 1 X chromosome, and 1 Y chromosome 46 autosomes; 1 X chromosome; and 1 Ychromosome 22 autosomes and 2 Y chromosomes 44 autosomes and 2 Y FHronlasoinesh
A normal human male has 44 autosomes, 1 X chromosome and 1 Y chromosome.
What are chromosomes?
Each cell's nucleus contains chromosomes, which are structures that resemble threads and contain the DNA molecule. Each chromosome is constructed from DNA that has been tightly wound around proteins called histones numerous times to support its structure.When a cell is not dividing, chromosomes cannot be seen in the nucleus, not even under a microscope. However, during cell division, the DNA that makes up chromosomes gets more compactly packed and becomes visible under a microscope. The majority of what scientists understand about chromosomes comes from studying them during cell division.Normal chromosomes:
Humans typically have 46 chromosomes, or 23 pairs of them, in each cell. The appearance of twenty-two of these pairs, known as autosomes, is the same in both sexes. Males and females have different 23rd pair sex chromosomes. Males have one X and one Y chromosome, while females have two copies of the X chromosome.
Hence A normal human male has 44 autosomes, 1 X chromosome and 1 Y chromosome.
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what is the cupula? multiple choice question. a gelatinous cap surrounding the stereocilia and kinocilium of the hair cells a mound of hair cells within the ampulla a patch of hair cells located on the wall of the saccule a dilated sac at one end of the semicircular canal
cupula (plural cupulas or cupulae) (plural cupulas or cupulae) a dome- or cup-shaped item. (anatomy) A movable component that senses head rotation in the semicircular canals of the ampullae of the ear.
All living things keep an eye on their surroundings, and gravity and how the body is positioned in relation to it are significant elements of that environment. Additionally, creatures that move through locomotion must be able to change their orientation in response to their own movements as well as external pressures. These crucial functions are carried out by the vestibular system. It activates a number of reflex pathways that are in charge of compensatory movements and postural adjustments. In order to provide perceptions of gravity and movement, it also activates neural pathways that lead to the cupula . The Chapter's first section begins with a description of the peripheral sensory apparatus and explains how specialized receptors transduce information.
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At a distance of 6 meters, a person with average vision is able to clearly read letters 1.0 cm high.
Approximately how large do the letters appear on the retina? (Assume that the retina is 1.7 cm from the lens.)
The image of letters that appear on retina will be of height 0.00283 m and will be inverted.
What does the term "magnification" mean and how it is calculated?Magnification is the process of visually enlarging an object, not physically increasing its size but only increasing its apparent size.The ratio of the image's height to the object's height is represented by the formula for magnification. Additionally, the letter "m" stands for the object's magnification. Additionally, its formula is Magnification (m) is equal to h/h'. Here, the object's height is represented by h and its height by h'.
How to calculate and form equations?It is given in the question that,
Object separation, u = 6 meters
Lens distance from retina is v = 1.7 cm = 0.017 m.
Height of the object: hu = 1.0 m
here, magnification = [tex]-\frac{v}{u}[/tex] = [tex]\frac{hv}{hu}[/tex]
now, -[tex]\frac{o.o17}{6}[/tex] = [tex]\frac{hv}{1}[/tex]
[tex]hv = \frac{-0.017}{6}[/tex]
[tex]hv = -0.002833m[/tex]
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___________ are where molten magma rises to just underneath the surface of Earth, creating a bulge or volcanic activity
Because of the high pressure inside the earth, molten magma rises to just beneath the earth's surface, creating a bulge or volcanic activity as the lava comes out of the earth.
What is the lava?When there is high pressure and temperature inside the earth, it is expelled in the form of lava. A volcanic eruption occurs, and the lava has a high temperature and can spread from the origin to several miles, depending upon the eruption.
Hence, because of the high pressure inside the earth, molten magma rises to just beneath the earth's surface, creating a bulge or volcanic activity as the lava comes out of the earth.
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contractions of the papillary muscles:____.
a. prevent the av from reversing into the atria
b. close the semilunar valves.
c. close the atrioventricular valves.
d. eject blood from the atria into the ventricles.
e. eject blood from the ventricles.
Blood is ejected from the atria into the ventricles by contractions of the papillary muscles, which also stop the atrioventricular valves from leaking into the atria.
What effect do the papillary muscles have when they contract?When the myocardia contracts, the papillary muscles, which resemble "nipples," contract as well. By pulling on the chordae tendinae, they prevent the AV valves from prolapsing. Both the left and right ventricles contain the papillary muscles and chordae tendinae.
What stops the reverse movement of AV valves into the atria?The chordae tendinae that connect the leaflets of the atrioventricular valves to the papillary muscles within the walls of the ventricle act as anchors to keep the valves from inverting.
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_______ run through the thalamus to the primary somatosensory cortex.
a.Chemoreceptors
b. Olfactory receptors
c. Thermoreceptors
According to the research, the correct answer is Option C. Thermoreceptors run through the thalamus to the primary somatosensory cortex.
What are Thermoreceptors?It is a receptor that is stimulated by temperature changes, found in the dermis, in its superficial portion, adjacent to the epidermis.
In this sense, they detect thermal stimuli where the temperature is regulated by the hypothalamus at the level of the central nervous system, this goes through the somatosensory system that produces the modality of the temperature stimulus.
Therefore, we can conclude that according to the research, Thermoreceptors act upon the sensation of heat and at times when the temperature has decreased and run up to the primary somatosensory cortex.
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the absorbance spectrum below is that of the major pigment from a certain organism found on earth. based on what you know about absorbance, what color would this organism be?
Absorb blue (400–500 nm) with red color whenever the absorbance level of spectrum is that major with pigment from a organism found on the earth.
The existence or absence of particular absorption characteristics on the surface, as well as their location and form, all affect the spectral reflectance signatures. For photosynthesis, chlorophyll pigments a and b preferentially absorb blue (400–500 nm) and red (600–700 nm) wavelengths. The "green" wavelengths (500–600 nm) experience less absorption, giving off the lush green color of healthy flora. Carotene, a yellow to orange-red pigment, strongly absorbs blue wavelengths (400–500 nm).
The red and blue pigment xanthophyll, which gives deciduous leaves their varied hues, absorbs heavily in the 400–500 nm region. While leaf absorption is minimal, leaf pigments and cellulose are transparent to near-infrared wavelengths (700–1300 nm). Depending on the structural properties of the leaf, the majority of the energy is transmitted and reflected, creating a high near-infrared (NIR) plateau. The red edge, which is used to identify plant stress, is the abrupt rise in reflectance between the red and NIR areas. The soil and leaf water absorption dominates the middle-infrared (MIR) region (1300-2500 nm), especially between 1400 and 1900 nm, with reflectance rising as leaf liquid water content falls.
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which are indications of dehydration? select one: a. tachycardia and weight loss b. polyuria and hyperventilation c. muscle weakness and decreased deep tendon reflexes d. decreased hemoglobin and hematocrit
When you use or lose more fluid than you consume, your body becomes dehydrated because it lacks the water and other fluids it needs to function normally. Dehydration will occur if lost fluids are not replaced.
Dehydration can affect everyone, but it is particularly dangerous for small children and elderly people.
Dehydration in young children is most frequently brought on by severe diarrhea and vomiting. Older people naturally have less water in their systems and may have diseases or take medications that make them more susceptible to dehydration.
Age might also affect dehydration symptoms and indicators.
newborn or little child
Dry tongue and mouthAbsence of sobbing tearsFor three hours, no wet diapersreduced cheekbones and eyesSkull's top soft spot is recessed.Vacillation or irritabilityAdult
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1.Explain the anatomical concepts associated with nutrition structural foundations.
2.Explain the physiological concepts associated with nutrition and metabolic functional foundations.
The macronutrients (carbohydrate, protein, and fat) and vitamins are among the organic nutrients. Carbon and hydrogen are both present in organic nutrients.
What forms the basis of a healthy diet?The basis for optimal health is eating a diet high in plant-based foods (whole grains, fruits, and vegetables), moderate amounts of lean meats and animal substitutes, and low-fat dairy, while avoiding meals high in added sugar, salt, saturated fat, and alcohol.
What three different structural shapes are there?Mass structures, frame structures, and shell structures are the three ways to arrange materials to support a weight or to contain and protect something.
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what best explains the necessity for protein digesting enzymes to be secreted by the pancreas in their inactive form?
Inactive protein-digesting enzymes are released in order to shield the organs and glands from the enzymes' digestion.
They begin digesting the glands that contain them and the location where they are discharged if they are released in the active form. Inactive forms of enzymes are also secreted in order to control their appropriate operation. When necessary, it is activated after being first released in an inactive state and reaching the target organ.
An enzyme's inactive precursor is known as a zymogen or a protein enzyme. The precursor enzyme must have a certain portion cleaved in order for it to be activated; otherwise, the enzyme would always be inactive. The biochemical changes often take place in Golgi bodies. In the case of the pancreas, zymogens are secreted in part to stop the enzymes from breaking down proteins.
Hence, inactivated enzyme are activated by certain factor.
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Joint movement when you twist head side to side:
Answer:
The atlantoaxial pivot joint provides side-to-side rotation of the head, while the proximal radioulnar articulation allows for rotation of the radius during pronation and supination of the forearm.
Explanation:
Rotation can be toward the midline of the body, which is referred to as medial rotation, or away from the midline of the body, which is referred to as lateral rotation. Movement of the head from side to side is an example of rotation.
I need help now.
What is the group of a periodic table? please help me.
Answer:
In the periodic table, a group (also known as a family) is a vertical column of elements that share common characteristics. The elements in each group have similar chemical properties because they have the same number of valence electrons (the electrons in the outermost energy level of an atom). The number of valence electrons determines the element's reactivity and its ability to form chemical bonds. There are 18 main groups in the periodic table, and they are numbered from 1 to 18. The elements in Group 1 are known as the alkali metals, while the elements in Group 2 are known as the alkaline earth metals. The elements in Groups 3 through 12 are known as the transition metals, while the elements in Groups 13 through 18 are known as the post-transition metals. The elements in each group are listed in order of increasing atomic number.
is a 12-minute hand scrub enough time to remove all transient and resident microbes from the skin ?
The goal of the surgical hand scrub is to eliminate debris and transient bacteria from the hands, forearms, and nails while reducing resident microbes.
At what point in lab safety should hands be washed?Every time your hands have come into touch with potential risks, including before and after lab exercises, you should wash your hands.
Before beginning lab work, when should hands be washed?Fire extinguishers, emergency showers, and eye wash stations are only necessary in laboratories with a BSL of 3 or higher. What biosafety level is assigned to organisms that don't typically infect people with disease? To prevent personal contamination, hand washing should only be done once, right before labs.
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Which of the following distinguishes a possible effect of the efforts of international NGOs operating in the agricultural sector?
Responses:
greater need for American food exports internationally
less need for international aid programs
greater need for domestic private sector research programs
less need for plant scientists worldwide
The possible effects of the international NGOs is that there would be greater need for American food exports internationally. Option A.
What is an international NGO?An organization that operates independently of the government and broadens the definition of an NGO to include the entire world is known as an international non-governmental organization (INGO).
Numerous sizable international NGOs are transnational federations of national organizations, including Amnesty International, the International Federation of Red Cross and Red Crescent Societies, Oxfam International, CARE, Save the Children, and the World Wildlife Fund.
INGOs have a wide range of responsibilities, including agenda-setting, advocacy, lobbying, public education, social and economic development, and monitoring other international actors. These behaviors are categorized by some researchers as "identifying, framing, blaming, and shaming."
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Answer: less need for international aid programs
Explanation: I just did the assignment
the nasal mucosa performs all of the following functions except __________.
Other than resisting abrasion, the nasal mucosa filters, humidifies, and warms the air that is breathed.
The nasal cavity is lined by nasal mucosa. It is a component of the mucous membrane that lines the respiratory tract, the respiratory mucosa. The periosteum or perichondrium of the nasal conchae is closely attached to the nasal mucosa. It is connected to the skin through the nostrils and to the nasal section of the pharynx's mucous membrane through the choanae. Respiratory mucosa, also known as nasal mucosa, lines the surfaces of the turbinate bones (also known as nasal conchae) and meatuses inside the nasal cavity. Epistaxis, or bleeding from the nose, is brought on by injury to the nasal mucosa's blood vessels. The majority of times, epistaxis is self-limiting; yet, there.
Complete question:
The nasal mucosa performs all of the following functions EXCEPT __________.
a) filter the air
b) humidify the inhaled air
c) warm the inhaled air
d) resist abrasion
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a phylogenetic tree showing the relationships among ten phyla of bilaterian animals is shown below.
The members of the phylum are coelomates (C), pseudocoelomates (P), or acoelomates (A) hence the labeling is as follows A, P, C, C, C, C, P, C, C, C.
A phylogenetic tree is a branching diagram or a tree showing the evolutionary relationships among various biological species or other entities based on similarities and differences in their physical or genetic characteristics. All life on Earth is part of a single phylogenetic tree, indicating common ancestry. As dynamic hypotheses of genealogy and character change, phylogenetic trees can be used both to describe and understand character evolution and, as devices, to predict what we do not yet know.
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what general pattern has been found in the relationship between genome size and an organism’s phenotype?
Genomes of prokaryotes are less extensive than those of eukaryotes. Because they have more genetic material, the majority of eukaryotes have larger genomes than other eukaryotes.
What is a genome, exactly?The entire genetic makeup of an organism is referred to as its "genome." It includes every genetic instruction found in a cell. The nucleus of the cell houses the chromosomes that make up the genome.
What are eukaryotes and prokaryotes?Organisms called eukaryotes have arranged nuclei in each of their cells. All animals, all plants, all fungi, and several single-celled organisms are considered to be eukaryotes. One of the three categories of life, the Eukaryota or Eukarya group of organisms, includes them. Prokaryotes lack a structured nucleus and genetic material. They consist of simple creatures like bacteria.
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The given question is incomplete
The complete question is:
what general pattern has been found in the relationship between genome size and an organism’s phenotype?
Animals have larger genomes than plantsBody size increases with genome sizeAll of the listed responses are correctEukaryotes have larger genomes than prokaryotesthere are 24 species of hornbills that live in africa, all descended from a common ancestor. there are differences in nesting behavior, feeding morphology, and the habitats in which they are found, which include forests, woodlands, and savannahs. which statement best reflects how ecology and competition could have played a role in diversification of the hornbill lineages? please choose the correct answer from the following choices, and then select the submit answer button. answer choices resource partitioning may have occurred between different groups, resulting in competitive exclusion and speciation during the evolutionary history of hornbills. resource partitioning could have provided a selective force resulting in multiple speciation events over the evolutionary history of hornbills. competitive exclusion due to interspecific competition may have occurred between different groups, resulting in speciation during the evolutionary history of hornbills. competitive exclusion could have provided a selective force resulting in multiple speciation events over the evolutionary history of hornbills.
Resource partitioning may have occurred between different groups, resulting in competitive exclusion and speciation during the evolutionary history of hornbills. thus correct option (A)
Several species of birds have huge, horn-like bills, and these birds are known as hornbills. There are 54 species of hornbill, with 31 species found in Asia and 23 in Africa, predominantly in tropical rain forests and savannahs. East of the Wallace Line, just four species are present. About 15 million years ago, hornbills first emerged in the fossil record. They appear in several tribes' mythologies from Southeast Asia and Indonesia. The hill tribes of Borneo believe that rhinoceros hornbills carry souls to the afterlife. Every five to seven years, hornbills are celebrated in western Borneo. They serve as faithfulness symbols on Sumba.Hornbills are found only in the Old World. Toucans are regarded as their New World equivalent. The largest hornbill are the size of turkeys. The smallest is the size of doves. Many large ones have horn-like casques on their bill. Some bird live as long as 45 years.As a result of deforestation, habitat loss, and poaching for their bills, feathers, and flesh, several hornbill species are endangered or threatened. Some people have died after ingesting poisons placed out for animals. Others are kidnapped by poachers, who may fetch up to $1,000 per chick for the eggs of certain species.To learn more about hornbill visit:
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starting with the cecum and ending with the anus, name all parts of the large intestine in order. how does the large intestine convert liquid waste from the small intestine into solid waste to be stored then eliminated from the body?
Large intestine starts with cecum, then ascending colon, transverse colon, descending colon, sigmoid colon, rectum. Large intestine convert liquid waste into solid waste by absorbing water from it.
Large intestine continues with the small intestine through an ileocecal valve, then it moves upwards in abdomen which is called ascending colon, then it moves transversely in the abdomen which is called transverse colon then it moves downward which is called descending colon then it connects to rectum . Waste that reaches ascending colon will be in liquid form then waste will be converted to solid form as it moves through the Large intestine. Feces will be stored in rectum until it gets defecated.
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Peristalsis is characteristic of smooth muscle.
Yes, peristalsis is a contraction and relaxation of smooth muscle fibers in the walls of the digestive tract that helps push food and liquid through the body.
The Role of Smooth Muscle in PeristalsisPeristalsis is a vital process that helps us to digest our food. It is a wave-like motion of contraction and relaxation of smooth muscle fibers in the walls of the digestive tract. The process begins in the esophagus, where the muscles contract in a circular motion to move food downward.
As the food moves further down the digestive tract, the muscles relax and contract in a sequential pattern to push the food through the digestive system. The process is regulated by the autonomic nervous system, and it continues until the food has been digested and absorbed into the body. Peristalsis is an important process that helps us to stay healthy and nourished!
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which of the following may represent the sequence of one strand of a dna palindrome recognized by a restriction enzyme?
5' ATGGAT 3'
5' ATGATG 3'
5' ATGGTA 3'
5' ATGCAT 3'
To produce reproducible fragments and unique gel electrophoresis, these enzymes break DNA at set places relative to their recognition sequence.
What series constitutes a palindrome?When the sequences reading 5' (five-prime) to 3' (three prime) forward on one strand match the sequences reading 3' to 5' on the complementary strand with which it forms a double helix, they are said to be palindromic.
A DNA sequence: what is it?Finding the nucleotide sequences of DNA molecules is a skill called DNA sequencing. Name at least two available techniques for DNA sequencing. One technique of sequencing is by hand. chemical sequencing using maxam-gilbert and sanger chain termination.
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g which of the following antibiotics is recommended for use against gram-negative bacteria? a) polyenes b) bacitracin c) cephalosporin d) penicillin e) polymyxin
For usage against gram-negative bacteria, penicillin medicines are advised.
What antibiotic is used to treat both gram-positive and gram-negative bacteria?Broad-spectrum medications that work against both gram-positive and gram-negative pathogens include penicillin, tetracycline, and erythromycin. Klebsiella, Acinetobacter, Pseudomonas aeruginosa, and E are among the organisms that can cause gram-negative infections. E. coli and numerous more, less frequent germs
Which type of antibiotics is used to treat severe gram-negative infections as well as infections with Mycobacterium tuberculosis?The first aminoglycoside antibiotic, streptomycin, was first isolated from the bacteria Streptomyces griseus. It now primarily functions as a component of a multi-drug regimen used to treat pulmonary tuberculosis. It also has additional efficacy against a number of gram-negative aerobic bacteria.
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drag the labels onto the diagram to identify the stages in which the lagging strand is synthesized.
1. DNA polymerase begins synthesizing the lagging strand by adding nucleotides to a short segment of RNA.
2. After each piece of the lagging stand is complete, it is released from DNA polymerase.
3. A different DNA polymerase replaces the RNA segments with DNA.
4. DNA ligase seals the gaps between the pieces, and eventually forms continuous strand.
How are lag strands produced?
Instead of being formed as continuous duplex DNA, lagging strands are instead created as isolated, small DNA fragments known as "Okazaki fragments." In order to create an Okazaki fragment, a primer comprised of RNA-DNA needs to be produced by polymerase (Pol) -primase.
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if a segment of one side of a dna molecule has 500 adenine bases, how many thymine bases does the other side have? question 3 options: 0 you can't tell from this data. 250 500
The other side will have 500 thymine bases.
One of the four nucleotide bases of DNA, along with adenine (A), cytosine (C), and guanine, is thymine (T) (G). Thymine nucleotides on one strand of a double-stranded DNA molecule couple with adenine bases on the other strand. DNA and its information is encoded by the order of nucleotide bases.
Adenine (A), thymine (T), and cytosine (C), two nitrogen-containing bases, couple together in typical circumstances. By binding these pairs together, the structure of DNA is created.
Thymine is a pyrimidine nucleobase, also referred to as 5-methyluracil. Thymine is swapped out for the nucleobase uracil in RNA. Albrecht Kossel and Albert Neumann isolated thymine for the first time from calf thymus glands in 1893, hence its name.
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Articulates with hip bones of the pelvis?
The femur articulates with the hip bones of the pelvis.
When it comes to tetrapod animals, the femur, often known as the thigh bone, is the proximal bone of the hindlimb. The posterior section of the femur articulates with the tibia and patella to form the knee joint, while the top of the femur articulates with the acetabulum in the pelvis to produce the hip joint. Together, these three bones come together to form the knee joint. When compared to the other bones in the body, the femurs, both left and right, are considered to be the most robust. They are also the largest and most robust bones in humans.
The complete question is;
What bone articulates with the hip bones of the pelvis?
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Which of the following is regulated by the gland indicated by the red arrow? O blood glucose concentration Oblood calcium concentration body's reaction to stress Oblood pressure Submit Previous Answers Request Answer
The gland indicated by red arrow is parathyroid galnd and is responsible for blood calcium concentration .
Two pairs of tiny, oval-shaped glands make up the parathyroid glands. They are situated in the neck close to the two lobes of the thyroid gland. Typically, each gland is roughly the size of a pea.
The production and release of PTH by the parathyroid glands maintains the homeostasis of serum calcium. PTH suppresses osteoblast activity and enhances osteoclast activity in the bone, which causes bone to break down and release calcium.
Four parathyroid glands, which are tiny glands in the neck beneath the thyroid, secrete the hormone parathyroid.
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A sample of mice (all from the same parents) shows 58 Black hair, black eyes | 16 Black
hair, red eyes | 19 White hair, black eyes 7 | White hair, red eyes
Your tentative hypothesis: The parents are both heterozygous for both traits.
The parents are heterozygous for two loci
How to illustrate the information?This is an example of dihybrid cross as the ratio come to be around 9:3:3:1 for phenotype.
58 black hair black eyes
16 black hair red eyes
19 white hair black eyes
7 white hair red eyes
Alleles are mutated or alternative forms of genes found at loci. A cross can be used to test whether the parents are heterozygous for two loci.
The parent of a dihybrid cross has a cross involving two characters.
Parent generation : Male genotype WWRR * Female genotype wwrr
phenotype: Black hair black eyes White hair red eyes
W allele is for Dominant Black hair over recessive w allele for white hair
R allele is for Dominant Black eyes over recessive r allele for red eyes
F1 generation: WwRr * WwRr
F2 generation: The total gametes form would be 4 as the formula for the gametes is 2n where n is total number of heterozygotes which is 2 (Ww and Rr).
Here, we will get;
Black hair, black eyes (W_R_) =9
Black hair, red eyes (W_rr) =3
White hair, black eyes(wwB_) =3
White hair, red eyes(wwrr) =1
This shows that the parents are heterozygous for two loci as proven by the above dihybrid cross.
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