When a trait is x-linked, a single recessive allele is sufficient for a male to be affected because he carries only one X chromosome
What do you mean a single recessive allele is sufficient for a male to be affected ?Genetic disorders connected to mutations in genes on the X chromosome are referred to as having X-linked recessive inheritance. Because he contains just one X chromosome, a male who carries this mutation will be affected. A female with a gene mutation on one X chromosome but a normal gene on the other is typically unaffected.
Males are more frequently affected by X-linked recessive disorders. Men only possess one X chromosome. The disease is brought on by a single recessive gene on that X chromosome. The Y chromosome makes up the second half of the male XY gene pair.Learn more about X-linked allele here:
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The three-layer fibrous membranes surrounding the brain and spinal cord are collectively called the.
Meninges are considered as the three-layer fibrous membranes collectively surrounding the brain and spinal cord.
The brain and spinal cord are shielded by three layers of membranes called meninges. The Pia mater is the thin inner layer. The arachnoid, a structure resembling a web filled with fluid, is the middle layer and protects the brain. The durable outer layer is referred to as the dura mater. Meninges and CSF's main purpose, according to conventional wisdom, is to protect the central nervous system (CNS).
This is primarily due to the meninges' ability to tightly anchor the central nervous system (CNS) to the nearby bones, preventing side-to-side movement and promoting stability. The CNS's delicate organs are shielded from trauma by the meninges, which act as a barrier of defense. It also has a large number of blood vessels that carry blood to the CNS tissue.
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for 40 pionts!!!
23. Which of these is a feature of most shield volcanoes?
*
1 point
violent eruptions
steep sides
broad base
thick lava
24. Correctly identify these terms for where an Earthquake occurs. [A,B,C]
A.Fault, B.Epicenter, C.Focus
A.Fault, B.Focus, C.Epicenter
A.Focus, B.Epicenter, C.Fault
A.Focus, B.Fault, C.Epicenter
25. Which waves arrive 2nd at the Epicenter, move the slowest and do the most damage?
*
1 point
P waves
S- waves
26. Identify plate boundaries locations where earthquakes may occur....
*
1 point
Convergent Plate Boundaries
Divergent Plate Boundaries
Transform Plate Boundaries
Earthquakes can occur at all boundary types
27. What is the importance of Seafloor Spreading to the Theory of Plate Tectonics?
*
1 point
Where new crust is created as plates move and pull apart
Where many fossils have been found on the sea floor
Where coal deposits have been found connect to other plates
Where glacial deposits indicate it was once frozen
28. The volcanoes (red dots) in this map are MOST LIKELY caused by
*
1 point
Captionless Image
folding.
subduction.
metamorphism.
seafloor spreading.
Answer:
23. broad Base
24. A
25. S-waves are slower than P-waves.
26. Divergent Plate boundaries
*You do realize that your violating community guidelines by asking 6 different questions on one Question.
Your Welcome
although we study the citric acid cycle as the final stage oxidation of carbon from glucose, an in-depth look at the cycle shows intermediates entering and leaving the cycle from a number of metabolic pathways. with all of these demands on the cycle, how does it maintain a minimal level of oxaloacetate (oaa) to allow the cycle to function?
When the potential level of cell is high, OAA can be produced by the condense of two mole of acetyl CoA.
What is an example of metabolic?Both the synthesis and decomposition of glucose molecules are examples of biosynthetic processes. The term "metabolic pathway" refers to a network of linked chemical events that support one another. Through a sequence of intermediates, the route transforms one or more source molecules into products.
What are the metabolic syndrome's five telltale symptoms?Abdominal obesity, high cholesterol, impaired fasting, elevated lipid levels, and low HDL levels are among the group of metabolic factors. The chance of acquiring mellitus, heart disease, dementia, or all three is significantly increased by metabolic syndrome.
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Which is an energy conversion that occurs during cellular respiration?
A. ADP -> ATP
B. FADH2 -> FAD
C. pyruvate -> glucose
D. light energy -> chemical energy
Answer:
i am not tottly sure it may be D or c
Explanation:
Answer:
"Plants use cellular respiration to convert glucose into ATP, which is the form of energy cells can use to drive other cellular processes." with this being said, the best answer would probably be A
Explanation:
Tetrodotoxin binds to sodium channels and blocks the passage of sodium ions. Based on this information, which symptom would most likely occur in an organism exposed to tetrodotoxin?
A.
paralysis due to lack of action potentials to signal muscle tissue
B.
blindness due to proteins in the eyes denaturing and losing functionality
C.
decreased appetite due to the production of hormones that indicate fullness
D.
increased heart rate due to increased nerve impulses to the heart muscles
Paralysis owing to a lack of action potentials to signal muscular tissue would be the tetrodotoxin exposure symptom that would most likely manifest in an organism.
The correct answer is A
Can you recover from tetrodotoxin?The toxicity of a fish is another issue. The liver and ovaries of silver-cheeked toadfish contain tetrodotoxin, as do other organs. An adult human can be killed by this potent neurotoxin at doses as little a two milligrams when it is pure. Compared to cyanide or arsenic, it is a much more powerful poison.
Exists a treatment for tetrodotoxin?No known remedy exists. Supportive care and respiratory support are the mainstays of treatment up until the tetrodotoxin was eliminated in the urine. If a patient shows up within 60 minutes of consuming anything, activated charcoal and/or gastric lavage may be performed.
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Climate warming trends allow plant and insect species to inhabit larger ranges. please select the best answer from the choices provided t f
Global climate change will lead to the destabilization of the natural ecosystems of the planet.True is the proper response.
What does inhibition look like?Illustrations of inhibition
Your inhibition levels may be lower than they are when you are studying hard & avoiding distra-ctions if you check your cell ph-one, ch-at with friends, or head to the kitchen to fe-tch a study snack while you are studying.
How does inhabiting your body work?Inhabiting your body en-tails being conscious of it, paying attention to and learning from the constant feed-back it provides, accepting and feeling everything you experience, including pain, pleasure, happiness, and grief, and speaking of yourself as a whole being, particularly when some "part" of you is experiencing pain.
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Answer:
True
Explanation:
which features are associated with the tracheal epithelium? multiple select question. goblet cells stratified squamous tissue mucous keratin cilia pseudostratified columnar cells
The features are associated with the tracheal epithelium are goblet cells, mucous, cilia and pseudostratified columnar cells.
The trachea and upper respiratory tract include ciliated pseudostratified columnar epithelial cells, whose cilia and mucus secretions assist gather foreign objects so you can cough or sneeze them out.The inside lining of the trachea is coated with goblet cells' sticky mucus, which traps any foreign objects in the air before they enter the lungs.Long, hair-like cilia beat together on the surface of the columnar cells to force mucus away from the lungs like a microscopic conveyer belt.In the trachea and bronchi, the respiratory epithelium is pseudostratified and primarily made up of the three cell types cilia cells, goblet cells, and basal cells. The apical surface is covered with ciliated cells, which help move mucus along the airway tract.To know more trachea check the link below:
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if an iv drop of only water was administered, would this make the bloodstream a hypotonic or hypertonic environment for the red blood cell?
Red blood cells swell and are more susceptible to hemolysis (rupture) when placed in a hypotonic solution. When placed in a hypertonic solution, red blood cells lose water and crenation (recruit).
What are hypotonic and hypertonic?In an osmosis system, there are known hypertonic solutions (solutions with a high solute concentration), hypotonic solutions (solutions with low solute concentrations), and isotonic solutions (two solutions having the same solute concentration).
Red blood cells that are placed in a hypertonic solution will experience cell crenation (shrinkage) because more water leaves the cell than enters. Erythrocytes when in a hypotonic environment, then osmosis will occur from the outside into the cell which will cause the cell to swell.
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Suppose you discovered a mutation in sea urchins that caused them to produce eggs with an overly dense vitelline envelope. What would you expect to see if you combined these eggs with normal sperm?.
When an egg and a sperm fuse, they combine into a new cell called a zygote.
What do we get when sperm and egg combine?When an egg and a sperm fuse, they combine into a new cell called a zygote. The zygote contains all the genetic information it needs to become a new individual. This new cell then divides over and over, eventually forming a complete organism with the same genes in each cell.
Is a zygote a fertilized egg?The fertilized egg (zygote) divides repeatedly as it moves down the fallopian tube to the uterus. First, the zygote becomes a solid ball of cells. Then it becomes a hollow ball of cells called a blastocyst.
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Help with question 3 and help fill out the list. The gizmo is called Cell Types
All mentioned cells are eukaryotic and all have a membrane-bound nucleus, cell membrane, mitochondria, endoplasmic reticulum, Golgi apparatus, vesicles and vacuoles, ribosomes, lysosomes, peroxisomes, cytoplasm
What are cell organelles?Cellular components are called organelles. These cellular organelles include both membrane-bound and non-membrane-bound organelles that exist within the cell and differ in structure and function. They coordinate and function efficiently for the normal functioning of cells. Some of them function by giving shape and support, while others are involved in cell migration and regeneration.
For the given data;
Mouse skin, fly muscle are animal cells that contain the following organelles: nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, vesicles, and vacuoles, ribosomes, lysosomes, peroxisomes, cytoplasm, and cell membrane.
Maple leaf and elodea are plant cells containing the following organelles: mitochondria, a nucleus, ribosomes, smooth and rough ER, Golgi body, lysosomes, peroxisomes, cytoplasm, and a cell membrane.
Fungus cells contain the following organelles: nucleus: endoplasmic reticulum (ER), mitochondria, Golgi apparatus, secretory vesicles, and vacuoles.
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which statement accurately describes type 2 diabetes? a. type 2 diabetes accounts for 65-75 percent of all diabetes cases. b. early on in the disease, the pancreas stops secreting insulin. c. the primary defect is insulin resistance. d. the adipose cells remove too much glucose from the blood.
The following describes type 2 diabetes :
Type 2 diabetes accounts for 65-75 percent of all diabetes cases.The primary defect is insulin resistance.What is diabetes?Diabetes is a chronic medical condition that influences how the body converts food into energy. Our bodies metabolizes most of the food we eat into sugar and release it into the bloodstream. When blood sugar increases, it signals the pancreas to release insulin. Type 1 diabetes occurs when the body's defense system, the immune system, attacks and destroys the insulin-producing beta cells in the pancreas. Scientists believe type 1 diabetes is caused by environmental factors such as genes and viruses.Although there is no cure yet, our scientists are working on groundbreaking weight management research to help people go into remission from type 2 diabetes to get back into range. This does not mean that diabetes is gone forever.To learn more about diabetes from the given link :
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why calling chrysaora fuscescens a jellyfish is misleading? 15 points!!
Chrysaora fuscescens is a sea nettle. The bell of sea nettles is a distinctive reddish-hued golden-brown color.
What is the difference between jelly fish and sea nettle?In reality, the sea nettle belongs to the genus, or class, of jellyfish. Particularly, the genus Chrysaora has species that are classified as sea nettles. Both the Pacific sea nettle (C. fuscescens) and the compass jellyfish (C. hysoscella) are members of this genus, which possesses a number of distinguishing traits.Jellyfish have a transparent, gelatinous body and a medusa, or bell, in the shape of an umbrella. The bell is hung with stinging tentacles. Nematocysts are the name for the venomous cells. The bell of the sea nettle is smooth and milky white, and it can get up to 4 inches in diameter.For more information on sea nettle kindly visit to
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A scientist makes primers specific to a particular str fragment in elephants. These primers are then used to amplify the str fragment from 10 different elephants. Would you expect the fragment to be the same size in all the elephants? explain your answer.
The STR fragments will have different sizes for different animals.
STR means Short Tandem Repeats. STR forms the genome's microsatellite region. STR or microsatellite is that region of the genome where, about two to seven base pairs of the DNA, are repeated multiple times. Such sequences can have a few hundred repeats.
While replicating these micro-satellite regions, the accuracy of the DNA polymerase in proofreading the sequence of the newly synthesized strand, decreases, due to the multiple repeats. As a result of this, the DNA polymerase either adds more or adds less of such repeated sequences as compared to the parental DNA sequence.
This results in the generation of polymorphism in the repeat regions. Due to the difference in the size of the STR in different individuals, the size of the fragment amplified through PCR will vary for different elephants.
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b. excluding the possible rare polycistronic message, how can a single mrna molecule in a eukaryotic cell produce proteins with different activities?
A single eukaryotic gene can give rise to multiple different proteins due to alternative slicing mechanisms and different promoters.
What is eukaryotic gene?A typical eukaryotic gene consists of a series of sequences found in the mature mRNA (called exons) interrupted by introns. Intergenic regions are also not expressed, but they help chromatin assembly and may contain promoters.Eukaryotic gene is linear, condensed into chromosomes by histones, and telomeres at both ends to protect it from decay. Prokaryotes contain circular DNA in addition to smaller transmissible DNA plasmids.Eukaryotic gene consists of mitochondrial DNA in addition to nuclear DNA. Unlike prokaryotic cells, eukaryotic gene can regulate gene expression at different levels. Eukaryotic gene expression begins with controlling access to DNA. This form of regulation, called epigenetic regulation, occurs before transcription is initiated.To learn more about eukaryotic gene from the given link :
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which antibacterial medication is commonly given to treat antibiotic-associated pseudomembranous colitis due to clostridium difficile
Vancomycin or fidaxomicin is commonly given.
What is pseudomembranous colitis?
Intestinal inflammation is brought on by the Clostridium difficile bacteria.
The disturbance of normal, healthy bacteria in the colon, frequently as a result of antibiotics, leads to Clostridium difficile colitis. C. Additionally, spores can spread difficile from one person to another. The colon may suffer serious harm, and it might even be fatal.
Diarrhea, stomach ache, and fever are among the symptoms.
Antibiotics are used in treatment. The infection may return despite antibiotic treatment. Surgery or a fecal transplant may be required in rare circumstances.
Vancomycin or fidaxomicin (Dificid) is most frequently utilized, depending on your condition. Metronidazole (Flagyl), which is an alternative if these medications are unavailable or cannot be tolerated, can be utilized.
Your doctor might advise a vancomycin enema or oral vancomycin combined with intravenous metronidazole for severe disease.
Hence, vancomycin or fidaxomicin is commonly given to treat antibiotic-associated pseudomembranous colitis due to clostridium difficile.
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hypersecretion of parathyroid hormone would produce changes in the bone similar to those associated with
Hypersecretion of parathyroid hormone would produce changes in the bone similar to those associated with Osteomalacia.
Osteomalacia is the softening of bones that occurs because of a problem with vitamin D, which helps your body absorb calcium.
Complexity in hyperparathyroidism may cause the long-term effect of very less calcium in your bones or higher amount of calcium in your bloodstream. Complications Associated with this condition is Osteoporosis and Osteomalacia . The loss of calcium from bones often results in weak, brittle bones that break easily.
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Annie wants to study the effect of glucose on bacterial colonies. She grows two colonies of bacteria—one with glucose present in the environment and one in an environment without glucose. Categorize the statements about the experiment as either hypotheses or observations.
Glucose may cause
an increase in
bacterial growth.
The bacterial colonies grown
without glucose don’t have
capsules around their cells.
Bacterial growth in the
glucose environment
increased rapidly and
then stopped after
some time.
Increased glucose may
lead to capsule
formation in bacteria.
The statements that are hypotheses are: (1)Glucose may cause an increase in bacterial growth; (4) Increased glucose may lead to capsule formation in bacteria.
The statements that are observations are: (2) The bacterial colonies grown without glucose don’t have capsules around their cells; (3) Bacterial growth in the glucose environment increased rapidly and then stopped after some time.
Glucose is the main food component of microorganism as well as many large organisms including humans. It is the source of instant energy. Glucose is broken down inside the living body to yield energy in the form of ATP.
Capsule is the layer present outside of the cell envelope and is made up of carbohydrates. The main role of capsules is to protect the bacterial cell from phagocytosis or death by the immune cells of the host body.
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in aphasia, the ability to speak or read is affected. a deficit in which of the following cortical areas would not lead to aphasia?
The following parts of the brain would not cause aphasia: prefrontal cortex.
n the case of a patient with Broca's aphasia, which lobe of the brain is affected?
Damage to the frontal lobe of the brain is what causes Broca's aphasia in sufferers. Because the frontal lobe has a role in motor movements as well, they frequently develop right-sided weakness or paralysis of the arm and leg.
Which of the following describes the symptoms of Broca's aphasia?Grammar errors or absences are signs of Broca's aphasia. a hard time making entire sentences. by leaving out specific words like "the," "an," "and," and "is" Instead of saying "I want the cup," a person with Broca's aphasia would say, "Cup, me."
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During which part of the action potential do most voltage-gated sodium channels open?.
Depolarization Once the membrane potential of the cell exceeds a threshold, voltage-gated sodium channels start to open. Rapid sodium inflow causes a significant depolarization known as the rising phase.
When the membrane potential in their vicinity depolarizes, voltage-gated sodium channels, which are transmembrane proteins, open, allowing sodium to flow from the area of higher concentration (typically the cell's exterior at resting potential) to the area of lower concentration (typically the interior of the cell).The P wave, which denotes the atria's depolarization, is typically the first wave recorded in an electrocardiogram (ECG). The QRS complex then develops as a result. The depolarization of the ventricles is represented by the QRS wave. The ventricles constrict during the depolarization phase, forcing blood into the atria. Therefore, depolarization of the ventricles is the right response.
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5. Social support can
Select one:
a. reduce blood pressure
b. prevent infections
c. reduce circulating stress hormones
d. all of the above
Social support can reduce blood pressure, prevent infections, reduce circulating stress hormones.
The importance of social support was greater for those with higher blood pressure. Men in their middle years and older adults who do not live with their wives may be especially at risk for hypertension. Participation in neighborhood organizations may lower these people's blood pressure.
What about social support?Social support appears to act as a buffer, lowering or stopping physiological reactions to stress. Lifelong social buffering takes place. Stress hormones can be any of the following, but not just: The primary stress hormone in humans is cortisol. norepinephrine and adrenaline are examples of catecholamines. Vasopressin. Don Drennon-Gala and Francis Cullen, both of whom took inspiration from a variety of theoretical traditions, published works that gave rise to the social support theory. The core tenet of the idea is that the possibility of crime and delinquency is decreased by instrumental, informational, and emotional assistance. Received support, often referred to as enacted support, describes particular supporting activities (such as counsel or reassurance) provided by providers during critical periods. Additionally, structural support or functional support can be used to quantify social support. Social exclusion, unpleasant marriages or partnerships, anxiety brought on by major life changes (such as the loss of a spouse, retirement, or change in living situation), socioeconomic disadvantage, and age, racial, or sex discrimination are some examples of social stressors.Learn more about social support here:
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Cellular respiration is balanced by photosynthesis; the two processes work together to maintain the cycling of carbon and oxygen among earth systems. What describes the roles of carbon dioxide and water in these two processes?.
The statement that best describes the roles of carbon dioxide and water in these two processes is as follows:
Carbon dioxide and water are the reactants of photosynthesis and the products of cellular respiration.
Green plants and certain other species employ the process of photosynthesis to create food from carbon dioxide and water with the help of sunlight. In most cases, the green pigment chlorophyll is used in photosynthesis in plants, which produces oxygen as a byproduct.
Plants absorb water and carbon dioxide from the air and soil during photosynthesis. Water is oxidized, which means it loses electrons, while carbon dioxide is reduced, which means it receives electrons, inside the plant cell. Water is converted into oxygen and carbon dioxide into glucose as a result.
A biological process known as cellular respiration is one in which, in the presence of oxygen, a kind of sugar known as glucose is converted into energy in the form of ATP. This effort is necessary to complete metabolic activities.
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what kind of organisms would be more likely to require a circulatory system to transport gasses, nutrients, and waste
Gases, nutrition, and waste are transported throughout the body of complex organisms through the circulatory system.
What is circulatory system responsible for carrying?Oxygen, nutrients, and hormones are delivered to cells by the circulatory system, which also eliminates wastes like carbon dioxide. To keep everything moving in the right direction, these streets are one-way only.
What living things are the most complicated?The most sophisticated species ever investigated, gnomically speaking, is a minuscule, transparent water flea. The first crustacean whose genome has ever been sequenced is Daphnia pulex, and it turns out that it contains roughly 31,000 genes, which is 25% more than our own.
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what will be the genotypic and phenotypic ratio of the f1 generation resulting from a cross of two grasshoppers, both with red and yellow stripes?
The genotypic and phenotypic ratio of the F1 generation resulting from a cross of two grasshoppers, both with red and yellow stripes is (1:2:1) 25% red, 50% red and yellow, and 25% yellow.
How to determine the genotypic and phenotypic ratio of the F1 generation?From the question, we know that red stripes are expressed from the homozygous RR genotype, yellow stripes from the homozygous YY genotype, and both from the heterozygous genotype.
The cross can be represented as shown in the figure.
Hence the phenotypic ratio is:
Red striped: 1
Red and Yellow striped: 2
Yellow striped: 1
So, the correct answer is 1:2:1.
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I need help on this can someone help me
Nitrogen is considered a limiting nutrient because Nitrogen stays suspended in the atmosphere and can't get to the roots of plants. Option B.
It is often a nutrient that limits the growth of an organism. This is because certain forms of nitrogen, found in nitrogen gas in the atmosphere cannot be assimilated by most organisms. Because nitrogen nutrients are water soluble, they are easily washed away making them unavailable to plants. For example, most plants typically require nitrogen daily to grow in bulk.
However, the soil contains very little nitrogen. This makes nitrogen the limiting nutrient. Nitrogen is limited because it must be fixed by bacteria in order to be converted into a form that can be used by plants and eventually passed on to animals.
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In the gal gene system, which protein binds to the activation domain of the activator protein, ultimately blocking transcription in the absence of galactose?.
GAL80 binds to the activation domain of the activator protein, ultimately blocking transcription in the absence of galactose.
What is GAL system?
The GAL4-UAS system is a biochemical method used to study gene expression and function in organisms such as the fruit fly (Drosophila).
The GAL genes provide a closely regulated system in which to study gene-specific chromatin structure. GAL structural genes are inactive without galactose but are highly transcribed in its presence; the expression patterns of the regulatory genes can account for many of the features of GAL structural gene control.
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Neha's mother is making vegetable pickle. She does the following. Step 1 - cuts the vegetables into small pieces Step 2 - soaks the vegetables in water for sometime Step 3 - mixes the vegetables with spices Step 4 - stores the mixture in a cool dark place One of these steps may cause the pickles TO SPOIL. Which step is it likely to be?
Answer:
Step 4 will spoil the pickle
the experiments by hershey and chase helped confirm that dna was the hereditary material on the basis of the finding that
The experiments by Hershey and Chase helped confirm that DNA was the hereditary material on the basis of the finding that in the cell radioactive phosphorus was found.
In 1952, Alfred Hershey and Martha Chase performed an experiment to find genetic material in organisms. Hershey and Chase experiment prove that DNA functioned in controlling genetic inheritance, not proteins. Bacteriophages(virus) are composed of DNA and protein and infect bacteria, their DNA (labeled by radioactive phosphorus) enters the host bacterial cell, but most of their protein (labeled by radioactive sulfur) does not. Thus, the protein had not entered the bacteria provided that DNA was the genetic material and is passed from a virus to a bacteria. This experiment led to an unequivocal proof of DNA as genetic material.
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Help I need this done by today!
Protease enzymes break down proteins into amino acids. The breakdown can be followed using albumen solution. Albumen is a protein which can be mixed with water to make a solution. Albumen solution is cloudy. When the protein is broken down, the solution goes clear.
Describe how you would carry out an experiment to test the effect of pH on protease.
Include details of control variables and the range of pH values that you would use.
To optimize the pH for the activity of the mentioned protease, perform the standard protease activity Assay with multiple buffer solutions (changing just the pH of the reaction), focusing on the pH range where the enzyme activity is high. However, keep in mind the buffer should be employed at a certain pH range.
Acetate buffers (pH 4.5-5.5), phosphate buffers (pH6-7.4), and Tris-HCl are examples (8-9). To assess pH stability, pre-incubate the enzyme in appropriate buffer solutions for a time set by you, say 2 hours, while periodically withdrawing an aliquot (maybe at 20-minute intervals) to be used as enzyme solution in the standard enzyme activity experiment. This allows you to compute the enzyme's residual activity and assess how stable it is at each pH.
What are Protease enzymes?Proteins are broken down into amino acids by protease enzymes. Albumen solution can be used to monitor the breakdown. Albumen is a protein that may be made into a solution by combining it with water. The albumen solution is hazy. The solution becomes transparent when the protein degrades.
Proteases are enzymes that break down protein peptide bonds; they are classified as acid, neutral, or alkaline proteases. Plants, animals, and microorganisms can produce these enzymes under a variety of conditions, including high salt concentrations.
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Describe how the nervous system coordinates the response of the skin to cold weather.
The sympathetic nervous system is stimulated when the skin's cold receptors are stimulated, resulting in cold thermal sensations. In the skin, arms, and legs, sympathetic stimulation causes vasoconstriction.
In a variety of physiological ways, the nervous system coordinates the skin's response to cold weather.
The following are the physiological changes that occur in response to cold temperatures:
Cold weather triggers the activation of cold receptors on the skin's surface.The sympathetic nervous system is stimulated and cold thermal sensations are brought on by these receptor stimulations.This stimulation causes vasoconstriction in the skin, arms, and legs, which reduces blood flow and makes the skin thinner, which makes superficial tissues more efficient at insulating heat.Below the thermoneutral zone, metabolic heat generated by shivering is stimulated. As a result, these physiological changes help coordinate the skin's response to cold weather.Know more about the nervous system here: https://brainly.com/question/29355295
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which of the following is an accurate description of what happens in a cell during metaphase i? select one: crossing over occurs homologous chromosomes line up in the middle of the cell the nuclear envelope breaks up sister chromatids separate and migrate to opposite poles
In metaphase I the chromosome tetrads align or line up in the middle of the cell.
The first stage of the meiotic cell division cycle is known as metaphase I. It is a crucial stage since it decides how many chromosomes each daughter cell will have. The sister chromatids, which are each cell's two copies of a chromosome, migrate in opposite directions during metaphase I.The lining-up phase of metaphase I in meiosis I moves rather quickly. At the metaphase (or equatorial) plate, which is a pair of chromosomes with four chromatids (2 originals, 2 copies), tetrads or bivalents are arranged in a straight line. This plate is a hypothetical centre line along which the chromosomes are positioned; it does not actually exist.Each pair's particular chromosome stays close to its companion and stacks one chromosome on top of the other. One chromosome will eventually migrate to one pole and the other to the opposing pole as a result of this. Furthermore, it is irrelevant which way these chromosomes are oriented horizontally in relation to this hypothetical line. Either parent's DNA may be on either side of the cell.To know more about Metaphase I check below link:
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