A researcher determined that a strain of E. coli is producing a shortened version of a protein required for glucose metabolism, and this is due to the premature termination or the nonsense mutation.
What is "premature termination" in translation?The polypeptide chain is produced during the translation process and can be stopped by a variety of factors, such as miRNA attachment to the polypeptide chain or any base mutation. If a single base mutation happens, that changes the codon into a stop codon, which is called a nonsense mutation, and this causes the short version of the protein.
Hence, this is due to the nonsense mutation in the polypeptide chain.
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trees are valuable to the family and the community for the products and amenites they give such as
Trees are valuable to the family and the community for the products and amenites they give such as improving air quality, mitigating stormwater, providing shade and enhancing aesthetic beauty, providing life home ground, and increasing property price.
Trees offer oxygen that we'd like to breathe. Trees scale back the number of storm water runoff, that scale backs erosion and pollution in our waterways and should reduce the consequences of flooding. several species of life depend upon trees for surroundings. Trees give food, protection, and houses for several birds and mammals.
The world's forests absorb a 3rd of worldwide emissions per annum. Particles, odors and waste product gases like N oxides, ammonia and sulphur dioxide choose the leaves of a tree. Trees absorb these toxicant chemicals through their stomata, or 'pores', effectively improving air quality.
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Which of the following structures is found in a plant cell but NOT an animal cell?
Answer: A LARGE CENTRAL VACUOLE
Explanation:
Plant cells have a cell wall, chloroplasts and other specialized plastids, and a large central vacuole, which are not found within animal cells.
Compare and contrast the exoskeleton with the endoskeleton and provide an example of species that contain each type.
Endoskeleton is an internal skeleton that provides support and protection for example cartilage and bone. Exoskeleton is an external skeleton which provides protection to the body from outside like hair , scales and horns.
Main function of endoskeleton and exoskeleton is to provide structural and functional support. Both endoskeleton and exoskeleton helps in the movement of the body and also protect internal organs.
Endoskeleton is mainly found inside of vertebrates, that are mammals, birds, fishes, amphibians, and reptiles, whereas the exoskeleton is found inside of invertebrates like insects, spiders, crabs, centipedes, and millipedes.
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The ------- is a type of regulator protein that binds to a region of DNA in the promoter of a gene called the operator and prevents transcription from taking place.
repressor
The operator is bound by the repressor regulator protein, which stops the structural gene from being transcribed. 20
According to genomics, a gene's promoter is the area of DNA upstream of it where important proteins, such RNA polymerase & transcription factors, attach to start the gene's transcription. Any protein that affects the sections of a DNA molecule that RNA polymerase transcribes during transcription is referred to as a regulatory protein (gene-regulatory protein). As a result, these proteins, which also include transcription factors, aid in regulating the cellular production of proteins. Proteins known as transcription factors interact either activate / repress the translation of a certain gene by binding to enhancer / promoter regions. The majority of transcription factors have DNA sequences they can bind to. Based on structural similarity, these protein can be categorized into families.
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How do I answer this question?
Answer:
Use the six stages of methods below to identify which is what.
Explanation:
The enzyme carbonic anhydrase is a protein that binds to two small molecules: water and carbon dioxide. By holding the two molecules in the proper position, the enzyme allows the two molecules to react to form a product, carbonic acid. The enzyme then releases the product and becomes available to catalyze the same reaction once again.
Carbonic anhydrase is found in the bloodstream of the human body. The bloodstream is usually at a temperature of 37°C. How might an increase in a person’s body temperature affect the function of carbonic anhydrase and other enzymes in the body? Be sure to explain any effects on the enzyme itself and the reaction that it catalyzes.
The enzyme then releases the product and becomes available to catalyze the same reaction once again in Carboxyl and amino groups.
The enzyme carbonic anhydrase is a protein that binds two small molecules water and carbon dioxide. By holding the two molecules in place the enzyme allows them to react to form the product carbonic acid. Carbonic anhydrase facilitates the reaction of carbon dioxide with water to produce hydrogen and bicarbonate ions.
Le Chatelier's principle is used to describe the equilibrium in the carbonic anhydrase reaction. The active site of carbonic anhydrase contains a zinc atom and a water molecule bound to three histidine residues. Produces bicarbonate ions and transports CO2 to plasma.
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which of the following are disadvantages to culturing techniques for diagnosis of infectious diseases?
Antibiotic susceptibility cannot be addressed with culture techniques. Most pathogens need at least one night to form colonies, and many bacteria cannot be cultivated in lab culture.
What are the restrictions on the ability to diagnose illnesses using culturing techniques?Isolating the actual bacterium that is the cause from other germs in the obtained material might be challenging. - Because incubation takes 18 to 24 hours in culture, several deadly infectious disease cannot be treated swiftly and successfully.
Why does the diagnostic process require a pure culture?To better understand and treat caused diseases, a pure bacterial culture is still necessary for the research of its virulence, susceptibility to antibiotics, and genomic sequence.
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which upper gi position best demonstrates a possible gastric diverticulum in the posterior wall of the fundus of the stomach?
Right lateral position is the upper gi position best demonstrates a possible gastric diverticulum in the posterior wall of the fundus of the stomach.
In the lateral role, the affected person lies on one side. Some not unusual place methods that could require a affected person to be placed withinside the lateral role consist of lower back surgeries, decrease extremity surgeries, thoracic surgeries, Ear Nose Throat (ENT) surgeries, and kidney surgeries.
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which of these contain phytochemicals? question 14 options: a) tomatoes b) egg yolks c) fish d) all of the above
Phytochemicals are present in tomatoes.
Lycopene is a sort of phytochemical, right?One of the many colors found in plants known as carotenoids is lycopene. From the yellow color of squash to the orange color of pumpkins to the red color of tomatoes, carotenoids produce a variety of hues.
What phytochemical causes red tomatoes?Because the phytochemical lycopene is present, most tomatoes turn red when they are ripe (a biologically active compound produced by plants). They are rich in chlorophyll, a phytochemical that also contributes to the green color of young tomatoes.
How do phytochemicals work?Plants contain substances called phytochemicals.
Foods made from plants, such as fruits, vegetables, whole grains, nuts, seeds, and legumes, contain these compounds.
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what is the difference between the types of muscular tissue? what is the main function of each one?
Muscles are of three types, skeletal, smooth, and cardiac.
1.Skeletal muscles are muscles that are linked to bones. Abdominal muscles and biceps are two examples.Skeletal muscles are voluntary muscles, meaning you control how and when they move and work. Nerves in your somatic nervous system send signals to make them function. If you reach for a book on a shelf, you’re using skeletal muscles in your neck, arm and shoulder.
2.Smooth muscles are found in the walls of internal organs such as the intestine and blood vessels.Smooth muscle makes up your organs, blood vessels, digestive tract, skin and other areas. Smooth muscles are involuntary, too. So, your autonomic nervous system controls them as well. For example, muscles in your urinary system help rid your body of waste and toxins.
3.Cardiac muscle tissue is contractile tissue present only in the heart. Cardiac muscles are only in your heart. They help your heart pump blood throughout your body. They’re involuntary muscles that your autonomic nervous system controls. That means they work without you having to think about it.
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Which of the following effects of climate changes poses the greatest threat to the Pacific region?
A.
rising sea levels
B.
lower average temperatures
C.
drought
D.
increased rainfall
Answer: Answer is A. Rising Sea levels.
Explanation:
An average sea level rise of between 25 cm – 58 cm is predicted by the middle of this century along the coastlines of Pacific Island countries, which would be devastating for islands that sit at or just above sea level. If global temperatures increase 2degrees Celsius above preindustrial levels, as is becoming increasingly likely, it is estimated that 90% of the coral reefs in much of the Pacific Island region could suffer severe degradation, which will have a devastating effect on the marine species that depend upon these ecosystems.
There is only one piece of evidence that supports the mammal competition hypothesis. After viewing the details of this evidence and its relation to the mammal competition hypothesis, do you think this is a widely accepted conclusion in the scientific community? explain your answer. (site 1).
Mammals undoubtedly thrived after the extinction of the dinosaurs, and fossil records indicate that this happened suddenly.
Therefore, I agree with the scientific community.
The idea of mammal competitiveness.
The fossil records typically provide proof for the mammal opposition theory. A sudden extinction of dinosaurs indicates a cataclysmic event.
According to the fossil report, depending on the region and interpretation Different things, mammals undoubtedly flourished after the extinction of the dinosaurs, but it is unclear whether they faced minimal competition or frequently engaged in competition for scarce resources.
Mammals might return outside once the heat was shut off and make the most of the available food supplies. Although there may not have been enough food for dinosaurs, mammals' more diversified appetites helped them to survive.
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A particular leg bone for dinosaur fossils has a mean length of 60 inches with a standard deviation of 3 inches. What is the length if the z-score is 0. 67?.
The average length of a specific dinosaur leg bone is 60 inches, with a standard variation of 3 inches. If a z-score is 0, then the length is 67.
Divide your data point by your standard error after taking your data point and subtracting the mean from it. How is the z-score determined? Z-scores are calculated using the formula z = (x-)/, where x represents the raw score, the population mean, & the population variation. The z-score is just the raw score less the population mean, split by the population variance, as the calculation demonstrates. You now have your Z-score. For instance, a scoring of 450 would equate a scores of (450-500)/100 (= -50/100 = -0.50 on a scale with a mean of 500 as well as a standard variation of 100, indicating that the scoring is half a variance below the mean.
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During meiosis, the process of crossing over results in new combinations of alleles because.
Answer:
When chromatids "cross over," homologous chromosomes trade pieces of genetic material, resulting in novel combinations of alleles, though the same genes are still present. Crossing over occurs during prophase I of meiosis before tetrads are aligned along the equator in metaphase I.
Explanation:
In green plants, what is the sequence of photosystems, and what does each photosystem produce?.
In green plants arrangement of photosystems:
Photosystem II→ ATP production→ Photosystem I→ NADPH production.
What are photosystems?Although PSII arrives first in the electron flow route, it is given the second designation since PSI was found first.
Chloroplasts either export this three-carbon sugar phosphate or transform it internally into starch. Carboxylation, reduction, isomerization, condensation, dismutation, and phosphorylation are the cycle's four steps, respectively.
Therefore photosystem is arranged from Photosystem II to NADPH production.
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The adrenal medulla is important to the sympathetic branch of the autonomic nervous system because.
The adrenal medulla is important to the sympathetic branch of the autonomic nervous system because it is a source of catecholamines.
Hormones of the adrenal medulla are the catecholamines, that also function as classical neurotransmitters in the autonomic nervous system. Adrenal medulla is modified as neural tissue and its activity is governed by a neural input.
Adrenal medulla, is a modified ganglion of the sympathetic nervous system, they also secretes norepinephrine and epinephrine into the blood and response to neural signals directed via sympathetic nerve pathways coming via the spinal cord.
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student designed an experiment testing the effect of light distance on the rate of photosynthesis. she placed samples of elodea in test tubes and arranged the tubes at various distances from the light. she then counted the number of bubbles produced to measure the rate of photosynthesis. her results are in the table.
The amount of oxygen produced can be quantified in order to determine the rate of photosynthesis. Elodea leaves are divided into little pieces, and the cut ends are put into the funnel's stem.
What did Elodea's bubbles in this experiment represent?The bubbles that you observe rising from an elodea cutting's leaves are actually a result of the photosynthesis process. In some types of algae and in plants, photosynthesis takes place. In the process, light energy is changed into a sort of chemical energy that is then stored as sugar.
What substance did we use to examine whether photosynthesis existed in Elodea?To test whether photosynthesis and/or other processes are occurring, you will conduct experiments using the dye Phenol Red in this exercise. In Elodea plants, cellular respiration is taking place. The experiments look into how light affects these processes.
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h. erectus's distinctive nucal torus suggests his species, but another physical trait is a more reliable way to id a h. erectus: what is it?
The physical feature of Homo Erectus is the supraorbital torus.
Homo Erectus tended to have thick skull bones. They also share several thickened or strengthened areas of the skull, including the:
Supraorbital torus: It is present in all of the H. erectus fossil skulls and is thick and prominent in many of them.Nuchal torus: The thickened bony shaft above the neck muscle attachment area, at the back of the skull. More or less thick and projecting distinct individual fossils, it is present in almost all adults of H. Erectus.Corner torus: Area of thickening associated with the most posterior attachment of the temporalis muscle, to the parietal bone.Sagittal knee: H. erectus crania often have areas that are flat on either side of the midline, forming an angle along the top of the skull. This can be in the frontal bone, in the parietal, or both.Learn more about the physical features of Homo Erectus https://brainly.com/question/16521810
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which following pair is correctly matched? a.g1 phase - dna replication b.s phase - dna replication c.m phase - cell growth d.g0 phases - cell growth
In the S phase, DNA replication takes place. In a cell cycle, the S phase, or synthesis phase, comes after the G1 phase. Hence, option b is the correct answer.
What is a cell cycle?The cell cycle consists of four phases, such as the G1 phase, S phase, G2 phase, and M phase. Before entering the G1 phase, the cell remains in the G0 phase. G0 is the resting phase, and the cell prepares itself to enter the cell cycle. In the G1 phase, the cell grows in size. In the S phase, DNA replication takes place. In the G2 phase, further growth takes place of the cell. In M phase cell divides.
Hence, option b is the correct answer, as DNA replication takes place in the S phase.
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describe the contractile force of the muscle when a stimulus of increasing strength was applied to the muscle
Muscle contraction is the activation of tension generating sites within muscle cells.
What are contractile force of muscles?At roughly 60% of resting length, contractile force is zero; at about 90% of resting length, it increases; at about 120%–130% of resting length, it reaches its maximum; and at about 160% of resting length, it returns to zero.
Actomyosin networks, which are made up of force-transmitting actin structures and force-generating myosin motors, are the main part of the cellular contractile force machinery.
The amount of force that muscle fibers produce is managed by a motor neuron. The rate code and the size principle are the two principles that control the link between motor neuron activity and muscle force.
Later in muscle stimulation, when contractile strength increases, motor units with larger, less excitable neurons are used. Enhancing a muscle's ability to contract
Muscle contraction is the activation of tension generating sites within muscle cells.
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some chemicals can pass through the cell membrane, but others cannot. not all chemicals can pass through a cell membrane with equal ease. the cell membrane determines which chemicals can diffuse into or out of a cell. this is called a __________ membrane because it does not allow all chemicals to freely move.
Some chemical compounds can pass via the mobile membrane, but others cannot. not all chemical substances can skip through a cell membrane with identical ease the cell membrane determines which chemical substances can diffuse into or out of a cell. this is called a cell membrane as it does now not allow all chemical compounds to freely pass.
The cell membrane's predominant trait is its selective permeability, because of this that it lets in some materials to pass it without problems, but now not others. Small molecules that are nonpolar (don't have any fee) can go through the membrane without problems through diffusion, but ions (charged molecules) and large molecules generally can't.
Cell membranes are an example of semi-permeable membranes. cellular membranes allow small molecules which include oxygen, water carbon dioxide, and oxygen to pass via however do not permit large molecules like glucose, sucrose, proteins, and starch to go into the cell immediately.
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what would be the impact on lymph formation if the osmotic force at the venous end of the capillary was more successful at recovering fluid lost at the arterial end?
The hydrostatic pressure drops from the venule end to the arteriole end as fluid flows through the capillary. Near the venule end, the osmotic pressure in the interstitium, which is essentially constant, will be greater than the capillary hydrostatic pressure.
When the blood pressure at a capillary's venous end is lower than the osmotic pressure, fluid enters the blood vessel. Blood always flows in the direction of its gradient of concentration. It travels from the capillaries to the venules and then to the veins, which return it to the heart.
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while the semilunar valves are open during a normal cardiac cycle, the pressure in the left ventricle is
Using the theories of ventricle, we got that the pressure in the left ventricle is higher than the pressure in the aorta while the semilunar valves are open during a normal cardiac cycle.
The semilunar valves open when ventricular muscle contracts and generates blood pressure within the ventricle higher than within arterial tree, When the pressure in left ventricle exceeds the pressure in the aorta, ventricular ejection phase d, pulmonary semilunar valve will open, the semilunar valves open, the ventricular filling phase b, The semilunar (aortic and pulmonary) valves open at the beginning of this phase of the ventricular systole.
Hence, while the semilunar valves are open during a normal cardiac cycle, the pressure in the left ventricle is higher than the pressure in the aorta.
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a researcher performs a gram-stain and a catalase test on a clinical sample. the gram-stained cells are purple cocci. bubbles form when hydrogen peroxide is added to a smear of living cells. these cells could be: group of answer choices staphylococcus aureus clostridium perfringens escherichia coli enterococcus faecalis streptococcus pneumoniae
Gram-stained cells are purple cocci, bubbles form when hydrogen peroxide is added to a smear of living cells these are streptococcus pneumoniae .
Catalase test is important in order to determine whether a gram-positive cocci is a staphylococci . Catalase is an enzyme that converts hydrogen peroxide to water and oxygen gas. In the test bacteria are simply mixed with H2O2.
As a result of test if the bubbles appear the bacteria are catalase positive. Peptidoglycan forms about 90% of the cell wall in gram-positive bacteria so they appear blue or purple .
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between neanderthals and denisovans which of them has contributed the advantageous alleles to the human gene pool that affect the skin and immune traits?
The following characteristics distinguish modern humans from other Homo sapiens species, Neanderthals, and both of them:-
Characteristics of early human
Humans have thin, flexible fingers, light bones, and quick mobility. They also have a long childhood.
Neanderthals had big fingers, heavy bones, and slow movements.
Both: Made use of tools; stood straight.
Describe traits.
The quality that a person possesses and is referred to as his personality is referred to as a trait. The property of being consistent, steady, and differentiable from person to person is included in the feature.
There are three different categories of qualities: cardinal, central, and secondary traits.
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In the process of , dna is used as a template for making another type of nucleic acid called. The process begins when the enzyme binds to a region called the.
A crucial biological process called transcription involves copying genetic information from DNA to messenger RNA, another nucleic acid.
What acts as the DNA replication template?The double helix of DNA serves as a model for self-replication. Each strand of DNA can be used as a template to determine the nucleotide sequence in its complementary strand since nucleotide A will only pair successfully with T and nucleotide G will only pair successfully with C.
Why is protein synthesis called translation yet RNA transcription is not?Why is protein synthesis referred to as "translation" and RNA synthesis as "transcription"? RNA synthesis uses nucleic acids to create a complementary copy of the DNA, whereas protein synthesis necessitates changing the information in the RNA.
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what is it called when each of two species provides the selective pressure that determines which of the other's traits is favored by natural selection?
when each of two species exerts selective pressure which determines which trait of the other is favored by natural selection it is called Coevolution
In a biological evolutionary context, coevolution refers to the interdependent evolution of at least two species. Coevolution was first described in the context of insects and flowering plants and has since been applied to important evolutionary events such as sexual reproduction, infectious diseases, and ecological communities. Coevolution works by mistakenly pushing each other in two or more ways, like weapons against each other. Classic examples are predator-prey, host-parasite, and other competitive interspecies relationships. The process of coevolution generally involves only two species but may involve many species. In addition, coevolution also creates adjustments for mutual benefit. An example is the evolution of flowering plants and their associated pollinators (such as bees, birds, and other insect species).
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When each of two species provides the selective pressure that determines which of the other's traits is favored by natural selection is called by coevolution.
Explanation:The term coevolution is used to describe when two or more species mutually influence the evolution of the other species.Coevolution in plants is not just evolution of one organism, but coevolution means that two different organisms evolve in response to each other. The result has been an explosion of biodiversity, both in flowering plants and the animals that pollinate them.In biology, coevolution occurs when two or more species influence each other's evolution through the process of natural selection. The term is sometimes used for two traits of the same species that influence each other in evolution as well as coevolution in gene culture.Learn more
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what protein component(s) appear to be necessary for recognition of the s. pombe start site and transcription initiation? explain.
RNA polymerase is the component appear to be necessary for recognition of the start site and transcription initiation.
What is transcription and what protein component is essential for initiation of transcription?Transcription is the process in which the information from coding strand of DNA is transferred to the coding strand of RNA.Transcription is different in prokaryotes and eukaryotes in terms of participating RNA.In prokaryotes there is only single RNA polymerase transcribing the information and in eukaryotes there are three different RNA transcribing.Here the question is for protein component which is essential for the recognition of start site and transcription initiation.Hence the answer is RNA polymerase which is the component appear to be necessary for the recognition of start site.To know more about protein visit:
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If a mother has some mutations in her mitochondrial dna, who will inherit the mutations?.
The mitochondrial mode of inheritance is strictly maternal, whereas nuclear genomes are inherited similarly from each dad and mom. therefore, mitochondria-related disease mutations also are constantly inherited maternally.
Mutations in mt DNA can both be inherited or sporadically obtained in the course of existence. Inherited mutations are randomly segregated among number one oocytes and between one-of-a-kind tissues. paintings assessing mutation load in specific fetal tissues has validated that mutation load is comparable throughout tissues [8].
Mitochondrial DNA mutations at excessive levels motive mitochondrial dysfunction, with a view to have consequencezs on ATP levels and different cell strategies. This mitochondrial dysfunction may then be the motive of neuronal loss in some of illnesses.
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4. A biologist reads about a study in a peer-reviewed journal where the results do not agree with her
research. this scientist must remain __ and think about how those results might affect her own work
A biologist reads about a study in a peer-reviewed journal where the results do not agree with her research. this scientist must remain Open minded and think about how those results might affect her own work.
A biologist is a scientist who conducts biological research. Biologists are interested in studying all forms of life on Earth, whether they are single cells, multicellular organisms, or communities of interacting populations. The goal of basic research biologists is to advance knowledge about the natural world.
Most biologists today have one or more academic degrees, such as a bachelor's degree plus an advanced degree, such as a master's degree or a doctorate. Biologists, like other scientists, can be found working in a variety of industries, including academia, nonprofits, private industry, and government. The founder of biology, Francesco Redi, is regarded as one of the greatest biologists of all time.
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