1. Affinity between an enzyme and a substrate will only affect reactions rates at _______ substrate concentrations.
A) Low
B) High
2. How many amino acids long will the protein be that is coded for by the following transcript:
5'-AACGACCUAUGCCCUAGGGGCCAC-3'
A) 2
B) 1
C) 3
D) 4
3. Fermentation supplies cells with _________, which is needed for glycolysis when oxygen levels are low.
Group of answer choices
A) NAD+
B) NADH
C) FADH2
D) ATP
1. At low substrate concentration enzyme is free to bind to substrate and thus affect reaction rate. At higher substrate concentration, no enzyme is available for binding with substrate thus no affect on rate of reaction.
2. The sequence given will have 02 amino acids.
3. Fermentation helps cells producing NAD+ which works as electron acceptor further during aerobic reaction giving NADH, the reducing energy of cells.
Fermentation produces NAD+.
1. Affinity between an enzyme and a substrate will only affect reactions rates at _______ substrate...
41. An enzyme-substrate complex forms when substrate binds to an enzyme at the enzyme's site. 42. An inorganic ion such as zinc or manganese that is needed for an enzyme to function is acting as a 43. Competitive inhibition of enzymes occurs when: site A) catalytic B) allosterie C) operative B) cofactor C) apoenzyme D) holoenzyme A) coenzyme A) the inhibitor binds to the active site of the enzyme B) the inhibitor binds to the allosteric site of the enzyme...
Louis Pasteur observed that when oxygen is introduced to cells consuming glucose at a high rate in an anaerobic environment, fermentation ceases and the rate of glucose consumption decreases. This phenomenon is called the Pasteur effect. The basis of this effect is the shift from fermentation to oxidative phosphorylation to regenerate NAD*. Additionally, the cells also synthesize ATP through oxidative phosphorylation. In respiration-deficient yeast mutants that lack cytochrome oxidase, the Pasteur effect is not seen. Select the reasons why the...
6. The active site A. is located on an enzyme. B. is rich in amino acids. C. is located on a substrate. D. A. and B. E. B. and C. 9. Which of the following molecules is the oxidizing agent in cellular respiration? A. H2O B. Glucose C.O2 D. CO2 10. The substrate for glycolysis is A. Glucose. B. Acetyl-coA. C. Pyruvate D. NADH 12.Which of the following is a product of glycolysis? A. FADH2 B. CO2 C. GTP D....
is required to accept electron 17. At the very end of the electron transport chain in the mitochondria, final electron acceptor. A. carbon dioxide B. ADP C. ATP Synthase Doxygen E. NAD+ 18. Select the correct flow of energy transfer during cellular respiration. A. NADHH gradient glucose → ATP B glucose → NADH H gradient ATP C. glucose H gradient → NADH ATP D. glucose ATPH gradient → NADH 19. If a muscle cell has low levels of oxygen, which...
In an anaerobic environment, the main function of alcoholic fermentation is (justify your answer a. Produce amino acids for protein synthesis b. Generate a proton gradient for the synthesis of ATP c. Oxidize glucose molecules to generate reduced electron carriers d. Generate alcohol and acetaldehyde e. Regenerate NAD from NADH so that glycolysis can continue
Match the term to the correct description. Choices may only be used once. Group of answer choices [ Choose ] An inhibitor molecule binds to the active site. Part of an enzyme where the substrate binds to Protein molecules that function as biological catalysts An inhibitor molecule binds to an allosteric site and prevents the substrate from binding to the active site. A substance...
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Select all that apply. Identify the reaction(s) of glycolysis inhibited by ATP □ glyceraldehyde-3-phosphate → 1,3-bisphosphoglycerate phosphoenolpyruvate +pyruvate 3-phosphoglycerate ~2-phosphoglycerate 1) fructose-6-phosphate→ fructose-1,6-bisphosphate . glucose glucose-6-phosphate Select all that apply. Alcohol fermentation: consumes ATP as it produces ethanol. O produces carbon dioxide begins as pyruvate is decarboxylated to acetaldehyde in a reaction catalyzed by alcohol dehydrogenase m regenerates NAD requires the enzyme alcohol dehydrogenase, In the figure below, what is the reaction occurring at the location...
40.Fatty acid synthase is an enzyme in the lipid metabolism pathway, that: A. occurs in the mitochondrion in animal cells, 2 nor Section A B. utilises NADH as an electron donor C) requires NADPH as a substrate. D. requires acetic acid as a substrate. E. consists of a single multifunctional protein in plants and bacteria. 41.One round of beta oxidation produces 1 molecule of acetyl-CoA from a saturated Acyl-CoA molecule. Which reducing equivalents are made in this process in which...
26. Based on our discussion in class, high levels of NADH would likely A. cause pellagra B. stimulate glycolysis C. slow down the movement of molecules through the citric acid cycle D. slow down oxidative phosphorylation E. break down carbohydrates 27. What purpose does fermentation serve? A. It regenerates NAD* from NADH to keep glycolysis going in the absence of oxygen. B. It allows for the production of NADH, which keeps the electron transport chain going. C. It produces an...
Which one of the following statements about gluconeogenesis is false? A. For starting materials, it can use carbon skeletons derived from certain amino acids. B. It consists entirely of the reactions of glycolysis, operating in the reverse direction. C. It employs the enzyme glucose 6-phosphatase. D. It is one of the ways that mammals maintain normal blood glucose levels between meals. E. It requires metabolic energy (ATP or GTP). The steps of glycolysis between glyceraldehyde 3-phosphate and 3-phosphoglycerate involve all...