FREE AND STUDY GAMES ABOUT BIO CH 9 QUESTIONS

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FREE AND STUDY GAMES ABOUT BIO CH 9 QUESTIONS

EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -74 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: Why does the oxidation of organic compounds by molecular oxygen to

produce CO2 and water release free energy?

Answer:

electrons are being moved from atoms that have a lower affinity for electrons (such as

• to atoms with a higher affinity for electrons (such as O)

Question 2: When glucose ??? is oxidized to CO2 and water in cellular respiration, approximately 40% of the energy content of glucose is transferred to

Answer:

ATP (adenosine triphosphate).Question 3: Which of the following is a true distinction between fermentation and cellular respiration?

Answer:

NADH is oxidized by the electron transport chain in respiration only

Question 4: Which kind of metabolic poison would most directly interfere with glycolysis?

Answer:

An agent that closely mimics the structure of glucose but is not metabolized Question 5: An organism consumes a lot of sugar, yet doesnt gain weight when denied air. The consumption of sugar increases as air is removed from its environment, but the organism seems to thrive even when no air. When in normal air, the organism is fine. describe.

Answer:

It is a facultative anaerobe Question 6: Which process in eukaryotic cells will proceed normally whether oxygen ??? is present or absent?

Answer:

glycolysis Question 7: which of the following organic molecules CANNOT be converted to an intermediate of glycolysis?

Answer:

fatty acids Question 8: The direct energy source that drives ATP synthesis during respiratory oxidative phosphorylation is

Answer:

the difference in concentrations on opposite sides of the inner mitochondrial memebrane Question 9: Carbon skeletons for amino acid biosynthesis are supplied by intermediates of the citric acid cycle. Which intermediate would supply the carbon skeleton for synthesis of a five-carbon amino acid?

Answer:

?-ketoglutarate Question 10: Starting with citrate, how many of the following would be produced with three turns of the citric acid cycle?

Answer:

• ATP, 6 C , 9 NADH, and 3 FADH2

Question 11: In mitochondria, exergonic redox reactions

Answer:

provide the energy to establish the proton gradient

Question 12: most of the energy that enters electron transport enters as

Answer:

???? and NADH Question 13: It is possible to prepare vesicles from portions of the inner membrane of the mitochondrial components. Which one of the following processes could still be carried on by this isolated inner membrane?

Answer:

oxidative phosphorylation Question 14: What is the term used for the metabolic pathway in which glucose ( ) is degraded to carbon dioxide (C ) and water?

Answer:

cellular respiration

Question 15: Cells do not catabolize carbon dioxide because

Answer:

CO2 is already completely oxidized Question 16: Glycolysis is thought to be one of the most ancient of metabolic processes. Which statement supports this idea?

Answer:

Glycolysis is the most widespread metabolic pathway Question 17: In the presence of oxygen, the three-carbon compound pyruvate can be catabolized in the citric acid cycle. These three steps result in the formation of

Answer:

acetyl CoA, NADH, , and C

Question 18: Where do the catabolic products of fatty acid breakdown enter into the citric acid cycle?

Answer:

acetyl CoA Question 19: Which statement is not correct with regard to redox (oxidation-reduction) reactions?

Answer:

a molecule is reduced if it loses electrons Question 20: During aerobic respiration, electrons travel downhill in which sequence?

Answer:

food ? NADH ? electron transport chain ? oxygen Question 21: In the absence of oxygen, yeast cells can obtain energy by fermentation, resulting in the production of

Answer:

ATP, C , and ethanol (ethyl alcohol).

Question 22: In glycolysis, for each molecule of glucose oxidized to pyruvate

Answer:

• molecules of ATP are used and 4 molecules of ATP are produced

Question 23: Where does glycolysis takes place?

Answer:

cytosol Question 24: During oxidative phosphorylation, O is formed. Where does the oxygen for the synthesis of the water come from?

Answer:

molecular oxygen(O2)

Question 25: What is the reducing agent in the following reaction?

Answer:

NADH