FREE AND STUDY GAMES ABOUT CHAP 9 QUIZ EXAM

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FREE AND STUDY GAMES ABOUT CHAP 9 QUIZ EXAM

QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -47 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: Which process is the one in which glucose is oxidized to generate two molecules of pyruvate, and in which ATP and NADH are produced?

Answer:

Glycolysis Question 2: In an experiment, mice were fed glucose (C6H12O6) containing a small amount of radioactive oxygen. The mice were closely monitored, and after a few minutes radioactive oxygen atoms showed up in _____.

Answer:

Carbon dioxide Question 3: During respiration in eukaryotic cells, the electron transport chain is located in or on the _____

Answer:

Inner membrane of the mitochondria

Question 4: A small amount of ATP is made in glycolysis by which of the following processes?

Answer:

transfer of a phosphate group from a fragment of glucose to ADP by substrate-level phosphorylation Question 5: Which part of the catabolism of glucose by cellular respiration requires molecular oxygen (O2) and produces CO2?

Answer:

The combination of the citric acid cycle and electron transport Question 6: The ATP synthase in a human cell obtains energy for synthesizing ATP directly from which of the following processes?

Answer:

the flow of H+ across the inner mitochondrial membrane through the ATP synthase enzyme Question 7: During aerobic respiration, molecular oxygen (O2) is used for which of the following purposes?

Answer:

at the end of the electron transport chain to accept electrons and form H2O Question 8: Which of the following accompanies the conversion of pyruvate to acetyl CoA before the citric acid cycle?

Answer:

release of CO2 and synthesis of NADH

Question 9: Why is the citric acid cycle called a cycle?

Answer:

The four-carbon acid that accepts the acetyl CoA in the first step of the cycle is regenerated by the last step of the cycle Question 10: In the overall process of glycolysis and cellular respiration, _____ is oxidized and _____ is reduced

Answer:

Glucose, Oxygen

Question 11: A molecule becomes more oxidized when it _____

Answer:

Loses an electron Question 12: The energy given up by electrons as they move through the electron transport chain is used in which of the following processes?

Answer:

Pumping H+ across a membrane Question 13: Where do the reactions of the citric acid cycle occur in eukaryotic cells?

Answer:

The mitochondrial matrix Question 14: Most of the ATP produced in cellular respiration comes from which of the following processes

Answer:

Oxidative Phosphorylation Question 15: Which of the following is the source of the energy that produces the chemiosmotic gradient in mitochondria?

Answer:

Electrons moving down the electron transport chain Question 16: Of the metabolic pathways listed below, which is the only pathway found in all organisms?

Answer:

Glycolysis Question 17: The overall efficiency of respiration (the percentage of the energy released that is saved in ATP) is approximately _____.

Answer:

35%

Question 18: When a poison such as cyanide blocks the electron transport chain, glycolysis and the citric acid cycle also eventually stop working. Which of the following is the best explanation for this?

Answer:

NAD+ and FAD are not available for glycolysis and the citric acid cycle to continue Question 19: In glycolysis, there is no production of carbon dioxide as a product of the pathway.Which of the following is the best explanation for this

Answer:

The products of glycolysis contain the same total number of carbon atoms as in the starting material.Question 20: In preparing pyruvate to enter the citric acid cycle, which of the following steps occurs?

Answer:

Pyruvate is oxidized and decarboxylated, and the removed electrons are used to reduce an NAD+ to an NADH Question 21: After completion of the citric acid cycle, most of the usable energy from the original glucose molecule is in the form of _____.

Answer:

NADH, it produces 3 molecules Question 22: In the citric acid cycle, for each pyruvate that enters the cycle, one ATP, three NADH, and one FADH2 are produced. For each glucose molecule that enters glycolysis, how many ATP, NADH, and FADH2 are produced in the citric acid cycle?

Answer:

• ATP, 6 NADH, and 2 FADH2

Question 23: During the reaction C6H12O6 + 6 O2 ? 6 CO2 + 6 H2O, which compound is reduced as a result of the reaction

Answer:

Oxygen Question 24: Which of the following substances is/are involved in oxidative phosphorylation?

Answer:

ADP is converted to ATP during oxidative phosphorylation, and oxygen functions as the terminal electron acceptor in oxidative phosphorylation.