Question 1

Which of the following best describes what happens to glucose during aerobic cellular respiration?

Accepted Answer

Glucose is oxidized to form carbon dioxide.

Question 2

In the overall equation for aerobic cellular respiration, which molecule acts as the final electron acceptor?

Accepted Answer

Oxygen ($$O_2)$$

Question 3

Which of the following statements about redox reactions is correct?

Accepted Answer

Oxidation is the loss of electrons, and reduction is the gain of electrons.

Question 4

During glycolysis, what are the net products generated from one molecule of glucose?

Accepted Answer

2 NADH, 2 pyruvate, and 2 ATP

Question 5

Which process is responsible for the largest production of ATP during aerobic cellular respiration?

Accepted Answer

Oxidative phosphorylation during the electron transport chain and chemiosmosis

Question 6

Where in the cell does glycolysis occur?

Accepted Answer

Cytoplasm

Question 7

Which of the following is a by-product of aerobic cellular respiration?

Accepted Answer

Water ($$H_2O)$$

Question 8

What is the main function of NADH and FADH$$_2 in $$cellular respiration?

Accepted Answer

They carry electrons to the electron transport chain.

Question 9

Which of the following steps of aerobic cellular respiration does NOT require oxygen directly?

Accepted Answer

Glycolysis

Question 10

What is the correct order of the stages of aerobic cellular respiration?

Accepted Answer

Glycolysis, pyruvate oxidation, Krebs cycle, electron transport chain & chemiosmosis

Question 11

Which of the following best explains why oxygen is essential for aerobic cellular respiration?

Accepted Answer

Oxygen is the final electron acceptor in the electron transport chain.

Question 12

During which stages of aerobic cellular respiration does substrate-level phosphorylation occur?

Accepted Answer

Glycolysis and Krebs cycle

Question 13

Which of the following is a product of pyruvate oxidation?

Accepted Answer

Acetyl CoA, NADH, and CO$$_2$$

Question 14

How many turns of the Krebs cycle are required to completely oxidize one molecule of glucose?

Accepted Answer

2

Question 15

Which molecule is regenerated at the end of the Krebs cycle and is also used as a reactant in the first step?

Accepted Answer

Oxaloacetate

Question 16

What is the main role of the electron transport chain in cellular respiration?

Accepted Answer

To harness energy from high-energy electrons to create a proton gradient

Question 17

Chemiosmotic creation of ATP is driven by:

Accepted Answer

Potential energy of the H$$^+$$ concentration gradient created by the electron transport chain

Question 18

What is the approximate total number of ATP molecules produced from the complete oxidation of one molecule of glucose during aerobic cellular respiration?

Accepted Answer

30-38

Question 19

Which of the following best describes the primary function of fermentation?

Accepted Answer

To recycle NADH to NAD$$^+$$ for glycolysis

Question 20

Which of the following statements about NAD$$^+ is $$true?

Accepted Answer

NAD$$^+ is $$reduced to NADH during glycolysis, pyruvate oxidation, and the Krebs cycle.

Cellular Respiration and Fermentation: Structured Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards