$$\mathrm{C_6H_{12}O_6$} + 6\mathrm{O_2$} \rightarrow 6\mathrm{CO_2$} + 6\mathrm{H_2O} + \text{ATP}$$

Question 1

Which of the following best describes the overall chemical equation for cellular respiration?

Accepted Answer

$$\mathrm{C_6H_{12}O_6$} + 6\mathrm{O_2$} ightarrow 6\mathrm{CO_2$} + 6\mathrm{H_2O} + 	ext{ATP}$$

Question 2

Which step of cellular respiration occurs in the cytoplasm and does not require oxygen?

Accepted Answer

Glycolysis

Question 3

During aerobic respiration, what is the net ATP gain from glycolysis per glucose molecule?

Accepted Answer

$$2$$ ATP

Question 4

Which molecule acts as the final electron acceptor in the electron transport chain?

Accepted Answer

Oxygen ($$\mathrm{O_2$})$$

Question 5

What is the main purpose of fermentation in cells?

Accepted Answer

To regenerate NAD$$^+$$ for glycolysis

Question 6

Which of the following is a product of lactic acid fermentation?

Accepted Answer

Lactate

Question 7

In the Krebs cycle, which molecule combines with acetyl-CoA to form citrate?

Accepted Answer

Oxaloacetate

Question 8

Which process directly produces the most ATP during cellular respiration?

Accepted Answer

Electron Transport Chain (ETC)

Question 9

What is the total theoretical ATP yield per glucose molecule in aerobic respiration?

Accepted Answer

$$38$$ ATP

Question 10

Which of the following statements about autotrophs is correct?

Accepted Answer

They produce their own food using photosynthesis.

Question 11

Which electron carrier is reduced during glycolysis?

Accepted Answer

NAD$$^+$$

Question 12

What is the role of ATP synthase in cellular respiration?

Accepted Answer

It synthesizes ATP using the proton motive force.

Question 13

Which step of cellular respiration produces carbon dioxide ($$\mathrm{CO_2$}$$)?

Accepted Answer

Krebs Cycle

Question 14

A patient is experiencing muscle fatigue during intense exercise. Which process is most likely occurring in their muscle cells?

Accepted Answer

Lactic acid fermentation

Question 15

Which of the following is NOT a product of the Krebs cycle per glucose molecule?

Accepted Answer

Glucose

Question 16

What is the main difference between aerobic and anaerobic respiration?

Accepted Answer

Aerobic respiration requires oxygen, while anaerobic does not.

Question 17

Which of the following best explains why cells need to regenerate NAD$$^+$$ during fermentation?

Accepted Answer

To allow glycolysis to continue producing ATP.

Question 18

During oxidative phosphorylation, what drives the synthesis of ATP?

Accepted Answer

Flow of protons through ATP synthase

Question 19

Which of the following is a correct sequence of events in cellular respiration?

Accepted Answer

Glycolysis $$\rightarrow$$ Krebs Cycle $$\rightarrow$$ Electron Transport Chain

Question 20

A yeast cell is placed in an anaerobic environment. Which product will it most likely produce?

Accepted Answer

Ethanol

Cellular Respiration: Comprehensive Study Guide

Study Guide - Practice Questions