Question 1

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

Accepted Answer

Oxygen (O$_2$)

Question 2

What is the main purpose of the proton gradient established across the inner mitochondrial membrane?

Accepted Answer

To drive the production of ATP via chemiosmosis

Question 3

Which of the following is a product of glycolysis?

Accepted Answer

Pyruvate

Question 4

How many net ATP molecules are produced from one molecule of glucose during glycolysis?

Accepted Answer

2

Question 5

Which pathway is common to both cellular respiration and fermentation?

Accepted Answer

Glycolysis

Question 6

What is reduced during the process of cellular respiration?

Accepted Answer

Oxygen (O$_2$)

Question 7

Why are carbohydrates and fats considered high-energy foods?

Accepted Answer

They have many electrons associated with hydrogen atoms

Question 8

During fermentation in yeast cells, what is the final product?

Accepted Answer

Ethanol

Question 9

Which molecule is oxidized during glycolysis?

Accepted Answer

Glucose

Question 10

What is the role of NAD$^+$ in cellular respiration?

Accepted Answer

It serves as an electron carrier, accepting electrons during redox reactions

Question 11

Which stage of cellular respiration produces the most ATP?

Accepted Answer

Electron transport chain and chemiosmosis

Question 12

What is the relationship between the wavelength of light and the energy of a photon?

Accepted Answer

Energy decreases as wavelength increases

Question 13

Which process directly uses the energy from the proton gradient to synthesize ATP?

Accepted Answer

Chemiosmosis

Question 14

In photosynthesis, which reaction is responsible for the production of NADPH?

Accepted Answer

Light reactions

Question 15

What is the main function of Acetyl CoA in cellular respiration?

Accepted Answer

It enters the citric acid cycle to facilitate energy production

Question 16

Which of the following best describes a redox reaction?

Accepted Answer

A reaction involving both reduction and oxidation

Question 17

Where are electron carriers such as NADH and FADH$_2$ produced during cellular respiration?

Accepted Answer

During glycolysis and the citric acid cycle

Question 18

If a cell is deprived of oxygen, which process will continue to function?

Accepted Answer

Glycolysis

Question 19

What is the total number of ATP molecules produced from one molecule of glucose during aerobic cellular respiration (including glycolysis, citric acid cycle, and electron transport chain)?

Accepted Answer

36-38

Question 20

Which of the following is true about the Calvin cycle?

Accepted Answer

It is responsible for carbon fixation in photosynthesis

Cellular Energy: Respiration and Photosynthesis Study Guide

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