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

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

Question 1

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

Accepted Answer

$$C_6H_{12}O_6$ + 6O_2 ightarrow 6CO_2 + 6H_2O + 	ext{Energy}$$

Question 2

During cellular respiration, which molecule is oxidized and which is reduced?

Accepted Answer

Glucose is oxidized; oxygen is reduced.

Question 3

Which of the following best explains why cellular respiration is considered a series of redox reactions?

Accepted Answer

Because electrons are transferred from glucose to oxygen.

Question 4

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

Accepted Answer

They carry electrons to the electron transport chain.

Question 5

Which process produces ATP by directly transferring a phosphate group from a substrate to ADP?

Accepted Answer

Substrate-level phosphorylation

Question 6

In the context of OILRIG, what does 'oxidation' refer to?

Accepted Answer

The loss of electrons

Question 7

Which of the following is a correct comparison between combustion and cellular respiration?

Accepted Answer

Combustion releases energy rapidly as heat, while cellular respiration releases energy gradually and stores it as ATP.

Question 8

Which of the following best describes the relationship between photosynthesis and cellular respiration?

Accepted Answer

Photosynthesis stores energy in glucose, while respiration releases energy from glucose.

Question 9

During glycolysis, what is the net gain of ATP and NADH per molecule of glucose?

Accepted Answer

2 ATP and 2 NADH

Question 10

A runner is sprinting and their muscles begin to fatigue due to lack of oxygen. Which metabolic pathway is most likely being used to generate ATP in their muscle cells?

Accepted Answer

Fermentation

Question 11

Which of the following statements about electron carriers is correct?

Accepted Answer

NADH and FADH$$_2$$ donate electrons to the electron transport chain.

Question 12

Which of the following best explains why ATP is considered the energy currency of the cell?

Accepted Answer

It stores energy in its phosphate bonds, which can be easily broken to release energy for cellular work.

Question 13

If a cell is unable to regenerate NAD$$^+$$ during glycolysis, what will most likely happen?

Accepted Answer

Glycolysis will stop because NAD$$^+ is $$required to accept electrons.

Question 14

Which of the following is a direct product of glycolysis?

Accepted Answer

Pyruvate

Question 15

In the context of cellular respiration, what is the main purpose of the electron transport chain?

Accepted Answer

To create a proton gradient that drives ATP synthesis

Question 16

Which of the following best describes substrate-level phosphorylation?

Accepted Answer

ATP is produced by transferring a phosphate group from a high-energy substrate to ADP.

Question 17

A patient has a genetic defect that prevents the formation of a proton gradient across the inner mitochondrial membrane. Which process will be directly affected?

Accepted Answer

Oxidative phosphorylation

Question 18

Which of the following is NOT a product of aerobic cellular respiration?

Accepted Answer

O$$_2$$

Question 19

Which of the following statements about fermentation is correct?

Accepted Answer

Fermentation allows glycolysis to continue by regenerating NAD$$^+.$$

Question 20

Which of the following best explains why controlled combustion in cells is advantageous compared to uncontrolled combustion?

Accepted Answer

Controlled combustion allows energy to be released gradually and stored as ATP, minimizing heat loss.

Metabolic Pathways: Respiration and Fermentation (Chapter 9) – Study Notes

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