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

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

Question 1

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

Accepted Answer

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

Question 2

During glycolysis, how many net ATP molecules are produced per molecule of glucose?

Accepted Answer

$$2$$

Question 3

Which molecule acts as the final electron acceptor in aerobic cellular respiration?

Accepted Answer

$$O_2$$

Question 4

What is the primary purpose of fermentation in cells?

Accepted Answer

To regenerate $$NAD^+$$ for glycolysis

Question 5

Which process directly produces the most ATP during cellular respiration?

Accepted Answer

Oxidative phosphorylation

Question 6

In the electron transport chain, what is the main role of NADH and FADH$$_2$$?

Accepted Answer

They donate electrons to the chain, powering ATP production

Question 7

Which of the following statements about substrate-level phosphorylation is correct?

Accepted Answer

It directly transfers a phosphate group to ADP from a substrate

Question 8

Why does the citric acid cycle turn twice for each molecule of glucose?

Accepted Answer

Because two molecules of pyruvate are produced from one glucose

Question 9

Which of the following is a correct description of chemiosmosis?

Accepted Answer

The use of a proton gradient to drive ATP synthesis

Question 10

A muscle cell is deprived of oxygen but continues to contract. Which process is most likely providing ATP?

Accepted Answer

Lactic acid fermentation

Question 11

Which of the following is true about the energy efficiency of cellular respiration?

Accepted Answer

About 34% of the energy in glucose is transferred to ATP

Question 12

Which of the following is NOT a product of the citric acid cycle?

Accepted Answer

$$O_2$$

Question 13

What is the role of ATP synthase in cellular respiration?

Accepted Answer

It synthesizes ATP as protons flow through it

Question 14

Which statement best explains why photosynthesis is considered an anabolic process?

Accepted Answer

It builds complex organic molecules from simpler ones

Question 15

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

Accepted Answer

Glucose $$\rightarrow$$ NADH $$\rightarrow$$ Electron transport chain $$\rightarrow$$ Proton-motive force $$\rightarrow$$ ATP

Question 16

Which of the following organisms can survive using either fermentation or cellular respiration?

Accepted Answer

Facultative anaerobes

Question 17

During the oxidation of glucose in cellular respiration, which molecule is reduced?

Accepted Answer

Oxygen

Question 18

Which of the following is a correct description of an oxidation-reduction (redox) reaction?

Accepted Answer

Oxidation is the loss of electrons; reduction is the gain of electrons

Question 19

In alcohol fermentation, what is the fate of pyruvate?

Accepted Answer

It is converted to ethanol and $$CO_2$$

Question 20

A patient is diagnosed with a mitochondrial disorder that impairs the electron transport chain. Which process would still allow their cells to produce ATP?

Accepted Answer

Fermentation

Cellular Respiration & Fermentation: Key Concepts and Processes

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