Question 1

Which of the following best describes the process of fermentation in human cells?

Accepted Answer

It produces ATP in an anaerobic environment and results in lactic acid as a byproduct.

Question 2

Which statement correctly explains why fermentation is less efficient than aerobic respiration?

Accepted Answer

Fermentation results in the buildup of lactic acid, which is the only carbon source available.

Question 3

Which of the following is an example of a catabolic reaction?

Accepted Answer

Breaking down molecules during digestion.

Question 4

During cellular respiration, which molecule acts as the final electron acceptor in the electron transport chain (ETC)?

Accepted Answer

Oxygen ($$O_2)$$

Question 5

Which process occurs in the cytoplasm and produces pyruvic acid from glucose?

Accepted Answer

Glycolysis

Question 6

What is the main function of ATP in anabolic reactions?

Accepted Answer

To put simpler molecules together to form complex molecules.

Question 7

Which statement best describes the role of NAD+ in cellular respiration?

Accepted Answer

NAD+ is reduced to NADH by gaining electrons during glycolysis and the Krebs Cycle.

Question 8

Which equation correctly represents the oxidation of glucose during cellular respiration?

Accepted Answer

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

Question 9

Why is the potential maximum amount of ATP never reached during cellular respiration?

Accepted Answer

Some protons do not pass through ATP synthase and instead leak across the mitochondrial membrane.

Question 10

Which of the following best describes substrate-level phosphorylation?

Accepted Answer

ATP is produced directly by transferring a phosphate group from a substrate to ADP.

Question 11

A patient is experiencing muscle fatigue due to lactic acid buildup. Which metabolic pathway is most likely responsible?

Accepted Answer

Fermentation in the cytoplasm

Question 12

Which of the following statements about the Krebs Cycle is correct?

Accepted Answer

It occurs in the mitochondrial matrix and produces $$CO_2 as a $$byproduct.

Question 13

Which molecule is produced during glycolysis and then used in the Krebs Cycle?

Accepted Answer

Pyruvic acid

Question 14

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

Accepted Answer

Electron Transport Chain (ETC)

Question 15

Which of the following is a correct description of oxidation and reduction?

Accepted Answer

Oxidation is a loss of electrons; reduction is a gain of electrons.

Question 16

Which pathway correctly describes the flow of electrons during cellular respiration?

Accepted Answer

Glycolysis $$\rightarrow$$ Krebs Cycle $$\rightarrow$$ ETC

Question 17

Which of the following molecules is NOT directly involved in the production of ATP through redox reactions?

Accepted Answer

Lactic acid

Question 18

A cell is observed to have a high rate of substrate-level phosphorylation but a low rate of oxidative phosphorylation. Which condition is most likely present?

Accepted Answer

Anaerobic environment

Question 19

Which statement best explains why protons leaking across the mitochondrial membrane affects ATP production?

Accepted Answer

Leaked protons bypass ATP synthase, reducing the proton gradient and decreasing ATP yield.

Question 20

Which of the following is true regarding the location of glycolysis and the Krebs Cycle?

Accepted Answer

Glycolysis occurs in the cytoplasm; Krebs Cycle occurs in the mitochondrial matrix.

Cellular Respiration, Metabolism, and ATP Production: Study Notes for Anatomy & Physiology

Guida di studio - Domande di pratica

Study guide - Flashcard