Question 1

Which of the following best describes a redox reaction in cellular respiration?

Accepted Answer

A reaction where electrons are transferred from one molecule to another.

Question 2

During aerobic cellular respiration, which molecule is oxidized and which is reduced in the overall reaction $$\mathrm{C_6H_{12}O_6$ + 6 O_2$ \rightarrow 6 CO_2$ + 6 H_2O + Energy}$$?

Accepted Answer

C$$_6H$_{12}O$_6 is $$oxidized and O$$_2 is $$reduced.

Question 3

Which of the following is a by-product of cellular respiration?

Accepted Answer

Water

Question 4

What is the primary function of NADH and FADH$$_2 in $$cellular respiration?

Accepted Answer

They act as electron carriers, transporting electrons to the electron transport chain.

Question 5

Which of the following lists the stages of aerobic cellular respiration in the correct order?

Accepted Answer

Glycolysis, pyruvate oxidation, Krebs cycle, and electron transport chain & chemiosmosis.

Question 6

Where does glycolysis occur within a cell?

Accepted Answer

Cytoplasm

Question 7

How many ATP molecules are invested in the energy investment phase of glycolysis?

Accepted Answer

Two

Question 8

Starting with one molecule of glucose, glycolysis results in the net production of which of the following sets of energy-containing products?

Accepted Answer

2 NADH, 2 pyruvate, and 2 ATP

Question 9

Which of the following is a result of glycolysis?

Accepted Answer

Conversion of one glucose molecule to two pyruvate molecules.

Question 10

Which of the following describes the products of pyruvate oxidation per one glucose molecule?

Accepted Answer

Acetyl CoA, NADH, and CO$$_2$$

Question 11

How many turns of the Krebs cycle are needed to completely break down one molecule of glucose?

Accepted Answer

2

Question 12

Which product of the Krebs cycle is also used as a reactant in the Krebs cycle?

Accepted Answer

Oxaloacetate

Question 13

Taking one molecule of glucose through glycolysis, pyruvate oxidation, and the Krebs cycle generates:

Accepted Answer

6 CO$$_2$$, 10 NADH, 2 FADH$$_2$$ and 4 ATP

Question 14

In the electron transport chain, what is the final electron acceptor?

Accepted Answer

O$$_2$$

Question 15

Chemiosmotic creation of ATP is driven by:

Accepted Answer

Potential energy of the H$$^+$$ concentration gradient created by the electron transport chain.

Question 16

Fermentation allows a cell to:

Accepted Answer

Recycle NADH to NAD+ for glycolysis.

Question 17

Which of the following describes a primary function of both lactic acid fermentation and alcohol fermentation?

Accepted Answer

Oxidation of NADH to NAD+

Question 18

Approximately how many molecules of ATP are produced from the complete oxidation of one molecule of glucose through aerobic cellular respiration?

Accepted Answer

30-38

Question 19

Which type of phosphorylation synthesizes ATP using an enzyme that transfers a phosphate group to ADP?

Accepted Answer

Substrate-level Phosphorylation

Question 20

In which steps of aerobic cellular respiration does substrate-level phosphorylation occur?

Accepted Answer

Glycolysis and Krebs cycle

Cellular Respiration and Fermentation: Mechanisms of Energy Harvest in Cells

Study Guide - Practice Questions

Study Guide - Flashcards