Question 1

Which of the following is not true of anaerobic respiration? v: 05_22_2015_QC_CS-15256

Accepted Answer

A) involves glycolysis 
B) generates some ATP 
C) utilizes an electron transport system 
D) uses the same final electron acceptors as aerobic respiration

Question 2

All of the following pertain to glycolysis EXCEPT

Accepted Answer

A) occurs without oxygen. 
B) ends with formation of pyruvic acid. 
C) occurs during fermentation. 
D) degrades glucose to CO2 and H2O. 
E) involves reduction of NAD.

Question 3

Which of the following are not photosynthetic pigments?

Accepted Answer

A) carotenoids 
B) leukophylls 
C) phycobilins 
D) chlorophylls 
E) All of these choices are correct.

Question 4

The best way to control a metabolic pathway is to control the fastest enzyme in the series.

Accepted Answer

A) True 
 B)False

Question 5

Mixed acid fermentation

Accepted Answer

A) produces butyric acid. 
B) occurs in all bacteria. 
C) produces several different acids plus CO2 and H2 gases. 
D) is seen in Streptococcus and Lactobacillus. 
E) also produces ethanol.

Question 6

FAD, NADP, and NAD are all _____ carriers.

Accepted Answer

A) hydrogen 
B) electron 
C) ATP 
D) both hydrogen and electron

Question 7

Which of the following is not involved in the step that occurs between glycolysis and the Krebs cycle?

Accepted Answer

A) reduction of NAD 
B) decarboxylation of pyruvic acid 
C) Coenzyme A attaches to an acetyl group 
D) dehydrogenation of pyruvic acid 
E) pyruvic acid accepts electrons from NADH

Question 8

Enzymes that are only produced when substrate is present are termed

Accepted Answer

A) exoenzymes. 
B) endoenzymes. 
C) constitutive enzymes. 
D) induced enzymes. 
E) conjugated enzymes.

Question 9

An oxidase detection test can be used to identify certain bacteria because they lack

Accepted Answer

A) Cytochrome c oxidase. 
B) NAD. 
C) mitochondria. 
D) ATP synthase. 
E) Coenzyme Q.

Question 10

Enzymes that are always present, regardless of the amount of substrate are

Accepted Answer

A) apoenzymes. 
B) axoenzymes. 
C) constitutive enzymes. 
D) regulated enzymes. 
E) endoenzymes.

Question 11

Most electron carriers are

Accepted Answer

A) coenzymes. 
B) enzymes. 
C) hydrogens. 
D) inorganic phosphate. 
E) All of these choices are correct.

Question 12

What chemical causes death in many eukaryotes because it blocks Cytochrome c oxidase?

Accepted Answer

A) copper 
B) iron 
C) cyanide 
D) oxygen 
E) carbon monoxide

Question 13

The cell's metabolic reactions involve the participation of _____ that lower the activation energy needed for the initiation of a reaction.

Accepted Answer

A) cofactors 
B) vitamins 
C) enzymes 
D) ATP 
E) Coenzymes

Question 14

In which stage of aerobic respiration is water produced?

Accepted Answer

A) glycolysis 
B) Krebs cycle 
C) electron transport system

Question 15

The step involving ATP, hexokinase and the phosphorylation of glucose to glucose-6-phosphate is

Accepted Answer

A) the final step of the Krebs cycle. 
B) the first redox reaction of the electron transport system. 
C) an example of oxidative phosphorylation. 
D) an example of substrate-level phosphorylation. 
E) an example of photophosphorylation.

Question 16

Reactants are converted to products by

Accepted Answer

A) enzymes releasing energy. 
B) breaking and forming bonds. 
C) enzymes binding to reactants. 
D) reactants releasing energy.

Question 17

Exergonic reactions

Accepted Answer

A) include synthesis of large carbohydrates. 
B) only occur in heterotrophs. 
C) occur during aerobic cellular respiration. 
D) do not occur in anaerobic cellular respiration. 
E) occur when ADP binds to inorganic phosphate to form ATP.

Question 18

Hydrolysis reactions are catabolic reactions that use water to split the reactant into smaller subunits.

Accepted Answer

A) True 
 B)False

Question 19

As the electron transport carriers shuttle electrons, they actively pump _____ into the outer membrane compartment setting up a concentration gradient called the proton motive force.

Accepted Answer

A) ATP 
B) phosphate 
C) hydrogen ions 
D) oxygen 
E) NADH

Question 20

Only yeast produces alcohol as a fermentation product.

Accepted Answer

A) True 
 B)False

Exam 8: An Introduction to Microbial Metabolism: the Chemical Crossroads of Life

Which of the following is not true of anaerobic respiration? v: 05_22_2015_QC_CS-15256

All of the following pertain to glycolysis EXCEPT

Which of the following are not photosynthetic pigments?

The best way to control a metabolic pathway is to control the fastest enzyme in the series.

Mixed acid fermentation

FAD, NADP, and NAD are all _____ carriers.

Which of the following is not involved in the step that occurs between glycolysis and the Krebs cycle?

Enzymes that are only produced when substrate is present are termed

An oxidase detection test can be used to identify certain bacteria because they lack

Enzymes that are always present, regardless of the amount of substrate are

Most electron carriers are

What chemical causes death in many eukaryotes because it blocks Cytochrome c oxidase?

The cell's metabolic reactions involve the participation of _____ that lower the activation energy needed for the initiation of a reaction.

In which stage of aerobic respiration is water produced?

The step involving ATP, hexokinase and the phosphorylation of glucose to glucose-6-phosphate is

Reactants are converted to products by

Exergonic reactions

Hydrolysis reactions are catabolic reactions that use water to split the reactant into smaller subunits.

As the electron transport carriers shuttle electrons, they actively pump _____ into the outer membrane compartment setting up a concentration gradient called the proton motive force.

Only yeast produces alcohol as a fermentation product.