Question 1

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

Accepted Answer

A) True 
 B)False

Question 2

Which of the following is not a process that regenerates ATP?

Accepted Answer

A)   Oxidative phosphorylation
B)   Reductive phosphorylation
C)   Substrate-level phosphorylation
D)   PhotophosphorylationE) A) and B)
F) A) and C)

Question 3

ATP is composed of deoxyribose, adenine, and three phosphate groups.

Accepted Answer

A) True 
 B)False

Question 4

When enzyme action stops due to a buildup of end product that acts as a regulatory molecule, this control is called ______.

Accepted Answer

A)   competitive inhibition
B)   enzyme induction
C)   enzyme repression
D)   noncompetitive inhibitionE) C) and D)
F) B) and D)

Question 5

In which pathway is the most NADH generated?

Accepted Answer

A)   The electron transport system
B)   The Krebs cycle
C)   Glycolysis
D)   Alcoholic fermentation
E)   Mixed acid fermentationF) A) and D)
G) None of the above

Question 6

The light-harvesting units in the thylakoid membranes are the ______.

Accepted Answer

A)   ATP synthases
B)   electrons
C)   grana
D)   photosystems
E)   ATP moleculesF) B) and E)
G) C) and D)

Question 7

Photosynthesis occurs in chloroplasts of prokaryotes.

Accepted Answer

A) True 
 B)False

Question 8

Mixed acid fermentation _______.

Accepted Answer

A)   produces butyric acid
B)   occurs in all bacteria
C)   produces several different acids plus CO? and H2 gases
D)   is seen in Streptococcus and Lactobacillus
E)   also produces ethanolF) C) and D)
G) A) and D)

Question 9

Which of the following characterize the Calvin cycle?

Accepted Answer

A)   A process that requires light
B)   Nitrogen is ?xed into an organic form
C)   Produces glucose as an end product
D)   Produces carbon dioxide and water
E)   Produces oxygenF) D) and E)
G) A) and C)

Question 10

The reactions of fermentation function to produce _______ molecules for further use in glycolysis.

Accepted Answer

A)   pyruvic acid
B)   ATP
C)   NAD+
D)   NADH
E)   glucoseF) B) and E)
G) A) and B)

Question 11

Enzymes that catalyze the removal of electrons from one substrate and the addition of electrons to another are called ______.

Accepted Answer

A)   transferases
B)   oxidoreductases
C)   lyases
D)   isomerases
E)   ligasesF) A) and B)
G) B) and E)

Question 12

Noncompetitive inhibition is best described as _______.

Accepted Answer

A)   the substrate binding to DNA, blocking enzyme transcription
B)   the end product binding to DNA, blocking enzyme transcription
C)   the substrate binding to enzyme in a regulatory site
D)   the end product binding to enzyme in noncompetitive site
E)   an anabolic reactionF) A) and C)
G) D) and E)

Question 13

How many carbon dioxide molecules are produced by the complete aerobic breakdown of one glucose molecule?

Accepted Answer

A)   2
B)   3
C)   4
D)   5
E)   6F) None of the above
G) A) and E)

Question 14

You have a tube of nutrient broth, in which

Accepted Answer

A)   Fermentation
B)   Aerobic respiration
C)   Anaerobic respiration
D)   Photosynthesis
E)   coli is growing. Upon analyzing the broth chemistry, you ?nd:Oxygen content has dropped a bit, but carbon dioxide has gone up a lotFormic, acetic, and lactic acids are presentWhat kind of metabolism has most likely occurred?F) A) and B)
G) C) and D)

Question 15

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 monoxideF) A) and B)
G) B) and E)

Question 16

Important components of coenzymes are _______.

Accepted Answer

A)   vitamins
B)   metallic ions
C)   active sites
D)   substrates
E)   ribozymesF) A) and C)
G) A) and E)

Question 17

The formation of peptide bonds between amino acids to build a polypeptide is an example of ______.

Accepted Answer

A)   anabolism
B)   phosphorylation
C)   fermentation
D)   catabolism
E)   glycolysisF) All of the above
G) B) and C)

Question 18

Which of the following processes is endergonic?

Accepted Answer

A)   Carbon ?xation
B)   Deamination
C)   The oxidation of glucose
D)   Beta oxidation of fatty acids
E)   Burning woodF) A) and E)
G) C) and D)

Question 19

Substrate-level phosphorylation occurs in _______.

Accepted Answer

A)   glycolysis and the electron transport chain
B)   photosynthesis and glycolysis
C)   glycolysis and the Krebs cycle
D)   the Krebs cycle and the electron transport system
E)   the electron transport system onlyF) None of the above
G) D) and E)

Question 20

Which of the following statements is false regarding amphibolic pathways?

Accepted Answer

A)   Metabolic pathways are amphibolic, that is, catabolism and anabolism are intertwined in order to conserve energy in the cell.
B)   Glucose is broken down in glycolysis; however, not all of the intermediates in the pathway are utilized as an energy source. Many leave the pathway to serve as precursors forComplex molecules.
C)   Glyceraldehyde-3-phosphate is used as a precursor for amino acid, lipid, and carbohydrate synthesis.
D)   All organisms use metabolic pathways to synthesize the 20 amino acids necessary for protein synthesis using precursors from catabolic processes.
E)   Glucose is broken down during glycolysis to pyruvate; however, when glucose is in short supply, pyruvate is used as a precursor in the process of gluconeogenesis.F) A) and B)
G) D) and E)

Exam 8: Microbial Metabolism: the Chemical Crossroads of Life

You have a tube of nutrient broth, in which

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Enzymes that catalyze the removal of electrons from one substrate and the addition of electrons to another are called ______.

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Which of the following processes is endergonic?

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Which of the following is not a process that regenerates ATP?

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Which of the following characterize the Calvin cycle?

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How many carbon dioxide molecules are produced by the complete aerobic breakdown of one glucose molecule?

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The light-harvesting units in the thylakoid membranes are the ______.

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Photosynthesis occurs in chloroplasts of prokaryotes.

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The reactions of fermentation function to produce _______ molecules for further use in glycolysis.

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Noncompetitive inhibition is best described as _______.

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Which of the following statements is false regarding amphibolic pathways?

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When enzyme action stops due to a buildup of end product that acts as a regulatory molecule, this control is called ______.

Correct AnswerverifiedShow Answer

The formation of peptide bonds between amino acids to build a polypeptide is an example of ______.

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What chemical causes death in many eukaryotes because it blocks cytochrome C oxidase?

Correct AnswerverifiedShow Answer

In which pathway is the most NADH generated?

Correct AnswerverifiedShow Answer

Substrate-level phosphorylation occurs in _______.

Correct AnswerverifiedShow Answer

ATP is composed of deoxyribose, adenine, and three phosphate groups.

Correct AnswerverifiedShow Answer

Important components of coenzymes are _______.

Correct AnswerverifiedShow Answer

Mixed acid fermentation _______.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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