Question 1

A phosphate group is transferred from an organic compound to ADP during

Accepted Answer

A)  oxidative phosphorylation. 
B)  substrate-level phosphorylation. 
C)  beta-oxidation. 
D)  photophosphorylation. 
E)  anabolic reactions. 
A)  oxidative phosphorylation. 
B)  substrate-level phosphorylation. 
C)  beta-oxidation. 
D)  photophosphorylation. 
E)  anabolic reactions.

Question 2

Which of the following statements concerning enzymes is FALSE?

Accepted Answer

A)  They are usually, but not always, proteins. 
B)  They always function best at 37°C. 
C)  They can be denatured if the pH of their environment is too high or too low. 
D)  They form a temporary intermediate compound with a substrate. 
E)  They can be used to catalyze a chemical reaction over and over again. 
A)  They are usually, but not always, proteins. 
B)  They always function best at 37°C. 
C)  They can be denatured if the pH of their environment is too high or too low. 
D)  They form a temporary intermediate compound with a substrate. 
E)  They can be used to catalyze a chemical reaction over and over again.

Question 3

During the synthesis of acetyl-CoA from pyruvic acid,________ is produced.

Accepted Answer

A)  ATP 
B)  NADH 
C)  FADH2 
D)  H2O 
E)  acetic acid 
A)  ATP 
B)  NADH 
C)  FADH2 
D)  H2O 
E)  acetic acid

Question 4

The conversion of amino acids to carbohydrates is an example of

Accepted Answer

A)  amination. 
B)  gluconeogenesis. 
C)  substrate-level phosphorylation. 
D)  beta-oxidation. 
E)  electron transport. 
A)  amination. 
B)  gluconeogenesis. 
C)  substrate-level phosphorylation. 
D)  beta-oxidation. 
E)  electron transport.

Question 5

Identify the processes of glucose metabolism represented in Figure 5.1.

Accepted Answer

A)  A = electron transport chain, B = Krebs cycle, C = glycolysis, D = fermentation 
B)  A = glycolysis, B = fermentation, C = Krebs cycle, D = electron transport chain 
C)  A = fermentation, B = glycolysis, C = Krebs cycle, D = electron transport chain 
D)  A = glycolysis, B = Krebs cycle, C = fermentation, D = electron transport chain 
E)  A = glycolysis, B = Krebs cycle, C = electron transport chain, D = fermentation 
A)  A = electron transport chain, B = Krebs cycle, C = glycolysis, D = fermentation 
B)  A = glycolysis, B = fermentation, C = Krebs cycle, D = electron transport chain 
C)  A = fermentation, B = glycolysis, C = Krebs cycle, D = electron transport chain 
D)  A = glycolysis, B = Krebs cycle, C = fermentation, D = electron transport chain 
E)  A = glycolysis, B = Krebs cycle, C = electron transport chain, D = fermentation

Question 6

Beta-oxidation of fatty acids produces a substrate of the

Accepted Answer

A)  pentose phosphate pathway. 
B)  protein synthesis pathways. 
C)  Embden-Meyerhof pathway. 
D)  Krebs cycle. 
E)  Calvin-Benson cycle. 
A)  pentose phosphate pathway. 
B)  protein synthesis pathways. 
C)  Embden-Meyerhof pathway. 
D)  Krebs cycle. 
E)  Calvin-Benson cycle.

Question 7

Another term for a protein catalyst is a(n)(enzyme/ribozyme).

Accepted Answer

The answer of Another term for a protein catalyst is...

Question 8

Cells can use (active/allosteric/substrate)sites to regulate enzyme activity and thereby control their metabolism.

Accepted Answer

The answer of Cells can use (active/allosteric/substrate)sites to regulate enzyme...

Question 9

Pyruvic acid is a product of

Accepted Answer

A)  the Krebs cycle. 
B)  fermentation. 
C)  glycolysis. 
D)  the pentose phosphate pathway. 
E)  both fermentation and the Krebs cycle. 
A)  the Krebs cycle. 
B)  fermentation. 
C)  glycolysis. 
D)  the pentose phosphate pathway. 
E)  both fermentation and the Krebs cycle.

Question 10

Which of the following produces NADPH?

Accepted Answer

A)  the pentose phosphate pathway only 
B)  the Calvin-Benson cycle only 
C)  the Embden-Meyerhof pathway only 
D)  both the Embden-Meyerhof and Calvin-Benson cycle pathways 
E)  both the pentose phosphate and Entner-Doudoroff pathways 
A)  the pentose phosphate pathway only 
B)  the Calvin-Benson cycle only 
C)  the Embden-Meyerhof pathway only 
D)  both the Embden-Meyerhof and Calvin-Benson cycle pathways 
E)  both the pentose phosphate and Entner-Doudoroff pathways

Question 11

If a cell reverses the process of beta-oxidation,which of the following molecules will it make?

Accepted Answer

A)  glycerol 
B)  amino acids 
C)  fatty acids 
D)  nucleotides 
E)  starch 
A)  glycerol 
B)  amino acids 
C)  fatty acids 
D)  nucleotides 
E)  starch

Question 12

Reactions involving ligases are typically ________ reactions.

Accepted Answer

A)  anabolic 
B)  catabolic 
C)  both anabolic and catabolic 
D)  neither anabolic nor catabolic 
E)  exergonic 
A)  anabolic 
B)  catabolic 
C)  both anabolic and catabolic 
D)  neither anabolic nor catabolic 
E)  exergonic

Question 13

Although glycolysis requires an input of ATP,this pathway results in a net gain of two ATP; therefore it is a(n)________ pathway.

Accepted Answer

A)  exergonic 
B)  endergonic 
C)  oxidative 
D)  reductive 
E)  neither exergonic nor endergonic 
A)  exergonic 
B)  endergonic 
C)  oxidative 
D)  reductive 
E)  neither exergonic nor endergonic

Question 14

All the precursors of amino acids are intermediates of glycolytic and fermentation pathways.

Accepted Answer

A) True 
 B)False

Question 15

Bacteriochlorophyll a absorbs ________ light.

Accepted Answer

A)  350 nm, ultraviolet 
B)  425 nm, violet 
C)  660 nm, red 
D)  both 425 & 660 nm (violet and red) 
E)  all visible 
A)  350 nm, ultraviolet 
B)  425 nm, violet 
C)  660 nm, red 
D)  both 425 & 660 nm (violet and red) 
E)  all visible

Question 16

The discussion of carbohydrate catabolism includes some of the many metabolic variations microbes are capable of.Devise a set of biochemical tests to identify the Gram-negative bacteria mentioned.Assume you can detect various organic compounds.Prepare a dichotomous key of your identification scheme.

Accepted Answer

Many answers are possible.Figure 5.3 sho

Question 17

Which of the following is a by-product of the catabolism of proteins?

Accepted Answer

A)  lactic acid 
B)  acetyl-CoA 
C)  proteases 
D)  ammonia 
E)  carbon dioxide 
A)  lactic acid 
B)  acetyl-CoA 
C)  proteases 
D)  ammonia 
E)  carbon dioxide

Question 18

Reactions that are both catabolic and anabolic are amphibolic.

Accepted Answer

A) True 
 B)False

Question 19

Accumulation of a metabolic pathway product may result in decreased activity of the pathway enzymes.

Accepted Answer

A) True 
 B)False

Question 20

The various types of chlorophyll differ in the

Accepted Answer

A)  amount of light they can absorb. 
B)  amount of ATP they produce. 
C)  number of electrons they release. 
D)  amount of oxygen they utilize. 
E)  wavelengths of light they absorb. 
A)  amount of light they can absorb. 
B)  amount of ATP they produce. 
C)  number of electrons they release. 
D)  amount of oxygen they utilize. 
E)  wavelengths of light they absorb.

Exam 5: Microbial Metabolism

A phosphate group is transferred from an organic compound to ADP during

Which of the following statements concerning enzymes is FALSE?

During the synthesis of acetyl-CoA from pyruvic acid,________ is produced.

The conversion of amino acids to carbohydrates is an example of

Identify the processes of glucose metabolism represented in Figure 5.1.

Beta-oxidation of fatty acids produces a substrate of the

Another term for a protein catalyst is a(n)(enzyme/ribozyme).

Cells can use (active/allosteric/substrate)sites to regulate enzyme activity and thereby control their metabolism.

Pyruvic acid is a product of

Which of the following produces NADPH?

If a cell reverses the process of beta-oxidation,which of the following molecules will it make?

Reactions involving ligases are typically ________ reactions.

Although glycolysis requires an input of ATP,this pathway results in a net gain of two ATP; therefore it is a(n)________ pathway.

All the precursors of amino acids are intermediates of glycolytic and fermentation pathways.

Bacteriochlorophyll a absorbs ________ light.

Which of the following is a by-product of the catabolism of proteins?

Reactions that are both catabolic and anabolic are amphibolic.

Accumulation of a metabolic pathway product may result in decreased activity of the pathway enzymes.

The various types of chlorophyll differ in the

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