Question 1

When we shiver on a cold day,the heat produced by muscle tissue is a demonstration of

Accepted Answer

A) radiant potential energy. 
B) the first law of thermodynamics. 
C) the second law of thermodynamics. 
D) the creation of energy. 
A) radiant potential energy. 
B) the first law of thermodynamics. 
C) the second law of thermodynamics. 
D) the creation of energy. C

Question 2

During the citric acid cycle,an acetyl CoA molecule produced in the intermediate stage combines with a molecule of

Accepted Answer

A) oxaloacetic acid. 
B) pyruvate. 
C) citrate. 
D) succinate. 
A) oxaloacetic acid. 
B) pyruvate. 
C) citrate. 
D) succinate. A

Question 3

The first law of thermodynamics states that once energy is consumed,it can no longer be converted to any other form of energy.

Accepted Answer

A) True 
 B)False  False

Question 4

Organic cofactors are referred to as _________.

Accepted Answer

The answer of Organic cofactors are referred to as _________....

Question 5

Which of the following choices lists the order of stages of cellular respiration in proper order

Accepted Answer

A) Glycolysis,intermediate stage,citric acid cycle,and the electron transport system 
B) Citric acid cycle,glycolysis,intermediate stage,and the electron transport system 
C) Glycolysis,citric acid cycle,intermediate stage,and the electron transport system 
D) Glycolysis,intermediate stage,electron transport system,and the citric acid cycle 
E) Citric acid cycle,electron transport chain,intermediate stage,and glycolysis 
A) Glycolysis,intermediate stage,citric acid cycle,and the electron transport system 
B) Citric acid cycle,glycolysis,intermediate stage,and the electron transport system 
C) Glycolysis,citric acid cycle,intermediate stage,and the electron transport system 
D) Glycolysis,intermediate stage,electron transport system,and the citric acid cycle 
E) Citric acid cycle,electron transport chain,intermediate stage,and glycolysis

Question 6

The intermediate stage of cellular respiration

Accepted Answer

A) produces ATP and occurs in the cytosol. 
B) produces carbon dioxide and occurs in the mitochondria. 
C) requires Coenzyme A and occurs in the cytosol. 
D) produces pyruvate and occurs in the mitochondria. 
A) produces ATP and occurs in the cytosol. 
B) produces carbon dioxide and occurs in the mitochondria. 
C) requires Coenzyme A and occurs in the cytosol. 
D) produces pyruvate and occurs in the mitochondria.

Question 7

Which enzyme class splits a chemical bond in the absence of water

Accepted Answer

A) Ligase 
B) Oxidoreductase 
C) Lyase 
D) Hydrolase 
E) Dehydrogenase 
A) Ligase 
B) Oxidoreductase 
C) Lyase 
D) Hydrolase 
E) Dehydrogenase

Question 8

The term "metabolism" refers to

Accepted Answer

A) reactions involving the breakdown of complex molecules into simpler ones. 
B) reactions involving the breakdown of complex molecules or the exchange of atoms between similarly sized reactants. 
C) all the chemical reactions in the body. 
D) reactions involving the synthesis of complex molecules from simpler ones. 
E) digestive system reactions that are either catabolic or exchange reactions. 
A) reactions involving the breakdown of complex molecules into simpler ones. 
B) reactions involving the breakdown of complex molecules or the exchange of atoms between similarly sized reactants. 
C) all the chemical reactions in the body. 
D) reactions involving the synthesis of complex molecules from simpler ones. 
E) digestive system reactions that are either catabolic or exchange reactions.

Question 9

The enzyme DNA polymerase is synthesized

Accepted Answer

A) at a ribosome,and it remains within the cell. 
B) at the rough endoplasmic reticulum,and it is secreted from the cell. 
C) at the Golgi apparatus,and it is embedded in the cell membrane. 
D) in the nucleus,and it is converted to RNA for export outside the cell. 
A) at a ribosome,and it remains within the cell. 
B) at the rough endoplasmic reticulum,and it is secreted from the cell. 
C) at the Golgi apparatus,and it is embedded in the cell membrane. 
D) in the nucleus,and it is converted to RNA for export outside the cell.

Question 10

When our inner ears convert sound energy into neural impulses or our retinas convert light into neural impulses,

Accepted Answer

A) no heat is generated,and so it is an exception to the first law of thermodynamics. 
B) it is an exception to both laws of thermodynamics,because no usable energy is lost. 
C) it is consistent with the second law of thermodynamics,but an exception to the first. 
D) the conversion is consistent with both laws of thermodynamics. 
A) no heat is generated,and so it is an exception to the first law of thermodynamics. 
B) it is an exception to both laws of thermodynamics,because no usable energy is lost. 
C) it is consistent with the second law of thermodynamics,but an exception to the first. 
D) the conversion is consistent with both laws of thermodynamics.

Question 11

A protein kinase is an enzyme that adds a phosphate to its substrate.

Accepted Answer

A) True 
 B)False

Question 12

Enzymes are biological catalysts that are crucial for normal human metabolism.

Accepted Answer

A) True 
 B)False

Question 13

The energy stored in a molecule's chemical bonds is a form of kinetic energy.

Accepted Answer

A) True 
 B)False

Question 14

Fatty acids enter the cell respiration pathway at

Accepted Answer

A) the citric acid cycle,once they have been converted to acetyl CoA. 
B) glycolysis,once they have been converted to glucose. 
C) electron transport chain,once they have been converted to NADH. 
D) the intermediate stage,once they have been converted to pyruvate. 
A) the citric acid cycle,once they have been converted to acetyl CoA. 
B) glycolysis,once they have been converted to glucose. 
C) electron transport chain,once they have been converted to NADH. 
D) the intermediate stage,once they have been converted to pyruvate.

Question 15

The exchange of a phosphate group between creatine phosphate and adenosine diphosphate is categorized as a catabolic (rather than anabolic)reaction.

Accepted Answer

A) True 
 B)False

Question 16

A fever of 101$\circ$F causes most enzymes in the human body

Accepted Answer

A) to denature. 
B) to become more rigid. 
C) to be more flexible and efficient. 
D) to saturate. 
A) to denature. 
B) to become more rigid. 
C) to be more flexible and efficient. 
D) to saturate.

Question 17

Generally,a decrease in substrate concentration leads to an increase in reaction rate.

Accepted Answer

A) True 
 B)False

Question 18

Glycolysis requires oxygen.

Accepted Answer

A) True 
 B)False

Question 19

Noncompetitive inhibition of an enzyme occurs when the inhibitor binds to the

Accepted Answer

A) allosteric site,and its effectiveness is not influenced by substrate concentration. 
B) allosteric site,and its effectiveness depends on substrate concentration. 
C) active site,and its effectiveness is not influenced by substrate concentration. 
D) active site,and its effectiveness depends on substrate concentration. 
E) substrate,and its effectiveness depends on product concentration. 
A) allosteric site,and its effectiveness is not influenced by substrate concentration. 
B) allosteric site,and its effectiveness depends on substrate concentration. 
C) active site,and its effectiveness is not influenced by substrate concentration. 
D) active site,and its effectiveness depends on substrate concentration. 
E) substrate,and its effectiveness depends on product concentration.

Question 20

Exergonic reactions do not require activation energy.

Accepted Answer

A) True 
 B)False

Exam 3: Energy,Chemical Reactions,and Cellular Respiration

When we shiver on a cold day,the heat produced by muscle tissue is a demonstration of

During the citric acid cycle,an acetyl CoA molecule produced in the intermediate stage combines with a molecule of

The first law of thermodynamics states that once energy is consumed,it can no longer be converted to any other form of energy.

Organic cofactors are referred to as _________.

Which of the following choices lists the order of stages of cellular respiration in proper order

The intermediate stage of cellular respiration

Which enzyme class splits a chemical bond in the absence of water

The term "metabolism" refers to

The enzyme DNA polymerase is synthesized

When our inner ears convert sound energy into neural impulses or our retinas convert light into neural impulses,

A protein kinase is an enzyme that adds a phosphate to its substrate.

Enzymes are biological catalysts that are crucial for normal human metabolism.

The energy stored in a molecule's chemical bonds is a form of kinetic energy.

Fatty acids enter the cell respiration pathway at

The exchange of a phosphate group between creatine phosphate and adenosine diphosphate is categorized as a catabolic (rather than anabolic)reaction.

A fever of 101 ∘\circ∘ F causes most enzymes in the human body

Generally,a decrease in substrate concentration leads to an increase in reaction rate.

Glycolysis requires oxygen.

Noncompetitive inhibition of an enzyme occurs when the inhibitor binds to the

Exergonic reactions do not require activation energy.

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A fever of 101^$\circ$F causes most enzymes in the human body