Question 1

The enzyme catalase acts on the substrate

Accepted Answer

A) oxygen. 
B) hydrogen. 
C) hydrogen peroxide. 
D) peroxidase. 
A) oxygen. 
B) hydrogen. 
C) hydrogen peroxide. 
D) peroxidase.

Question 2

In the citric acid cycle,

Accepted Answer

A) carbon dioxide is released. 
B) oxygen atoms are released. 
C) 4 ATP molecules are formed. 
D) hydrochloric acid is released. 
A) carbon dioxide is released. 
B) oxygen atoms are released. 
C) 4 ATP molecules are formed. 
D) hydrochloric acid is released.

Question 3

A metabolic pathway is a particular sequence of enzyme-controlled reactions.

Accepted Answer

A) True 
 B)False

Question 4

An active site is the part of a substrate molecule that binds an enzyme.

Accepted Answer

A) True 
 B)False

Question 5

The synthesis of an ATP molecule requires two ADP molecules.

Accepted Answer

A) True 
 B)False

Question 6

The correspondence between a unit of DNA information and an amino acid is the genetic ________.

Accepted Answer

The answer of The correspondence between a unit of DNA...

Question 7

Which of the following is not true regarding RNA?

Accepted Answer

A) It is transcribed in the nucleus and enters the cytoplasm. 
B) It includes ribose, a 5-carbon sugar. 
C) It is double-stranded. 
D) It has cytosine as one of its four nitrogenous bases. 
A) It is transcribed in the nucleus and enters the cytoplasm. 
B) It includes ribose, a 5-carbon sugar. 
C) It is double-stranded. 
D) It has cytosine as one of its four nitrogenous bases.

Question 8

The electron transport chain is a series of enzyme complexes that pass electrons one-to-another, releasing energy that is used to phosphorylate ADP to ATP on the inner mitochondrial membrane.

Accepted Answer

A) True 
 B)False

Question 9

Metabolism refers to all of the chemical reactions in a cell.

Accepted Answer

A) True 
 B)False

Question 10

A mutation is

Accepted Answer

A) a change in a DNA sequence in less than 1% of a population that affects anatomy and/or physiology. 
B) a common genetic variant. 
C) always beneficial to health. 
D) always harmful to health. 
A) a change in a DNA sequence in less than 1% of a population that affects anatomy and/or physiology. 
B) a common genetic variant. 
C) always beneficial to health. 
D) always harmful to health.

Question 11

Three types of genetic changes are

Accepted Answer

A) replication, transcription, and translation. 
B) A to C, G to C, and U to A. 
C) mutations, SNPs, and changes in copy number. 
D) adenine, guanine, and cytosine. 
A) replication, transcription, and translation. 
B) A to C, G to C, and U to A. 
C) mutations, SNPs, and changes in copy number. 
D) adenine, guanine, and cytosine.

Question 12

In what molecule are codons found?

Accepted Answer

A) mRNA 
B) tRNA 
C) rRNA 
D) Proteins. 
A) mRNA 
B) tRNA 
C) rRNA 
D) Proteins.

Question 13

The DNA damage response replaces mismatched nucleotides.

Accepted Answer

A) True 
 B)False

Question 14

Transcription yields protein and translation produces RNA.

Accepted Answer

A) True 
 B)False

Question 15

Oxidation of glucose is important because it releases energy.

Accepted Answer

A) True 
 B)False

Question 16

If the DNA sequence for an enzyme lacked a stop codon, this would mean

Accepted Answer

A) transcription would not have an end point. 
B) translation would not have an end point. 
C) DNA replication would not be possible. 
D) the incorrect amino acid would be incorporated into the final enzyme at that point. 
A) transcription would not have an end point. 
B) translation would not have an end point. 
C) DNA replication would not be possible. 
D) the incorrect amino acid would be incorporated into the final enzyme at that point.

Question 17

An important mechanism that controls metabolic pathways under physiological conditions is

Accepted Answer

A) positive feedback. 
B) signal transduction. 
C) negative feedback. 
D) genetic control. 
A) positive feedback. 
B) signal transduction. 
C) negative feedback. 
D) genetic control.

Question 18

Three types of RNA participate in protein synthesis.

Accepted Answer

A) True 
 B)False

Question 19

An example of an anabolic reaction is

Accepted Answer

A) many monosaccharides bonding, forming glycogen. 
B) a dipeptide breaking down into two amino acids. 
C) glycerol reacting with three fatty acid molecules to yield water and proteins. 
D) glycogen breaking down into many monosaccharides. 
A) many monosaccharides bonding, forming glycogen. 
B) a dipeptide breaking down into two amino acids. 
C) glycerol reacting with three fatty acid molecules to yield water and proteins. 
D) glycogen breaking down into many monosaccharides.

Question 20

Arsenic poisoning harms the body by

Accepted Answer

A) unraveling the DNA double helix. 
B) interfering with cellular extraction of energy from glucose. 
C) forming more sulfur bonds in proteins. 
D) rotting the teeth. 
A) unraveling the DNA double helix. 
B) interfering with cellular extraction of energy from glucose. 
C) forming more sulfur bonds in proteins. 
D) rotting the teeth.

Exam 4: Cellular Metabolism

The enzyme catalase acts on the substrate

In the citric acid cycle,

A metabolic pathway is a particular sequence of enzyme-controlled reactions.

An active site is the part of a substrate molecule that binds an enzyme.

The synthesis of an ATP molecule requires two ADP molecules.

The correspondence between a unit of DNA information and an amino acid is the genetic ________.

Which of the following is not true regarding RNA?

The electron transport chain is a series of enzyme complexes that pass electrons one-to-another, releasing energy that is used to phosphorylate ADP to ATP on the inner mitochondrial membrane.

Metabolism refers to all of the chemical reactions in a cell.

A mutation is

Three types of genetic changes are

In what molecule are codons found?

The DNA damage response replaces mismatched nucleotides.

Transcription yields protein and translation produces RNA.

Oxidation of glucose is important because it releases energy.

If the DNA sequence for an enzyme lacked a stop codon, this would mean

An important mechanism that controls metabolic pathways under physiological conditions is

Three types of RNA participate in protein synthesis.

An example of an anabolic reaction is

Arsenic poisoning harms the body by

Introduction to Human Anatomy and Physiology

Chemical Basis of Life

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Lymphatic System and Immunity

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