Question 1

"Catabolism" refers to

Accepted Answer

A)   chemical reactions that acquire energy.
B)   chemical reactions that release energy.
C)   synthesis of large molecules.
D)   the formation of genetic material.E) A) and C)
F) All of the above

Question 2

An enzyme is

Accepted Answer

A)   a molecule, usually a protein, that speeds the rate of a biochemical reaction by lowering the activation energy.
B)   the genetic material.
C)   a protein that promotes metabolic reactions by slowing reactions that are too fast.
D)   usually a vitamin.E) A) and D)
F) None of the above

Question 3

Which of the following is not a characteristic of enzymes?

Accepted Answer

A)   They speed up the rate of chemical reactions but are not used up in the process.
B)   Most are proteins.
C)   They are most active at temperatures above 53 degrees C.
D)   They have active sites and interact with specific substrates.E) B) and C)
F) A) and D)

Question 4

How many codons specify the twenty types of amino acids?

Accepted Answer

A)   61
B)   23
C)   46
D)   3E) C) and D)
F) A) and C)

Question 5

A mutation can cause disease if

Accepted Answer

A)   the DNA sequence does not change.
B)   the DNA sequence changes so that one amino acid is substituted for another in a way that affects the encoded protein's functioning.
C)   the DNA sequence changes so that one amino acid is substituted for another in a way that does not alter the encoded protein's functioning.
D)   it attracts mutagens.E) B) and D)
F) A) and C)

Question 6

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.E) B) and C)
F) A) and B)

Question 7

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 8

The portion of a DNA molecule that contains the genetic information for making a protein is called a gene.

Accepted Answer

A) True 
 B)False

Question 9

A mutation may occur spontaneously or by exposure to a mutagen.

Accepted Answer

A) True 
 B)False

Question 10

All of the genetic information in a cell is a genome.

Accepted Answer

A) True 
 B)False

Question 11

During the anaerobic reactions of cellular respiration, pyruvic acid reacts to form glucose.

Accepted Answer

A) True 
 B)False

Question 12

Anaerobic and aerobic respiration begin with _______, in which glucose is broken down.

Accepted Answer

The answer of Anaerobic and aerobic respiration begin with _______,...

Question 13

The metabolome includes

Accepted Answer

A)   all of the genes that encode protein in the genome.
B)   the DNA that does not encode protein in the genome.
C)   all of the small molecules that are part of metabolism.
D)   all of the enzymes that take part in aerobic respiration.E) B) and C)
F) A) and C)

Question 14

The part of the tRNA that binds mRNA is the anticodon.

Accepted Answer

A) True 
 B)False

Question 15

An active site of an enzyme is

Accepted Answer

A)   the part of the enzyme that binds ATP.
B)   a sequence of DNA nucleotides that encodes a protein molecule.
C)   the part of a substrate that combines with an enzyme.
D)   the part of an enzyme that combines with a substrate.E) B) and D)
F) B) and C)

Question 16

A DNA molecule is a double helix in which A pairs with C and T pairs with
G.

Accepted Answer

A) True 
 B)False

Question 17

In DNA replication, the two halves of the double helix separate and enzymes place A, C, G, and U nucleotides opposite their complements, forming two double helices from one.

Accepted Answer

A) True 
 B)False

Question 18

The process that extracts energy from glucose and makes it available is cellular ________.

Accepted Answer

The answer of The process that extracts energy from glucose...

Question 19

In adipose tissue, fat molecules form when fatty acid molecules and glycerol join by hydrolysis.

Accepted Answer

A) True 
 B)False

Question 20

Enzymes are proteins that promote specific chemical reactions.

Accepted Answer

A) True 
 B)False

Exam 4: Cellular Metabolism

An active site of an enzyme is

Correct AnswerverifiedShow Answer

"Catabolism" refers to

Correct AnswerverifiedShow Answer

The part of the tRNA that binds mRNA is the anticodon.

Correct AnswerverifiedShow Answer

A mutation can cause disease if

Correct AnswerverifiedShow Answer

In DNA replication, the two halves of the double helix separate and enzymes place A, C, G, and U nucleotides opposite their complements, forming two double helices from one.

Correct AnswerverifiedShow Answer

In adipose tissue, fat molecules form when fatty acid molecules and glycerol join by hydrolysis.

Correct AnswerverifiedShow Answer

Anaerobic and aerobic respiration begin with _______, in which glucose is broken down.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following is not a characteristic of enzymes?

Correct AnswerverifiedShow Answer

A DNA molecule is a double helix in which A pairs with C and T pairs with G.

Correct AnswerverifiedShow Answer

A mutation may occur spontaneously or by exposure to a mutagen.

Correct AnswerverifiedShow Answer

The portion of a DNA molecule that contains the genetic information for making a protein is called a gene.

Correct AnswerverifiedShow Answer

The process that extracts energy from glucose and makes it available is cellular ________.

Correct AnswerverifiedShow Answer

How many codons specify the twenty types of amino acids?

Correct AnswerverifiedShow Answer

The metabolome includes

Correct AnswerverifiedShow Answer

During the anaerobic reactions of cellular respiration, pyruvic acid reacts to form glucose.

Correct AnswerverifiedShow Answer

An enzyme is

Correct AnswerverifiedShow Answer

A mutation is

Correct AnswerverifiedShow Answer

Enzymes are proteins that promote specific chemical reactions.

Correct AnswerverifiedShow Answer

All of the genetic information in a cell is a genome.

Correct AnswerverifiedShow Answer

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