Question 1

The organelle that houses the reactions of aerobic respiration is the

Accepted Answer

A)   mitochondrion.
B)   nucleus.
C)   Golgi apparatus.
D)   lysosome.
E)   oxysome.F) C) and D)
G) B) and C)

Question 2

DNA replicates by

Accepted Answer

A)   the double helix separating and pulling in new complementary bases.
B)   creating an entirely new double helix.
C)   exiting the cell and bringing in new DNA bases.
D)   using RNA to manufacture protein molecules.
E)   shattering into pieces that reproduce themselves and attach at random.F) B) and E)
G) A) and B)

Question 3

A protein that is altered by exposure to certain chemicals,heat,extremes of pH,electricity,or radiation is said to be

Accepted Answer

A)   unnatural.
B)   genetically modified.
C)   denatured.
D)   mutated.
E)   reincarnated.F) A) and E)
G) None of the above

Question 4

Translation is the assembly of an amino acid chain according to the sequence of base triplets in a transfer RNA molecule.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following describes the steps in the correct order for an enzyme-catalyzed reaction?

Accepted Answer

A)   substrate,enzyme,enzyme-substrate complex,product+enzyme molecule
B)   enzyme,substrate,product,enzyme-substrate complex+enzyme molecule
C)   product,enzyme-substrate complex,enzyme,substrate+enzyme molecule
D)   enzyme-substrate complex,enzyme,substrate,product+ enzyme molecule
E)   enzyme,product,enzyme-product complex,substrateF) A) and B)
G) C) and D)

Question 6

The parts of a DNA molecule that contain the genetic information for making particular proteins are the

Accepted Answer

A)   nitrogenous bases.
B)   sugars.
C)   amino acids.
D)   triglycerides.
E)   phosphates.F) A) and D)
G) C) and D)

Question 7

A nonprotein component with which some enzymes must combine in order to be active is called a co-factor.

Accepted Answer

A) True 
 B)False

Question 8

The part of an ATP molecule that holds the energy used in metabolism is

Accepted Answer

A)   the sugar.
B)   the nitrogen-containing base.
C)   the phosphate bonds.
D)   the amino acid.
E)   the adenine.F) D) and E)
G) B) and C)

Question 9

A codon is a set of three nucleotides of an mRNA molecule that correspond to a particular amino acid.

Accepted Answer

A) True 
 B)False

Question 10

All of the DNA in a cell constitutes the

Accepted Answer

A)   gene.
B)   nucleus.
C)   amino acid code.
D)   genome.
E)   proteome.F) B) and D)
G) C) and D)

Question 11

In dehydration synthesis

Accepted Answer

A)   larger molecules are decomposed into smaller ones.
B)   monosaccharides are joined.
C)   water molecules become joined to monosaccharide molecules.
D)   the molecule is decomposed into carbon dioxide and water.
E)   a person develops constipation.F) A) and C)
G) D) and E)

Question 12

Of the 38 molecules of ATP generated in one round of the reactions of cellular respiration,only two come from glycolysis.

Accepted Answer

A) True 
 B)False

Question 13

The active site of an enzyme is the part that

Accepted Answer

A)   temporarily combines with the eventual product of an enzyme-catalyzed reaction.
B)   temporarily combines with a specific part of the substrate,forming an enzyme-substrate complex.
C)   temporarily combines with a specific part of another enzyme molecule to speed up an enzyme-catalyzed reaction.
D)   helps to slow down an enzyme-catalyzed reaction.
E)   must be frequently replaced.F) B) and E)
G) A) and B)

Question 14

The anticodon sequence is part of a transfer RNA molecule.

Accepted Answer

A) True 
 B)False

Question 15

A metabolic pathway is a sequence of enzyme-catalyzed reactions.

Accepted Answer

A) True 
 B)False

Question 16

Cells burn glucose in a process called oxidation.

Accepted Answer

A) True 
 B)False

Question 17

For each molecule of glucose that is decomposed completely,up to _______ molecules of ATP can be produced.

Accepted Answer

A)   34
B)   38
C)   25
D)   3
E)   100F) B) and E)
G) C) and E)

Question 18

The two molecules that enter the citric acid cycle are

Accepted Answer

A)   two 3-carbon compounds and 38 ATPs.
B)   a 4-carbon compound and an acetyl CoA.
C)   a 2-carbon compound and 4-carbon acetyl CoA.
D)   a pyruvic acid and a glucose.
E)   a glucose and a fructose.F) B) and D)
G) D) and E)

Question 19

During the anaerobic phase of cellular respiration,one molecule of glucose

Accepted Answer

A)   is broken down to yield two molecules of pyruvic acid.
B)   combines with another to yield one molecule of pyruvic acid.
C)   is converted into a molecule of pyruvic acid.
D)   is broken down to yield one molecule of pyruvic acid and one molecule of lactic acid.
E)   remains unchanged.F) C) and D)
G) B) and E)

Question 20

Complete oxidation of glucose results in nitrogen and water.

Accepted Answer

A) True 
 B)False

Exam 4: Cellular Metabolism

The part of an ATP molecule that holds the energy used in metabolism is

Correct AnswerverifiedShow Answer

A metabolic pathway is a sequence of enzyme-catalyzed reactions.

Correct AnswerverifiedShow Answer

For each molecule of glucose that is decomposed completely,up to _______ molecules of ATP can be produced.

Correct AnswerverifiedShow Answer

Which of the following describes the steps in the correct order for an enzyme-catalyzed reaction?

Correct AnswerverifiedShow Answer

All of the DNA in a cell constitutes the

Correct AnswerverifiedShow Answer

In dehydration synthesis

Correct AnswerverifiedShow Answer

Of the 38 molecules of ATP generated in one round of the reactions of cellular respiration,only two come from glycolysis.

Correct AnswerverifiedShow Answer

Cells burn glucose in a process called oxidation.

Correct AnswerverifiedShow Answer

The parts of a DNA molecule that contain the genetic information for making particular proteins are the

Correct AnswerverifiedShow Answer

A nonprotein component with which some enzymes must combine in order to be active is called a co-factor.

Correct AnswerverifiedShow Answer

A codon is a set of three nucleotides of an mRNA molecule that correspond to a particular amino acid.

Correct AnswerverifiedShow Answer

The organelle that houses the reactions of aerobic respiration is the

Correct AnswerverifiedShow Answer

The active site of an enzyme is the part that

Correct AnswerverifiedShow Answer

Translation is the assembly of an amino acid chain according to the sequence of base triplets in a transfer RNA molecule.

Correct AnswerverifiedShow Answer

DNA replicates by

Correct AnswerverifiedShow Answer

A protein that is altered by exposure to certain chemicals,heat,extremes of pH,electricity,or radiation is said to be

Correct AnswerverifiedShow Answer

The anticodon sequence is part of a transfer RNA molecule.

Correct AnswerverifiedShow Answer

Complete oxidation of glucose results in nitrogen and water.

Correct AnswerverifiedShow Answer

During the anaerobic phase of cellular respiration,one molecule of glucose

Correct AnswerverifiedShow Answer

The two molecules that enter the citric acid cycle are

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified