Question 1

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. 
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.

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. 
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.

Question 3

All of the DNA in a cell constitutes the

Accepted Answer

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

Question 4

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

Question 5

Cells burn glucose in a process called oxidation.

Accepted Answer

A) True 
 B)False

Question 6

Complete oxidation of glucose results in nitrogen and water.

Accepted Answer

A) True 
 B)False

Question 7

The anticodon sequence is part of a transfer RNA molecule.

Accepted Answer

A) True 
 B)False

Question 8

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 9

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 10

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

Question 11

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)  100 
A)  34 
B)  38 
C)  25 
D)  3 
E)  100

Question 12

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

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. 
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.

Question 14

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. 
A)  unnatural. 
B)  genetically modified. 
C)  denatured. 
D)  mutated. 
E)  reincarnated.

Question 15

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. 
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.

Question 16

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. 
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.

Question 17

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 18

The organelle that houses the reactions of aerobic respiration is the

Accepted Answer

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

Question 19

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,substrate 
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,substrate

Question 20

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

The two molecules that enter the citric acid cycle are

DNA replicates by

All of the DNA in a cell constitutes the

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

Cells burn glucose in a process called oxidation.

Complete oxidation of glucose results in nitrogen and water.

The anticodon sequence is part of a transfer RNA molecule.

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

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

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

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

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

The active site of an enzyme is the part that

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

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

In dehydration synthesis

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

The organelle that houses the reactions of aerobic respiration is the

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

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

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Exam 4: Cellular Metabolism

The two molecules that enter the citric acid cycle are

DNA replicates by

All of the DNA in a cell constitutes the

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

Cells burn glucose in a process called oxidation.

Complete oxidation of glucose results in nitrogen and water.

The anticodon sequence is part of a transfer RNA molecule.

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

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

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

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

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

The active site of an enzyme is the part that

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

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

In dehydration synthesis

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

The organelle that houses the reactions of aerobic respiration is the

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

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

Introduction to Human Anatomy and Physiology

Chemical Basis of Life

Cells

Tissues

Integumentary System

Skeletal System

Muscular System

Nervous System

The Senses

Endocrine System

Blood

Cardiovascular System

Lymphatic System and Immunity

Digestive System and Nutrition

Respiratory System

Urinary System

Water, electrolyte, and Acid-Base Balance

Reproductive Systems

Pregnancy, growth, development, and Genetics

Filters