Question 1

The role of modulator molecules is to enhance the binding affinity of the functional site of an allosteric protein.

Accepted Answer

A) True 
 B)False

Question 2

More ATP is generated from glycolytic reactions under aerobic than under anaerobic conditions.

Accepted Answer

A) True 
 B)False

Question 3

Glycolysis

Accepted Answer

A) Does not occur in the absence of O2 
B) Does not occur in the presence of O2 
C) May result in the formation of two molecules of lactate for each molecule of glucose 
D) Both does not occur in the absence of O2 and may result in the formation of two molecules of lactate for each molecule of glucose are correct 
E) Both does not occur in the presence of O2 and may result in the formation of two molecules of lactate for each molecule of glucose are correct 
A) Does not occur in the absence of O2 
B) Does not occur in the presence of O2 
C) May result in the formation of two molecules of lactate for each molecule of glucose 
D) Both does not occur in the absence of O2 and may result in the formation of two molecules of lactate for each molecule of glucose are correct 
E) Both does not occur in the presence of O2 and may result in the formation of two molecules of lactate for each molecule of glucose are correct

Question 4

Forms channels through the membrane is descriptive of

Accepted Answer

A) Integral membrane proteins 
B) Peripheral membrane proteins 
C) Both kinds of membrane proteins 
A) Integral membrane proteins 
B) Peripheral membrane proteins 
C) Both kinds of membrane proteins

Question 5

Glucose

Accepted Answer

A) Is the only carbohydrate utilized as an energy source 
B) Must be phosphorylated before it can be metabolized 
C) Can be synthesized from other types of molecules, including amino acids and triacylglycerol 
D) Both is the only carbohydrate utilized as an energy source and must be phosphorylated before it can be metabolized are correct 
E) Both must be phosphorylated before it can be metabolized and can be synthesized from other types of molecules, including amino acids and triacylglycerol are correct 
A) Is the only carbohydrate utilized as an energy source 
B) Must be phosphorylated before it can be metabolized 
C) Can be synthesized from other types of molecules, including amino acids and triacylglycerol 
D) Both is the only carbohydrate utilized as an energy source and must be phosphorylated before it can be metabolized are correct 
E) Both must be phosphorylated before it can be metabolized and can be synthesized from other types of molecules, including amino acids and triacylglycerol are correct

Question 6

Proteins that mediate or catalyze,reactions in which the covalent bonding of the reactant molecules changes are called substrates.

Accepted Answer

A) True 
 B)False

Question 7

A binding site on a protein is

Accepted Answer

A) An area of the protein with a shape complementary to that of a ligand 
B) Determined by the amino acid sequence of the protein 
C) Formed by a region of amino acids that must be adjacent to each other on a polypeptide chain 
D) An area of the protein with a shape complementary to that of a ligand and determined by the amino acid sequence of the protein 
E) All of the choices are correct 
A) An area of the protein with a shape complementary to that of a ligand 
B) Determined by the amino acid sequence of the protein 
C) Formed by a region of amino acids that must be adjacent to each other on a polypeptide chain 
D) An area of the protein with a shape complementary to that of a ligand and determined by the amino acid sequence of the protein 
E) All of the choices are correct

Question 8

Cells that require large amounts of energy for their activities contain more ribosomes than do less active cells.

Accepted Answer

A) True 
 B)False

Question 9

A ligand is a molecule that binds to

Accepted Answer

A) A protein by covalent bonds 
B) A protein by noncovalent bonds 
C) Any other molecule by means of noncovalent bonds 
D) A protein by noncovalent bonds and any other molecule by means of noncovalent bonds 
E) None of the choices are correct 
A) A protein by covalent bonds 
B) A protein by noncovalent bonds 
C) Any other molecule by means of noncovalent bonds 
D) A protein by noncovalent bonds and any other molecule by means of noncovalent bonds 
E) None of the choices are correct

Question 10

In order to increase the overall rate of a metabolic pathway consisting of five reactions catalyzed by five different enzymes,which must occur?

Accepted Answer

A) Increasing the reaction rate of all five enzymes 
B) Increasing the reaction rate of the fastest enzyme 
C) Increasing the reaction rate of the slowest enzyme 
D) Increasing the reaction rate of the first enzyme in the pathway 
E) Increasing the reaction rate of the last enzyme in the pathway 
A) Increasing the reaction rate of all five enzymes 
B) Increasing the reaction rate of the fastest enzyme 
C) Increasing the reaction rate of the slowest enzyme 
D) Increasing the reaction rate of the first enzyme in the pathway 
E) Increasing the reaction rate of the last enzyme in the pathway

Question 11

Ribosomal subunits are synthesized in the cytosol.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following is commonly used to regulate enzyme-mediated reactions in a cell?

Accepted Answer

A) Altering the enzyme concentration in the cell 
B) Altering the enzyme's activity 
C) Altering the cell's temperature 
D) Both altering the enzyme concentration in the cell and altering the enzyme's activity are correct 
E) All of the choices are correct 
A) Altering the enzyme concentration in the cell 
B) Altering the enzyme's activity 
C) Altering the cell's temperature 
D) Both altering the enzyme concentration in the cell and altering the enzyme's activity are correct 
E) All of the choices are correct

Question 13

A light microscope can be used to view very large proteins in a cell.

Accepted Answer

A) True 
 B)False

Question 14

During cell differentiation,certain genetic information is lost,which accounts for the difference between,for example,a liver cell and a lung cell.

Accepted Answer

A) True 
 B)False

Question 15

The rate-limiting reaction in a metabolic pathway is one that occurs at a faster rate than the other steps in the pathway.

Accepted Answer

A) True 
 B)False

Question 16

May be able to move laterally in the membrane is descriptive of

Accepted Answer

A) Integral membrane proteins 
B) Peripheral membrane proteins 
C) Both kinds of membrane proteins 
A) Integral membrane proteins 
B) Peripheral membrane proteins 
C) Both kinds of membrane proteins

Question 17

In Tay Sach's disease,lysosomes do not carry out their normal function.Predict which condition would be a symptom of Tay Sach's disease.

Accepted Answer

A) There is excessive accumulation of damaged organelles in a cell 
B) Cells are unable to synthesize proteins 
C) Cells can only make ATP by glycolysis 
D) Proteins cannot be secreted by exocytosis 
E) Steroid hormones can't be produced 
A) There is excessive accumulation of damaged organelles in a cell 
B) Cells are unable to synthesize proteins 
C) Cells can only make ATP by glycolysis 
D) Proteins cannot be secreted by exocytosis 
E) Steroid hormones can't be produced

Question 18

The consequences of mutation are invariably harmful.

Accepted Answer

A) True 
 B)False

Question 19

The active site of an enzyme is a functional binding site.

Accepted Answer

A) True 
 B)False

Question 20

Tight junctions

Accepted Answer

A) Hold cells tightly together so that they cannot readily be pulled apart 
B) Form barriers that regulate the passage of materials across epithelial membranes 
C) Are commonly found in smooth muscle 
D) Both hold cells tightly together so that they cannot readily be pulled apart and form barriers that regulate the passage of materials across epithelial membranes are correct 
E) Both form barriers that regulate the passage of materials across epithelial membranes and are commonly found in smooth muscle are correct 
A) Hold cells tightly together so that they cannot readily be pulled apart 
B) Form barriers that regulate the passage of materials across epithelial membranes 
C) Are commonly found in smooth muscle 
D) Both hold cells tightly together so that they cannot readily be pulled apart and form barriers that regulate the passage of materials across epithelial membranes are correct 
E) Both form barriers that regulate the passage of materials across epithelial membranes and are commonly found in smooth muscle are correct

The role of modulator molecules is to enhance the binding affinity of the functional site of an allosteric protein.

More ATP is generated from glycolytic reactions under aerobic than under anaerobic conditions.

Glycolysis

Forms channels through the membrane is descriptive of

Glucose

Proteins that mediate or catalyze,reactions in which the covalent bonding of the reactant molecules changes are called substrates.

A binding site on a protein is

Cells that require large amounts of energy for their activities contain more ribosomes than do less active cells.

A ligand is a molecule that binds to

In order to increase the overall rate of a metabolic pathway consisting of five reactions catalyzed by five different enzymes,which must occur?

Ribosomal subunits are synthesized in the cytosol.

Which of the following is commonly used to regulate enzyme-mediated reactions in a cell?

A light microscope can be used to view very large proteins in a cell.

During cell differentiation,certain genetic information is lost,which accounts for the difference between,for example,a liver cell and a lung cell.

The rate-limiting reaction in a metabolic pathway is one that occurs at a faster rate than the other steps in the pathway.

May be able to move laterally in the membrane is descriptive of

In Tay Sach's disease,lysosomes do not carry out their normal function.Predict which condition would be a symptom of Tay Sach's disease.

The consequences of mutation are invariably harmful.

The active site of an enzyme is a functional binding site.

Tight junctions

Homeostasis: a Framework for Human Physiology

Chemical Composition of the Body

Movement of Molecules Across Cell Membranes

Control of Cells by Chemical Messengers

Neuronal Signaling and the Structure of the Nervous System

Sensory Physiology

Consciousness, the Brain, and Behavior

Muscle

Control of Body Movement

The Endocrine System

Cardiovascular Physiology

Respiratory Physiology

The Kidneys and Regulation of Water and Inorganic Ions

The Digestion and Absorption of Food

Regulation of Organic Metabolism and Energy Balance

Reproduction

The Immune System

Medical Physiology: Integration Using Clinical Cases

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Exam 3: Cellular Structure, Proteins, and Metabolism

The role of modulator molecules is to enhance the binding affinity of the functional site of an allosteric protein.

More ATP is generated from glycolytic reactions under aerobic than under anaerobic conditions.

Glycolysis

Forms channels through the membrane is descriptive of

Glucose

Proteins that mediate or catalyze,reactions in which the covalent bonding of the reactant molecules changes are called substrates.

A binding site on a protein is

Cells that require large amounts of energy for their activities contain more ribosomes than do less active cells.

A ligand is a molecule that binds to

In order to increase the overall rate of a metabolic pathway consisting of five reactions catalyzed by five different enzymes,which must occur?

Ribosomal subunits are synthesized in the cytosol.

Which of the following is commonly used to regulate enzyme-mediated reactions in a cell?

A light microscope can be used to view very large proteins in a cell.

During cell differentiation,certain genetic information is lost,which accounts for the difference between,for example,a liver cell and a lung cell.

The rate-limiting reaction in a metabolic pathway is one that occurs at a faster rate than the other steps in the pathway.

May be able to move laterally in the membrane is descriptive of

In Tay Sach's disease,lysosomes do not carry out their normal function.Predict which condition would be a symptom of Tay Sach's disease.

The consequences of mutation are invariably harmful.

The active site of an enzyme is a functional binding site.

Tight junctions

Homeostasis: a Framework for Human Physiology

Chemical Composition of the Body

Movement of Molecules Across Cell Membranes

Control of Cells by Chemical Messengers

Neuronal Signaling and the Structure of the Nervous System

Sensory Physiology

Consciousness, the Brain, and Behavior

Muscle

Control of Body Movement

The Endocrine System

Cardiovascular Physiology

Respiratory Physiology

The Kidneys and Regulation of Water and Inorganic Ions

The Digestion and Absorption of Food

Regulation of Organic Metabolism and Energy Balance

Reproduction

The Immune System

Medical Physiology: Integration Using Clinical Cases

Filters