Question 1

Entry of monosaccharides other than glucose into the glycolysis pathway initially involves

Accepted Answer

A) breakdown into pyruvate. 
B) oxidation into acetyl groups. 
C) conversion into phosphates. 
D) reduction of carbonyl groups. 
E) hydrolysis of 2-carbon units. 
A) breakdown into pyruvate. 
B) oxidation into acetyl groups. 
C) conversion into phosphates. 
D) reduction of carbonyl groups. 
E) hydrolysis of 2-carbon units.

Question 2

What are the three possible fates of pyruvate?

Accepted Answer

Pyruvate may either be convert

Question 3

How many ATP are generated from the 10 NADH molecules formed during complete oxidation of glucose?

Accepted Answer

A) 20 
B) 30 
C) 38 
D) 25 
E) 32 
A) 20 
B) 30 
C) 38 
D) 25 
E) 32

Question 4

If a glucose tolerance test shows an abnormally high level of glucose in the blood after several hours,the person is possibly

Accepted Answer

A) hypoglycemic. 
B) diabetic. 
C) anemic. 
D) overweight. 
A) hypoglycemic. 
B) diabetic. 
C) anemic. 
D) overweight.

Question 5

In an individual who is starving or fasting,the body meets its need for glucose first by the process of ________,and then by the process of ________.

Accepted Answer

A) glycolysis;gluconeogenesis 
B) glycogenolysis;gluconeogenesis 
C) gluconeogenesis;glycogenesis 
D) glycogenesis;lipogenesis 
E) lipogenesis;glycogenolysis 
A) glycolysis;gluconeogenesis 
B) glycogenolysis;gluconeogenesis 
C) gluconeogenesis;glycogenesis 
D) glycogenesis;lipogenesis 
E) lipogenesis;glycogenolysis

Question 6

The products of glycolysis important in metabolism are

Accepted Answer

A) acetyl-CoA and ATP. 
B) pyruvate,ATP,and NADH. 
C) CO2,ATP,and NADH. 
D) pyruvate,ADP,and NAD+. 
E) CO2 and H2O. 
A) acetyl-CoA and ATP. 
B) pyruvate,ATP,and NADH. 
C) CO2,ATP,and NADH. 
D) pyruvate,ADP,and NAD+. 
E) CO2 and H2O.

Question 7

Which of the following carbohydrates can also be used as fuel in glycolysis?

Accepted Answer

A) glucose 
B) glucose and fructose 
C) fructose and galactose 
D) galactose,fructose,and mannose 
E) fructose 
A) glucose 
B) glucose and fructose 
C) fructose and galactose 
D) galactose,fructose,and mannose 
E) fructose

Question 8

Which of the following are produced as a net result of glycolysis?
I.NADH II.NAD+ III.ADP IV.ATP

Accepted Answer

A) I and II 
B) III and IV 
C) I and III 
D) I and IV 
E) II and III 
A) I and II 
B) III and IV 
C) I and III 
D) I and IV 
E) II and III

Question 9

The net number of ATP formed when one molecule of glucose is converted to pyruvate is

Accepted Answer

A) 1. 
B) 2. 
C) 3. 
D) 4. 
E) 5. 
A) 1. 
B) 2. 
C) 3. 
D) 4. 
E) 5.

Question 10

When a cell's need for NADPH or ribose-6-phosphate exceeds its need for ATP,glucose-6-phosphate is metabolized by

Accepted Answer

A) gluconeogenesis. 
B) glycogenesis. 
C) glycolysis. 
D) glycogenolysis. 
E) the pentose phosphate pathway. 
A) gluconeogenesis. 
B) glycogenesis. 
C) glycolysis. 
D) glycogenolysis. 
E) the pentose phosphate pathway.

Question 11

All of the following statements concerning digestion are correct except

Accepted Answer

A) the major chemical reaction in digestion is enzyme-catalyzed hydrolysis of large molecules. 
B) digestion begins in the mouth,continues in the stomach,and is completed in the small intestine. 
C) digestion can be considered a catabolic process in which bulk food is broken down into individual small molecules. 
D) the same enzymes are used in the digestion of carbohydrates,lipids,and proteins. 
E) the major physical processes in digestion are mixing,softening,and grinding of food. 
A) the major chemical reaction in digestion is enzyme-catalyzed hydrolysis of large molecules. 
B) digestion begins in the mouth,continues in the stomach,and is completed in the small intestine. 
C) digestion can be considered a catabolic process in which bulk food is broken down into individual small molecules. 
D) the same enzymes are used in the digestion of carbohydrates,lipids,and proteins. 
E) the major physical processes in digestion are mixing,softening,and grinding of food.

Question 12

The chemical produced in steps 3-5 of glycolysis and oxidized in step 6 is

Accepted Answer

A) glucose. 
B) acetyl-CoA. 
C) glyceraldehyde 3-phosphate. 
D) citrate. 
E) oxaloacetate. 
A) glucose. 
B) acetyl-CoA. 
C) glyceraldehyde 3-phosphate. 
D) citrate. 
E) oxaloacetate.

Question 13

The first step of glycolysis involves ________ to form ________.

Accepted Answer

A) esterification;glucose-6-phosphate 
B) oxidation;glucose -6-phosphate 
C) addition;fructose-1,6-diphosphate 
D) esterification;glucose-1-phosphate 
E) isomerization;fructose-6-phosphate 
A) esterification;glucose-6-phosphate 
B) oxidation;glucose -6-phosphate 
C) addition;fructose-1,6-diphosphate 
D) esterification;glucose-1-phosphate 
E) isomerization;fructose-6-phosphate

Question 14

Insulin increases the rate at which glucose

Accepted Answer

A) is converted to glycogen. 
B) is converted to fat. 
C) enters the cell. 
D) is converted from glycogen. 
E) More than one response is correct. 
A) is converted to glycogen. 
B) is converted to fat. 
C) enters the cell. 
D) is converted from glycogen. 
E) More than one response is correct.

Question 15

Glycogenolysis can be correctly represented by which of the following pathways?

Accepted Answer

A) glucose → glycogen 
B) glycogen → glucose 
C) pyruvate → glycogen 
D) glycogen → pyruvate 
E) glucose → pyruvate 
A) glucose → glycogen 
B) glycogen → glucose 
C) pyruvate → glycogen 
D) glycogen → pyruvate 
E) glucose → pyruvate

Question 16

The synthesis of glycogen from excess glucose is

Accepted Answer

A) glycolysis. 
B) gluconeogenesis. 
C) glycogenesis. 
D) glycogenolysis. 
E) the pentose phoshate pathway. 
A) glycolysis. 
B) gluconeogenesis. 
C) glycogenesis. 
D) glycogenolysis. 
E) the pentose phoshate pathway.

Question 17

All of these enzymes used in glycolysis involve the transfer of a phosphate group except

Accepted Answer

A) hexokinase. 
B) aldolase. 
C) phosphglycerate kinase. 
D) pyruvate kinase. 
E) phosphofructokinase. 
A) hexokinase. 
B) aldolase. 
C) phosphglycerate kinase. 
D) pyruvate kinase. 
E) phosphofructokinase.

Question 18

Match the following.
-glycogenolysis

Accepted Answer

A) the conversion of glucose into carbohydrate molecules containing phosphate groups and five carbon atoms 
B) the conversion of glucose into glycogen 
C) the conversion of glycogen into glucose 
D) the production of glucose from noncarbohydrate sources 
E) the conversion of glucose into pyruvate 
A) the conversion of glucose into carbohydrate molecules containing phosphate groups and five carbon atoms 
B) the conversion of glucose into glycogen 
C) the conversion of glycogen into glucose 
D) the production of glucose from noncarbohydrate sources 
E) the conversion of glucose into pyruvate

Question 19

The action of yeast on pyruvate is a process referred to as

Accepted Answer

A) alcoholic fermentation. 
B) aerobic oxidation. 
C) glycolysis. 
D) anaerobic reduction. 
E) substrate-level phosphorylation. 
A) alcoholic fermentation. 
B) aerobic oxidation. 
C) glycolysis. 
D) anaerobic reduction. 
E) substrate-level phosphorylation.

Question 20

Which chemical is produced from pyruvate when it is metabolized in muscle cells under anaerobic conditions?

Accepted Answer

A) lactate 
B) ethanol 
C) acetyl-CoA 
D) phosphoenol pyruvate 
E) glucose 
A) lactate 
B) ethanol 
C) acetyl-CoA 
D) phosphoenol pyruvate 
E) glucose

Exam 22: Carbohydrate Metabolism

Entry of monosaccharides other than glucose into the glycolysis pathway initially involves

What are the three possible fates of pyruvate?

How many ATP are generated from the 10 NADH molecules formed during complete oxidation of glucose?

If a glucose tolerance test shows an abnormally high level of glucose in the blood after several hours,the person is possibly

In an individual who is starving or fasting,the body meets its need for glucose first by the process of ________,and then by the process of ________.

The products of glycolysis important in metabolism are

Which of the following carbohydrates can also be used as fuel in glycolysis?

Which of the following are produced as a net result of glycolysis? I.NADH II.NAD+ III.ADP IV.ATP

The net number of ATP formed when one molecule of glucose is converted to pyruvate is

When a cell's need for NADPH or ribose-6-phosphate exceeds its need for ATP,glucose-6-phosphate is metabolized by

All of the following statements concerning digestion are correct except

The chemical produced in steps 3-5 of glycolysis and oxidized in step 6 is

The first step of glycolysis involves ________ to form ________.

Insulin increases the rate at which glucose

Glycogenolysis can be correctly represented by which of the following pathways?

The synthesis of glycogen from excess glucose is

All of these enzymes used in glycolysis involve the transfer of a phosphate group except

Match the following. -glycogenolysis

The action of yeast on pyruvate is a process referred to as

Which chemical is produced from pyruvate when it is metabolized in muscle cells under anaerobic conditions?

Matter and Measurements

Atoms and the Periodic Table

Ionic Compounds

Molecular Compounds

Classification and Balancing of Chemical Reactions

Chemical Reactions: Mole and Mass Relationships

Chemical Reactions: Energy, rates, and Equilibrium

Gases, liquids, and Solids

Solutions

Acids and Bases

Nuclear Chemistry

Introduction to Organic Chemistry: Alkanes

Alkenes, alkynes, and Aromatic Compounds

Some Compounds With Oxygen, sulfur, or a Halogen

Aldehydes and Ketones

Amines

Carboxylic Acids and Their Derivatives

Amino Acids and Proteins

Enzymes and Vitamins

Carbohydrates

The Generation of Biochemical Energy

Lipids

Lipid Metabolism

Protein and Amino Acid Metabolism

Nucleic Acids and Protein Synthesis

Genomics

Chemical Messengers: Hormones, neurotransmitters, and Drugs

Body Fluids

Filters

In an individual who is starving or fasting,the body meets its need for glucose first by the process of ,and then by the process of .

Which of the following are produced as a net result of glycolysis? I.NADH II.NAD⁺ III.ADP IV.ATP

The first step of glycolysis involves to form .