Question 1

Some insecticides kill insects by inhibiting the enzyme

Accepted Answer

A)  alcohol dehydrogenase. 
B)  acetylcholinesterase. 
C)  creatine kinase. 
D)  lipase. 
E)  penicillinase. 
A)  alcohol dehydrogenase. 
B)  acetylcholinesterase. 
C)  creatine kinase. 
D)  lipase. 
E)  penicillinase.

Question 2

Identify the effect of the following on the activity of maltase, an enzyme that hydrolyzes maltose.
-raising the pH to 11.0

Accepted Answer

A) decreases 
B) increases 
C) has no effect 
A) decreases 
B) increases 
C) has no effect

Question 3

Identify the effect of the following on the activity of maltase, an enzyme that hydrolyzes maltose.
-adjusting the temperature to the optimum temperature

Accepted Answer

A) decreases 
B) increases 
C) has no effect 
A) decreases 
B) increases 
C) has no effect

Question 4

Penicillin-resistant bacteria can survive treatment with penicillin because they produce the enzyme

Accepted Answer

A)  sucrase. 
B)  penicillin kinase. 
C)  penicillinase. 
D)  bacteriase. 
E)  phosphate lyase. 
A)  sucrase. 
B)  penicillin kinase. 
C)  penicillinase. 
D)  bacteriase. 
E)  phosphate lyase.

Question 5

Pyruvate carboxylase is an example of a ligase enzyme.

Accepted Answer

A) True 
 B)False

Question 6

The names of many enzymes can be recognized by the suffix __________.

Accepted Answer

A)  -ate 
B)  -ite 
C)  -ose 
D)  -ine 
E)  -ase 
A)  -ate 
B)  -ite 
C)  -ose 
D)  -ine 
E)  -ase

Question 7

The formation of an enzyme-substrate complex is the __________ step in enzyme action.

Accepted Answer

A)  first 
B)  second 
C)  third 
D)  fourth 
E)  last 
A)  first 
B)  second 
C)  third 
D)  fourth 
E)  last

Question 8

The optimum pH for the activity of pepsin is about __________.

Accepted Answer

A)  2.0 
B)  4.0 
C)  6.5 
D)  7.4 
E)  7.6 
A)  2.0 
B)  4.0 
C)  6.5 
D)  7.4 
E)  7.6

Question 9

Insulin and digestive enzymes are produced as inactive forms called zymogens.

Accepted Answer

A) True 
 B)False

Question 10

Pepsinogen is an example of a(n)

Accepted Answer

A)  coenzyme. 
B)  cofactor. 
C)  isoenzyme. 
D)  allosteric enzyme. 
E)  zymogen. 
A)  coenzyme. 
B)  cofactor. 
C)  isoenzyme. 
D)  allosteric enzyme. 
E)  zymogen.

Question 11

Indicate whether each of the following is fat soluble or water soluble.
-riboflavin

Accepted Answer

The answer of Indicate whether each of the following is...

Question 12

When a substance bonds to an enzyme for reaction, its place of binding is the

Accepted Answer

A)  allosteric site. 
B)  primary pocket. 
C)  end pocket. 
D)  primary site. 
E)  active site. 
A)  allosteric site. 
B)  primary pocket. 
C)  end pocket. 
D)  primary site. 
E)  active site.

Question 13

Urease catalyzes only the hydrolysis of urea, and no other substrates. This limited activity is called

Accepted Answer

A)  absolute specificity. 
B)  extreme specificity. 
C)  rigid specificity. 
D)  noncompetitive specificity. 
E)  hyperspecificity. 
A)  absolute specificity. 
B)  extreme specificity. 
C)  rigid specificity. 
D)  noncompetitive specificity. 
E)  hyperspecificity.

Question 14

The active site of an enzyme

Accepted Answer

A)  is remote from the site of substrate attachment. 
B)  is converted to a product. 
C)  catalyzes the reaction. 
D)  increases the energy of reaction. 
E)  includes the entire enzyme. 
A)  is remote from the site of substrate attachment. 
B)  is converted to a product. 
C)  catalyzes the reaction. 
D)  increases the energy of reaction. 
E)  includes the entire enzyme.

Question 15

Identify the type of inhibition in each description.
-The inhibitor does not resemble the substrate.

Accepted Answer

A) noncompetitive 
B) competitive 
A) noncompetitive 
B) competitive

Question 16

When an end product from an enzyme-mediated sequence is also an inhibitor for an earlier step in the reaction sequence, the process is referred to as

Accepted Answer

A)  feedback control. 
B)  competitive inhibition. 
C)  irreversible inhibition. 
D)  negative catalysis. 
E)  concentration control. 
A)  feedback control. 
B)  competitive inhibition. 
C)  irreversible inhibition. 
D)  negative catalysis. 
E)  concentration control.

Question 17

Indicate whether each of the following is fat soluble or water soluble.
-ascorbic acid

Accepted Answer

The answer of Indicate whether each of the following is...

Question 18

Match the vitamin name with its corresponding chemical name.
-vitamin B6

Accepted Answer

A) ascorbic acid 
B) niacin 
C) thiamine pyrophosphate or thiamine 
D) cobalamin 
E) pyridoxine
F)cholecalciferol
G)riboflavin 
A) ascorbic acid 
B) niacin 
C) thiamine pyrophosphate or thiamine 
D) cobalamin 
E) pyridoxine
F)cholecalciferol
G)riboflavin

Question 19

Identify the type of inhibition in each description.
-adding more substrate does not reverse the effect of this inhibitor.

Accepted Answer

A) noncompetitive 
B) competitive 
A) noncompetitive 
B) competitive

Question 20

The water-soluble B and C vitamins supply

Accepted Answer

A)  essential amino acids. 
B)  substrates necessary for most of the reactions in the body. 
C)  essential fatty acids. 
D)  coenzymes required by some enzymes. 
E)  competitive inhibitors needed to regulate enzyme activity. 
A)  essential amino acids. 
B)  substrates necessary for most of the reactions in the body. 
C)  essential fatty acids. 
D)  coenzymes required by some enzymes. 
E)  competitive inhibitors needed to regulate enzyme activity.

Exam 20: Enzymes and Vitamins

Some insecticides kill insects by inhibiting the enzyme

Identify the effect of the following on the activity of maltase, an enzyme that hydrolyzes maltose. -raising the pH to 11.0

Identify the effect of the following on the activity of maltase, an enzyme that hydrolyzes maltose. -adjusting the temperature to the optimum temperature

Penicillin-resistant bacteria can survive treatment with penicillin because they produce the enzyme

Pyruvate carboxylase is an example of a ligase enzyme.

The names of many enzymes can be recognized by the suffix __________.

The formation of an enzyme-substrate complex is the __________ step in enzyme action.

The optimum pH for the activity of pepsin is about __________.

Insulin and digestive enzymes are produced as inactive forms called zymogens.

Pepsinogen is an example of a(n)

Indicate whether each of the following is fat soluble or water soluble. -riboflavin

When a substance bonds to an enzyme for reaction, its place of binding is the

Urease catalyzes only the hydrolysis of urea, and no other substrates. This limited activity is called

The active site of an enzyme

Identify the type of inhibition in each description. -The inhibitor does not resemble the substrate.

When an end product from an enzyme-mediated sequence is also an inhibitor for an earlier step in the reaction sequence, the process is referred to as

Indicate whether each of the following is fat soluble or water soluble. -ascorbic acid

Match the vitamin name with its corresponding chemical name. -vitamin B6

Identify the type of inhibition in each description. -adding more substrate does not reverse the effect of this inhibitor.

The water-soluble B and C vitamins supply

Chemistry and Measurements

Energy and Matter

Atoms and Elements

Nuclear Chemistry

Compounds and Their Bonds

Chemical Reactions and Quantities

Gases

Solutions

Reaction Rates and Chemical Equilibrium

Acids and Bases

Introduction to Organic Chemistry: Alkanes

Alkenes, Alkynes, and Aromatic Compounds

Alcohols, Phenols, Thiols, and Ethers

Aldehydes, Ketones, and Chiral Molecules

Carbohydrates

Carboxylic Acids and Esters

Lipids

Amines and Amides

Amino Acids and Proteins

Nucleic Acids and Protein Synthesis

Metabolic Pathways for Carbohydrates

Metabolism and Energy Production

Metabolic Pathways for Lipids and Amino Acids

Filters

Match the vitamin name with its corresponding chemical name. -vitamin B₆