Chapter 4 Exam Review

Question 1

During chemical reaction, a catalyst (enzyme) increases the rate at which the reaction occurs. True or False

Answer 1

True

Question 2

Most enzymes are lipids. True or False

Answer 2

False

Question 3

Which of the following statements about enzymes is NOT true

Answer 3

Enzymes are consumed during a chemical reaction

Question 4

The substrate binds to the ______ of the enzyme

Answer 4

Active site

Question 5

The level of protein structure primarily involved in determining enzyme activity is the

Answer 5

Tertiary structure

Question 6

Reactant molecules of enzyme action are called

Answer 6

Substrates

Question 7

The pH optimum for enzyme secreted by the stomach is higher than the pH optimum for enzymes to create by the pancreas. True or False

Answer 7

True

Question 8

Enzymes ______ the rate of a specific chemical reaction

Answer 8

Increase

Question 9

The breakdown of hydrogen peroxide is catalyzed by

Answer 9

Catalase

Question 10

The enzyme with the lowest pH optimum is

Answer 10

Pepsin

Question 11

A defect in the enzyme that catalyzes the formation of melanin from DOPA results in

Answer 11

Albinism

Question 12

___________ It’s in the universal energy molecule of the cell

Answer 12

ATP

Question 13

At saturation, enzyme activity is maximal. True or False

Answer 13

True

Question 14

Pancreatic amylase catalyzes the breakdown of Oligosaccharides to disaccharides with the addition of water. What classification of enzymes would amylase be in?

Answer 14

Hydrolase

Question 15

The rate of a chemical reaction can be increased by either ______ the temperature or ______ activation energy.

Answer 15

Increasing, decreasing

Question 16

Catalysts (enzyme) increase reaction rates by lowering the activation energy of a reaction. True or False

Answer 16

True

Question 17

Enzymes are specific for a given substrate. True or False.

Answer 17

True

Question 18

The process that is used to make alcohol from glucose is?

Answer 18

Fermentation

Question 19

An enzyme elevated in the plasma of men with prostate cancer is?

Answer 19

Acid phosphatase

Question 20

In general, decreased body temperature causes the rate of enzymatic reactions to decrease. True or False

Answer 20

True

Question 21

The pH optima for all digestive enzymes are approximately equal to the pH of blood. True or False

Answer 21

False

Question 22

Coenzymes are organic molecules that are required for proper function of some enzymes. True or False

Answer 22

True

Question 23

End-product inhibition usually involves allosteric inhibition of an enzyme. True or False

Answer 23

True

Question 24

Regulation of metabolic pathway by the final product of a pathways called?

Answer 24

Both end-product inhibition and allosteric inhibition

Question 25

Addition of substrate when enzyme reaction rate is maximum results in

Answer 25

No change in product formation