Enzymes

Question 1

____speed up chemical reactions by lowering the activation energy needed for reactants to come together and react.

Answer 1

Enzymes

Question 2

The human enzyme that helps digest proteins in the stomach is named _____.

Answer 2

pepsin

Question 3

Proteins that speed up biochemical reactions are known as _____.

Answer 3

enzymes

Question 4

___act as biological catalysts allowing reactions to occur at the rate necessary for life.

Answer 4

enzymes

Question 5

Enzymes are biological ____

Answer 5

catalysts

Question 6

How many reactions can enzymes catalyze?

Answer 6

Several million reactions per second

Question 7

If a reaction takes several days to occur without an enzyme, how quickly can it occur with an enzyme?

Answer 7

less than a second

Question 8

About how many biochemical reactions do enzymes catalyze?

Answer 8

4,000

Question 9

Which of the following do enzymes help living organisms achieve?

Answer 9

Increasing the rate of a biochemical reaction

Question 10

The attribute(s) of an enzyme is/are that they:

Answer 10

all of the above

Question 11

Which of the following are examples of ways enzymes speed up biochemical reactions?

Answer 11

A and B

Question 12

Are enzymes reactants?

Answer 12

No

Question 13

True or False:

Enzymes slow down chemical reactions.

Answer 13

false

Question 14

Enzymes do not help in the digestion of food.

Answer 14

false

Question 15

Enzymes are used up in chemical reactions.

Answer 15

false

Question 16

Enzymes are different from catalysts in that they:

Answer 16

are proteins

Question 17

Enzymes may be used more than once.

Answer 17

true

Question 18

Enzymes are proteins that catalyze biochemical reactions.

Answer 18

true

Question 19

Enzymes are biological catalysts. They speed up biochemical reactions.

Answer 19

true

Question 20

Enzymes can catalyze several reactions per second.

Answer 20

false