Lecture Quiz #3

Question 1

Diffusion of water down a concentration gradient across a membrane is:

Answer 1

osmosis

Question 2

Water moves rapidly across cell membranes through special proteins known as:

Answer 2

aquaporins

Question 3

The bulk transport of materials out of a cell is known as:

Answer 3

exocytosis

Question 4

The immediate source of energy for most cellular work is:

Answer 4

ATP

Question 5

Enzymes speed reactions mainly by:

Answer 5

lowering activation energy

Question 6

The names of enzymes commonly end in:

Answer 6

• ase

Question 7

The active site of an enzyme is the region that:

Answer 7

is involved in the catalytic reaction

Question 8

H+ is…

1) freely permeable

2) somewhat permeable

3) impermeable

Answer 8

impermeable

Question 9

Glucose is…

1) freely permeable

2) somewhat permeable

3) impermeable

Answer 9

impermeable

Question 10

CO2 is…

1) freely permeable

2) somewhat permeable

3) impermeable

Answer 10

freely permeable

Question 11

Cl- is…

1) freely permeable

2) somewhat permeable

3) impermeable

Answer 11

impermeable

Question 12

H2O is…

1) freely permeable

2) somewhat permeable

3) impermeable

Answer 12

somewhat permeable

Question 13

O2 is…

1) freely permeable

2) somewhat permeable

3) impermeable

Answer 13

Freely permeable