Quiz 7

Question 1

For a protein to be an integral membrane protein, it would have to be ________

Answer 1

amphipathic, with at least one hydrophobic region

Question 2

Why are lipids and proteins free to move laterally in membranes?

Answer 2

There are only weak hydrophobic interactions in the interior of the membrane.

Question 3

In the below animal cell (the green cell), which option best represents what will happen to the cell? _________

Inside: 10M solute
Outside: 5M solute

Answer 3

The cell will expand and likely burst

Question 4

The term osmosis is used to refer to the diffusion of what molecule? _____

Answer 4

H2O

Question 5

Which of the following statements describes a characteristic feature of a carrier protein in a plasma membrane?

Answer 5

It exhibits specificity for a particular type of molecule.

Question 6

The membranes of winter wheat are able to remain fluid when it is extremely cold by ________.

Answer 6

increasing the proportion of unsaturated phospholipids in the membrane

Question 7

According to the fluid mosaic model of cell membranes, phospholipids ________.

Answer 7

can move laterally along the plane of the membrane

Question 8

What kinds of molecules pass through a cell membrane most easily?

Answer 8

small and hydrophobic

Question 9

Membrane-bound vesicles containing substances synthesized by a cell fuse to the outer cell membrane and release their contents to the outside environment. What is this process called?

Answer 9

exocytosis

Question 10

An animal cell lacking carbohydrates on the external surface of its plasma membrane would likely be impaired in which function?

Answer 10

cell recogniton