Bio Quiz 5 (for exam #3)

Question 1

Which molecule is involved in forming the membrane bilayer that surround cells?

Answer 1

Phospholipids

Question 2

Organisms like winter wheat are able to survive in extremely cold environments. Their cell membranes must be able to remain fluid by doing what?

Answer 2

Replacing saturated fatty acids (tails) with no more unsaturated fatty acids in the phospholipids.

Question 3

Which statement about Osmosis is false?

Answer 3

Osmosis is a form of active transport

Question 4

What is the correct difference between carrier and channel proteins?

Answer 4

Carrier proteins change shape during transport of molecules, whereas channel proteins do not change shape during transport of molecules

Question 5

How can large, polar, and/or charged molecules cross the membrane bilayer through passive transport?

Answer 5

These molecules can diffuse down their concentration gradients by traveling through carrier proteins and channel proteins in the membrane.

Question 6

In which direction does active transport move molecules?

Answer 6

In the opposite direction as diffusion moves molecules.

Question 7

What do enzymes usually end up in?

Each enzyme will have?

Answer 7

ase

Yes: Kinase, Hydrolase, etc.

Ex: NOT Cytokine
Yes: Kinase, Hydrolase, etc.