Cell Membranes and Transport

Which of the following is NOT true about passive transport?

• molecules will move from high concentration to low

• osmosis is one example

• endocytosis is one example

• no energy is required

When molecules or ions are moved against their concentration gradient, this is:

• active transport

• passive transport

• facilitated diffusion

• osmosis

The process of using energy to transport large molecules out of the cell in a vesicle.

• diffusion

• sodium potassium pump

• endocytosis

• exocytosis

Which is a type of protein used for active transport?

• channel protein

• hemoglobin

• sodium potassium pump

• albumin

A double layer of _______ makes up the cell membrane.

• carbohydrates

• phospholipids

• cellulose

• cholesterol

Which of the following are NOT a part of a phospholipid? (select multiple)

• R-group

• phosphate head

• fatty acid tails

• nitrogenous base

What molecule in the cell membrane helps to stabilize the membrane?

• cholesterol

• carbohydrate

• protein

• nucleic acid

If a cell is placed in a hypertonic solution, what will happen?

• It will grow.

• It will shrink.

• It will explode.

• It will not change size.

What type of molecule is involved in facilitated diffusion?

• protein

• carbohydrate

• cholesterol

• oxygen

Red food coloring is dropped into one side of a glass of water. In which direction will the molecules diffuse?

• to the left

• to the right

• they will not diffuse

• down