IB Biology B2.1 Membranes and Transport

Front

Which process(es) occur by osmosis?

• Uptake of water by cells in the intestine
• Gain of water from a plant cell in a hypertonic environment
• Evaporation of water from sweat on the skin surface
• Movement of water in the blood stream

Back

Uptake of water by cells in the intestine

Front

Which molecule regulates the fluidity of the cell membrane?

Back

Cholesterol

Front

Which type of transport happens in the sodium-potassium pump?

Back

Active transport

Front

Which molecule is an integral protein? Options: A, C, E, F

Back

A

Front

Which molecule is a peripheral protein? Options: A, C, E, F

Back

E

Front

Which part of the cell membrane is pictured here?

Back

Phospholipid

Front

Osmosis

Back

The movement of water through a membrane from a low to a high solute concentration.

Front

The diagram is a model of one type of movement across a membrane. What is this type of movement?

Back

facilitated diffusion

Front

Which regions of the cell membrane must be hydrophobic?

Back

C

Front

Which regions of the cell membrane must be hydrophilic?

Back

A, B, and E