B12 Bioc 7 - Membranes

Which of the following is not a common function of membrane proteins?

• Transport

• Enzyme

• Attachment

• Information storage

True or false: Cell membranes are symmetrical on the inside and outside of cells

• True

• False

The tail of a phospholipid is

• Hydrophobic

• Hydrophilic

Which type of hydrocarbon will allow the membrane to be fluid at a low temperature?

• Saturated

• Unsaturated

• Either answer is correct

Cholesterol in the cell membrane stabilizes it's fluidity at

• Low temperatures

• High temperatures

• Both answers are correct

What type of protein is attached to the hydrophobic core of the membrane?

• Integral

• Peripheral

• Interior

• Exterior

What type of protein is connected to the membrane by hydrogen bonds?

• Integral

• Peripheral

What type of transport requires energy?

• Diffusion

• Osmosis

• Facilitated diffusion

• Active transport

The direction of diffusion is always from ____ to ___

• Low to high

• High to low

• High to high

• Low to low

What direction will water move if a cell is placed in a hypertonic solution?

• Into the cell

• Out of the cell

• In both directions equally