Plasma membrane

The Plasma membrane mainly consists of

• Proteins embedded in carbohydrate-lipid layer

• Proteins embedded in a carbohydrate bilayer

• Proteins embedded in a phospholipid bilayer

• Proteins embedded in a lipid molecules

The following are the components of plasma membrane. EXCEPT one?

• cholesterol

• proteins

• carbohydrates

• nucleotide

According to the Fluid mosaic model, the quasi-fluid nature of the lipids enable

• Movement of carbohydrates within the bilayer.

• Movement of proteins within the bilayer.

• Movement of lipids within the bilayer.

• Movement of ions within the bilayer

Plasma membranes are selectively permeable. This means

• anything can pass in and out

• the membrane regulates the passage of the material in and out of the cell

• glucose cannot enter the cell

• cholesterol cannot enter

The head of a phospholipid is attracted to water, and is referred to as:

• Hydroscopic

• Hydrogenated

• hydrophobic

• Hydrophilic

What is the component of the plasma membrane that helps to minimize the effects of temperature on fluidity

• cholesterol

• phospholipids

• carbohydrates

• proteins

'Which one is the hydrophilic (water-loving) portion of the plasma membrane that can mix with water?

• A

• B

Identify a peripheral protein

• structure a

• strucure b

• structure g

• structure h

A major function of glycoproteins and glycolipids in the membane is to

• glue cells together to form tissues

• allow cells to identify each other

• attach membrane to cytoskeleton

• help retain shape

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

• ionic

• small and hydrophobic

• large polar

• large and hydrophobic