Chapter 7: Membrane Structure And Function

Front 1

The large molecules of all living things fall into four classes. Name them.

Back 1

Carbohydrates, lipids, proteins, and nucleic acids.

Front 2

What does it mean if a molecule is amphipathic?

Back 2

It has both a hydrophobic region and a hydrophilic region.

Front 3

How does decreasing temperature affect membrane fluidity?

Back 3

Closely packed together phospholipids settle and solidify.

Front 4

What is membrane fluidity?

Back 4

Membrane fluidity is the ability of lipids and proteins to drift laterally within the protein.

Front 5

How do phospholipids and unsaturated hydrocarbon chains affect membrane fluidity?

Back 5

Membranes remain fluid at lower temperatures because kinks in non-polar tails cannot be packed closely together.

Front 6

How does cholesterol affect membrane fluidity?

Back 6

Makes membranes less fluid at 37ºC by restraining phospholipid movement (temp buffer).

Front 7

integral proteins

Back 7

Penetrate the hydrophobic core of the lipid bilayer.

Front 8

peripheral proteins

Back 8

Not embedded in the lipid bilayer, loosely bound to the surface membrane.

Front 9

Distinguish between glycolipids and glycoproteins.

Back 9

Glycoproteins are bonded to proteins. Glycolipids are carbohydrates conveniently bonded to lipids.

Front 10

Distinguish between channel proteins and carrier proteins.

Back 10

Channel proteins have a hydrophilic channel for molecules/ions to tunnel through.

Carrier proteins change their shape to shuttle molecule/ion across the membrane.