membrane 1

Front

What allows the plasma membranes of winter wheat to remain fluid in extremely cold temperatures?

Back

Replacing saturated fatty acids with unsaturated fatty acids.

Front

What compounds in biological membranes form a barrier to the movement of hydrophilic materials?

Back

Lipids.

Front

Why do membrane proteins of fused mouse and human cells become uniformly distributed?

Back

Many proteins can move around within the bilayer.

Front

What happens to house plants adapted to indoor temperatures when left outdoors in cold environments?

Back

Their membranes lack adequate fluidity.

Front

What is a true statement about cholesterol molecules in membranes?

Back

They alter the fluidity of the membrane.

Front

Define the term 'fluid mosaic model' in relation to cell membranes.

Back

A model that describes the structure of cell membranes as a mosaic of various components (lipids, proteins, carbohydrates) that move fluidly within the layer.

Front

What role do integral membrane proteins play in biological membranes?

Back

They span the membrane and are involved in transport and communication.

Front

How do unsaturated fatty acids affect membrane fluidity?

Back

They increase fluidity by preventing tight packing of the lipid molecules.

Front

What is the function of peripheral membrane proteins?

Back

They are attached to the exterior or interior surfaces of the membrane and play roles in signaling and maintaining the cell's shape.

Front

What is the significance of membrane fluidity for cell function?

Back

Fluidity allows for the movement of proteins and lipids, facilitating cell signaling and transport.