Cell Membrane and Transport

Which of the following is a key function of the cell membrane?

• To synthesize DNA

• To regulate nutrient intake

• To produce proteins

• To store energy

Which type of protein is embedded in the lipid bilayer?

• Peripheral proteins

• Integral proteins

• Surface proteins

• Cytoskeletal proteins

What is the primary function of carbohydrates on the cell surface?

• Energy storage

• Cell communication

• DNA replication

• Protein synthesis

What is the role of carbohydrates in the cell membrane?

• Energy production

• Cell communication

• Structural support

• DNA synthesis

Which of the following is a component of the cell membrane?

• Phospholipids

• Ribosomes

• Mitochondria

• Cytoplasm

Which type of molecules require transport proteins to pass through a membrane?

• Small, hydrophobic molecules

• Small, uncharged polar molecules

• Large, uncharged polar molecules

• Small, charged molecules

What is an example of a large, uncharged polar molecule?

• N2

• Glycerol

• Glucose

• Na+

What is the main function of fluid membranes in cells?

• To make cells rigid and unchanging

• To allow cells to be dynamic and responsive

• To prevent any interaction with the environment

• To store energy for the cell

Which of the following best describes the movement of particles in diffusion?

• Random and constant

• Linear and constant

• Circular and constant

• Stationary

In diffusion, molecules move from an area of _______ concentration to an area of _______ concentration.

• equal, equal

• low, high

• high, low

• high, high

• low, equal