Cell Structure and Function

What type of transport does not require ATP?

• Active transport
• Endocytosis
• Exocytosis
• Passive transport

Why is the fluid nature of the membrane essential for cellular processes?

• It prevents water loss
• It stores energy
• It blocks harmful substances
• It supports growth, secretion, and division

Which property of the cell membrane allows proteins to move laterally within it?

• Permeability
• Diffusion
• Osmosis
• Fluidity

What is the fluid mosaic model primarily used to describe?

• Structure of DNA
• Function of ribosomes
• Organization of the nucleus
• Structure of the cell membrane

What is the function of the plasma membrane in maintaining homeostasis?

• Produces hormones
• Replicates DNA
• Generates heat
• Regulates internal conditions by controlling substance movement