Cell Structure and Function

What gives shape and mechanical strength to plant cells?

• Cytoplasm
• Nucleus
• Mitochondria
• Cell wall

Which of the following is an example of active transport?

• Glucose absorption
• Water reabsorption
• Ion leakage
• Na+/K+ pump

What kind of transport requires energy in the form of ATP?

• Passive transport
• Osmosis
• Facilitated diffusion
• Active transport

Why do polar molecules require assistance to cross the membrane?

• They are too small
• They are always gaseous
• They lack energy
• They cannot pass through the nonpolar lipid layer

What is the process called when water moves across a semipermeable membrane from high to low concentration?

• Diffusion
• Facilitated diffusion
• Active transport
• Osmosis