Review: Cell Structure and Function

Identify which of the following organelles is found in both plant and animal cells.

• Chloroplast

• Mitochondria

• Cell wall

• Central vacuole

Which of the following best describes a eukaryotic cell?

• Lacks a nucleus

• Contains membrane-bound organelles

• Has a single circular DNA molecule

• Is always unicellular

Explain how proteins function in the cell membrane.

• They provide energy for the cell.

• They act as channels and receptors for molecules.

• They store genetic information.

• They produce lipids.

What is the primary role of carbohydrates in the cell membrane?

• To provide structural support

• To facilitate cell recognition and communication

• To transport oxygen

• To store energy

How does cholesterol affect the cell membrane?

• It makes the membrane more flexible.

• It increases the membrane's permeability.

• It helps in the synthesis of proteins.

• It provides energy to the cell.

Contrast osmosis and diffusion by selecting the correct statement.

• Osmosis involves the movement of solutes, while diffusion involves the movement of water.

• Osmosis requires energy, while diffusion does not.

• Osmosis is the movement of water across a semipermeable membrane, while diffusion is the movement of molecules from high to low concentration.

• Both osmosis and diffusion require a membrane.

What is the main difference between diffusion and facilitated diffusion?

• Diffusion requires energy, while facilitated diffusion does not.

• Facilitated diffusion requires a protein channel, while diffusion does not.

• Diffusion occurs only in liquids, while facilitated diffusion occurs in gases.

• Facilitated diffusion moves molecules against the concentration gradient.

Predict what will happen to a cell placed in a hypertonic solution.

• The cell will swell and burst.

• The cell will shrink as water leaves the cell.

• The cell will remain the same size.

• The cell will become more rigid.

What happens to a cell in a hypotonic solution?

• The cell will shrink.

• The cell will swell and may burst.

• The cell will remain unchanged.

• The cell will lose solutes.

Describe the effect of an isotonic solution on a cell.

• The cell will gain water.

• The cell will lose water.

• The cell will remain the same size.

• The cell will become more permeable.

Tags

NGSS.HS-LS1-3