CPbio Cells and Cell Membrane

What is the process by which water moves across a semi-permeable membrane?

• Osmosis

• Diffusion

• Active transport

• Facilitated diffusion

Susan created a salt and water solution to demonstrate how molecules can move into and out of a potato cell. What is solute in her solution?

• water

• potato

• salt

• solution

How does equilibrium relate to osmosis?

• Equilibrium is reached when the solute concentration is isotonic

• Equilibrium is reached when the cell bursts due to osmotic pressure

• Equilibrium means there is no osmosis occurring

• Equilibrium occurs when the cell gains water indefinitely

Which part of the phospholipid is responsible for repelling water molecules?

• Hydrophobic head

• Hydrophilic tail

• Hydrophobic tail

• Hydrophilic head

What is the primary function of the cell membrane?

• Regulating the passage of materials into and out of the cell

• Providing structural support to the cell

• Storing genetic information

• Producing energy for the cell

The cell membrane is primarily composed of:

• Phospholipids and proteins

• Nucleic acids

• Carbohydrates

• Lipids and polysaccharides

What is the function of the cell wall in plant cells?

• Regulating the passage of materials into and out of the cell

• Providing structural support and protection to the cell

• Synthesizing proteins

• Storing genetic information

Which structure surrounds the cell membrane and provides support and protection to the cell?

• Cell wall

• Nucleus

• Cytoplasm

• Endoplasmic reticulum

What is the function of the vacuole in plant cells?

• Synthesizing proteins

• Storing water

• Site of photosynthesis

• Producing energy for the cell

What happens to a cell when it is placed in a hypertonic solution?

• It swells as water enters the cell

• It shrinks as water leaves the cell

• It remains the same as there is no net movement of water

• It divides into two cells