AP Biology - Unit 2 review

Front

What increases membrane fluidity?

Back

A greater proportion of unsaturated phospholipids increases membrane fluidity.

Front

What is the osmotic potential (Ψp) of a plant cell with Ψs of -7.5 bars in a solution with Ψs of -4 bars?

Back

The osmotic potential (Ψp) is 3.5 bars.

Front

What happens to red blood cells when distilled water is transfused into a patient?

Back

The patient's red blood cells will swell because the blood fluid has become hypotonic compared to the cells.

Front

Which of the following is not found in all forms of life?

Back

Nuclei are not found in all forms of life.

Front

What is osmosis?

Back

Osmosis is the movement of water across a cell membrane from high to low concentration.

Front

Define membrane fluidity.

Back

Membrane fluidity refers to the viscosity of the lipid bilayer of a cell membrane, affecting its permeability and the movement of proteins within it.

Front

What role do ribosomes play in cells?

Back

Ribosomes are responsible for protein synthesis in all living cells.

Front

What is the significance of plasma membranes in cells?

Back

Plasma membranes protect the cell and regulate the movement of substances in and out.

Front

Explain the concept of hypertonic solutions.

Back

A hypertonic solution has a higher concentration of solutes compared to another solution, leading to water moving out of cells.

Front

What is the difference between hypotonic and hypertonic solutions?

Back

Hypotonic solutions have a lower concentration of solutes compared to another solution, causing cells to swell, while hypertonic solutions have a higher concentration, causing cells to shrink.