Cell Bio - key areas 1,2,3 (Nat 5)

Draw and label an animal cell

Answer explanation

Which of the labelled plant cell components are made from cellulose?

• A

• B

• C

• D

Answer explanation

The cell wall is composed of cellulose to provide structure and support to the cell.

What is the function of structure A?

Answer explanation

Contains cell sap/water. Important in maintaining the shape of the cell

Give one difference between a plant and an animal cell

Answer explanation

Plant cell's contain, a cell wall, chloroplasts and a vacuole. Animal cells do not

What is function of chloroplast

Answer explanation

The site of photosynthesis

Which of the labelled plant cell components controls cell activities?

• A

• B

• C

• D

Answer explanation

The nucleus controls cell activities.

What is the definition of diffusion?

Answer explanation

movement of molecules or ions from a region of high concentration to a region of lower concentration

What is the definition of osmosis?

Answer explanation

movement of water molecules from a region of high water concentration to a region of lower water concentration through a selectively permeable membrane.

Which of these substances mainly enter and leave cells by active transport

• Water

• Oxygen

• Glucose

• Sodium/Potassium

Answer explanation

The sodium/potassium pump within the cell membrane allows both sodium and potassium to be transported from an area of low concentration to an area of high concentration by the use of energy

When plant cells undergo osmosis when placed in distilled water, they begin to gain water and swell, the cell wall prevents the plant cell from bursting. We now class the cell as

Answer explanation

When plant cells undergo osmosis when placed in distilled water, they begin to gain water and swell, the cell wall prevents the plant cell from bursting. We now class the cell as