Cells

A new cell is being examined.

Which feature would enable you to identify it as a plant cell or an animal cell?

• The cell contains a single large sap vacuole space.

• The cell contains glucose and amino acids.

• The cell contains stored fat.

• The cell surface membrane is partially permeable.

Answer explanation

Only plant cell contain large vacuole. This will help to identify whether it is a plant cell or an animal cell.

The diagram shows a cell from the epidermis of an onion.

Which part allows some, but not all, dissolved substances to pass into or out of the cell?

• A

• B

• C

• D

Answer explanation

B is a cell membrane. It's function is to control movement of substances in and out of the cell. (Allow some substances to enter but not others).

Which structures are present in animal cells?

• A

• B

• C

• D

Answer explanation

Animal cells consists of three parts: cell membrane, cytoplasm and nucleus only. Cell wall is not present in animal cell.

The table shows the main functions of red blood cells and root hair cells.

Which row is correct?

• A

• B

• C

• D

Answer explanation

Function of red blood cell is to transport oxygen. Function of root hair cell is to absorb water and minerals.

The diagrams show some pieces of potato in four sugar solutions with different concentrations of water.

In which solution will the potato piece take up water from the solution and swell?

• A

• B

• C

• D

Answer explanation

There is high water concentration in salt solution than inside the potato piece so water will diffuses from salt solution into the potato piece through a semi - permeable membrane (cell membrane)

Which feature of a root hair cell indicates that it is from a plant and not from an animal?

• cell membrane

• cell wall

• chloroplast

• cytoplasm

Answer explanation

Root hair cell is a plant cell. It has cell wall. Even though plant cell has chloroplast but root hair cell doesn't have chloroplast. So you cannot choose chloroplast. Meanwhile cytoplasm and cell membrane are also present in animal cell.

The diagram shows a plant cell.

Which structure controls the passage of substances into and out of the cell?

• A

• B

• C

• D

Answer explanation

B is cell membrane. It's function is to control movement of substances in and out of the cell.

A piece of plant tissue is transferred from a beaker of water into a 10 % sucrose solution.

What happens?

• A

• B

• C

• D

Answer explanation

There is high water concentration in plant tissue than in 10% sucrose solution so water will diffuses out o the plant tissue into 10% sucrose solution through a semi-permeable membrane (cell membrane)

What is the function of chlorophyll in plants?

• to absorb carbon dioxide

• to absorb light

• to absorb oxygen

• to absorb water

Answer explanation

Chlorophyll is a green pigment found inside chloroplast. This chlorophyll is use to absorb light and uses it to make food for the plant.

Which part of the structure of a root hair cell is the site of uptake of water?

• cell membrane

• cell wall

• cytoplasm

• sap vacuole

Answer explanation

Sap vacuole contains cell sap which supports the plant cell by taking in water.