Photosynthesis

Which diagram shows the result of the experiment?

• A

• B

• C

• D

Which substance, needed for protein synthesis, is carried into a leaf from the stem?

• carbon dioxide

• nitrate

• oxygen

• starch

Which two substances are the products of photosynthesis?

• carbon dioxide and glucose

• carbon dioxide and water

• oxygen and carbon dioxide

• oxygen and glucose

Four test-tubes are set up as shown in the diagram and left in full sunlight.

After several hours, which test-tube contains the most dissolved oxygen?

• A

• B

• C

• D

Plants manufacture their own supplies of carbohydrate.

What are the raw materials and the waste product of this process?

• A

• B

• C

• D

A plant with variegated leaves has the starch removed from its leaves by placing it in a dark cupboard for 48 hours.

Black paper is then fixed on one leaf as shown and the plant is exposed to light.

After 24 hours, which part of the leaf contains starch?

• A

• B

• C

• D

Which diagram shows the result of the test?

• A

• B

• C

• D

What happens to the limewater in flasks X and Y when the pump is switched on?

• A

• B

• C

• D

Which type of cell is found in layer X?

• A

• B

• C

• D

An experiment was done using the apparatus shown in the diagram.

The carbon dioxide content of the water in each tube was measured at the start and again three hours later.

In which tube would there be a decrease in carbon dioxide content?

• A

• B

• C

• D