Photosynthesis

Which of the following parts of the plant, when removed, will cause the rate of photosynthesis in the plant to slow down or stop?

A roots

B fruits

C flower

D leaves

• D only

• A and D only

• B and C only

• A, B, C and D

Dory set up an experiment in a dark room as shown below.After some time, Dory observed bubbles escaping from the water plant.

What gas would the bubbles most likely contain?

• oxygen

• nitrogen

• water vapour

• carbon dioxide

Study the diagram carefully. In which set-up A, B, C or D will there be the least amount of carbon dioxide after several hours?

• A

• B

• C

• D

Which one of the following organisms does not carry out photosynthesis?

• Fern

• Moss

• Orchid

• Mushroom

1. In the picture above, different thickness of the stem are cut and removed as shown.Identify the leaves which are still able to make their own food.

• A only

• B and C only

• A and D only

• None of them

Siti conducted starch test on the four leaves A, B, C and D she identified above. The results showed that leaves A and D turned dark blue but leaves B and C did not.

Which one of the following correctly represents leaves A, B, C and D?

• 
• 
• 
• 

Peiyi placed a table lamp at a distance of 20 cm from the glass jar. After one hour, she observed that the funnel had collected 5cm³ of gas. What must she do if she wants to collect more gas in the funnel?

• Add more baking soda to the water.

• Pluck out more leaves from the water plant.

• Replace the bulb from the table lamp to a brighter one.

• Increase the distance between the table lamp and glass jar.

Which of the following affects the opening and closing of the stoma during photosynthesis.

• Amount of light trapped by the leaves.

• Amount of food made by the leaves.

• Amount of gaseous exchange made by the leaves.

• Amount of water taken in by the plant.

The energy in the food made by plants comes from______________.

• carbon dioxide

• the Sun

• water

• chlorophyll

Which of the following do plants produce during photosynthesis?

• Oxygen only

• Sugar only

• Oxygen and sugar

• Carbon dioxide and sugar