Photosynthesis

Question 1

Give the two chemicals needed for photosynthesis to happen.

Answer 1

Carbon dioxide and water.

Question 2

Give two chemical produced in photosynthesis.

Answer 2

Glucose and oxygen.

Question 3

Name the pigment found in plant cells that absorbs light energy.

Answer 3

Chlorophyll

Question 4

Name the organelle responsible for photosynthesis.

Answer 4

Chloroplasts

Question 5

Where does the light dependent reaction occur?

Answer 5

In the thalakoid membrane (in chloroplasts)

Question 6

Name her splitting of water using light in photosynthesis.

Answer 6

Photolysis.

Question 7

Name the pigment that is photoionised in photosynthesis.

Answer 7

Chlorophyll

Question 8

Name the enzymes used to make ATP.

Answer 8

ATP synthase.

Question 9

In addition to ATP, the light dependent reaction also produces - more substance, which are…?

Answer 9

Oxygen and NADPH (reduced NADP)

Question 10

Outline the Light Independent Reaction process.

Answer 10

1. CO2 fixes to ribulose bisphosphate to form 2 molecules of glycerol three phosphate (GP).
2. This is catalysed by rubisco.
3. ATP and NADPH (provided from the LDR) are used to reduce GP to triode phosphate.
4. 5/6 carbons are used to regenerate RUBP in the Calvin cycle.
5. Whilst 1/6 carbon is converted to useful organic substances eg glucose.

Question 11

Where does the Calvin cycle occur?

Answer 11

In the stroma of chloroplasts

Question 12

What happens for every 6 Calvin cycles?

Answer 12

One hexose sugar (eg glucose) is produced, as one carbon molecule is removed from TP for each Calvin cycle.