B2.3.1 Photosynthesis

Question 1

What are the reactants needed for photosynthesis?

Answer 1

Water and Carbon dioxide

Question 2

What are the products of photosynthesis?

Answer 2

Glucose and oxygen

Question 3

Which type of energy is essential for photosynthesis to take place?

Answer 3

Light energy

Question 4

Which organelle (part of a cell) carries out photosynthesis?

Answer 4

Chloroplast

Question 5

What is the name of the green substance which captures light energy (and is found in chloroplasts) to enable photosynthesis?

Answer 5

Chlorophyll

Question 6

Where does the water, required by plants, come from?

Answer 6

The soil

Question 7

What three factors can limit the rate of photosynthesis?

Answer 7

Light intensity
Carbon dioxide concentration
Temperature

Question 8

How is 4 ways glucose used by plants and algae?

Answer 8

Respiration
To produce fats and oils
To make cellulose (which strengthens cell walls) To synthesise (make) proteins

Question 9

What else do plants need to absorb from the soil to produce proteins?

Answer 9

Nitrate ions

Question 10

What do plants store glucose as?

Answer 10

Insoluble starch

Question 11

List three things you can do in a greenhouse to increase growth.

Answer 11

Artificial light - allows photosynthesis to continue at night
Heating - allows photosynthesis to continue at an increased rate and the heater can also release extra carbon dioxide.