Photosynthesis

Question 1

What is the equation for photosynthesis

Answer 1

Carbon dioxide + water — glucose + oxygen

Question 2

What 5 ways do plants use glucose

Answer 2

1. Respiration
2. Making cellulose - making strong plant cell walls
3. Making amino acids - for protein synthesis
4. Stored as oils or fats - for storage
5. Stored as insoluble starch - storage

Question 3

What does glucose need to produce proteins

Answer 3

Nitrate ions absorbed from the soil

Question 4

Where does photosynthesis take place

Answer 4

Chloroplasts that contain chlorophyll that absorb light

Question 5

What kind of reaction is photosynthesis and why

Answer 5

Endothermic

Energy is transferred from the environment (light) to the chloroplasts

Question 6

What is meant by limiting factor

Answer 6

That it’s stopping photosynthesis from happening any faster

Question 7

Factors can have a combined effect on the rate of photosynthesis, but which specific factor is limiting at a particular time depends on what?

Answer 7

Environmental conditions
Eg: night the light is limiting factor
Winter the temperature is a limiting factor
Warm and bright, amount of co2 is limited

Question 8

What 4 things effect the rate of photosynthesis

Answer 8

1. Temperature
2. Light intensity
3. Concentration of co2
4. Amount of chlorophyll

Question 9

How can chlorophyll be a limiting factor

Answer 9

The amount of chlorophyll in a plant can be affected by disease ( TMV)
Environmental stress - lack of nutrients
Can cause chloroplast to not make enough and the rate of photosynthesis is reduced because they can’t absorb as much light