Photosynthesis

Question 1

What is the word equation for photosynthesis?

Answer 1

Water + carbon dioxide —> glucose + oxygen

Question 2

Photosynthesis is an exothermic/endothermic reaction

Answer 2

Endothermic

Question 3

What is a endothermic reaction

Answer 3

When energy is taken in from the surroundings

Question 4

Definition of photosynthesis

Answer 4

The conversion of light energy into chemical potential energy in the form of ATP

Question 5

How does plants obtain CO2

Answer 5

• from Air
• CO2 diffuses down the concentration gradient from the environment air
• through the stomata , into air spaces inside leaf
• then diffuses into mesophyll cells

Question 6

How does plants obtain water?

Answer 6

• from soil
• water moves by osmosis down water potential gradient
• from spaces between soil into root hair cell

Question 7

Which organelle does photosynthesis occur

Answer 7

Chloroplasts

Question 8

What is the chemical equation for photosynthesis

Answer 8

C6 H12 O6

Question 9

Limiting factor -

Answer 9

A factor when in short supply that prevents photosynthesis occurring at its maximum rate

Question 10

Name 4 limiting factors

Answer 10

• light
• carbon dioxide
• temperature
• number of chlorophyll

Question 11

What happens to the enzymes when the temperature is to low

Answer 11

• become inactive at very low temperatures

Question 12

What happens when the temperature is above the optimum temperature

Answer 12

• enzymes denature
• causes rate of photosynthesis to decrease to zero

Question 13

What are the uses for glucose:

Answer 13

• respiration to transfer energy from glucose to other molecules
• convert into insoluble starch for storage (starch does not affect water potential )
• Convert into lipids for storage in seeds and tubers
• convert into amino acids : glucose combined nitrate ions produce amino acids.
  chain of amino acids to make protein