Photosynthesis and plant pigments and chlorophyll

Question 1

What part of plant cell does photosynthesis take place?

Answer 1

chloroplasts.

Question 2

Whats the equation for photosynthesis?

Answer 2

carbon dioxide + water —-> glucose + oxygen,

Co_2 +H_2O ——-> C_6H_12O_6 + O_2

_ represent small numbers at bottom.

Question 3

What do plants use glucose for?

Answer 3

Respiration - turns glucose into other useful substances

Making cell walls - changed to cellulose

Making amino acids

Stores as oils or fats for storing in seeds.

Stored as starch for when photosynthesis isn’t happening.

Question 4

What is the rate of photosynthesis affected by?

Answer 4

light temperature and co2

Chlorophyll can also be a limiting factor as less due to disease or lack of nutrients can make it so plant can’t absorb as much light.

Question 5

How does the oxygen production showing the rate of photosynthesis in a plant practical work?

Answer 5

ruler used to measure a set distance from pond weed.
Light placed at the distance,
Pondweed is left to photosynthesise for a set amount of time, and oxygen bubbles will collect in capillary tube.
At end of experiment, the syringe is used to free gas bubble in the tube up alongside a ruler.
Length of gas bubble is measured.
Length of gas bubble tells you how much oxygen has been produced during that amount of time.