Topic 3 - Photosynthesis

Question 1

What is the equation for photo synthesis? (Write it down)

Answer 1

Carbon dioxide + water
——>
Oxygen and glucose

Question 2

What are the reactants of photosynthesis

Answer 2

Carbon dioxide and water

Question 3

What are the products of photosynthesis

Answer 3

Oxygen and glucose

Question 4

In photosynthesis what does chlorophyll do?

Answer 4

Used to pick up the energy from the sunlight

Question 5

What are the limiting factors of photosynthesis

Answer 5

Temperature
Light
Carbon dioxide

Question 6

What do plants use glucose for

Answer 6

Cellulose cell walls
Respiration
Turned into starch for storage

Question 7

What is the a leaf placed into to remove the chlorophyll?

Answer 7

Ethanol

Question 8

How do you test a leaf for starch?

Answer 8

Place the leaf in boiling water to break down the cell membrane and kill the leaf
Place the leaf in boiling ethanol to remove the green pigment called chlorophyll. The leaf will go white
Place the leaf in water to soften it
Place the leaf on a clear tile and pipette iodine solution on it

Question 9

What colour will the leaf go if starch is present?

Answer 9

Blue black

Question 10

What colour will the leave be if no starch is present

Answer 10

Remain orangey brown

Question 11

What is photosynthesis

Answer 11

This is how plants use sunlight to make glucose

Question 12

What does sodium hydroxide do?

Answer 12

Absorb carbon dioxide

Question 13

If there is no C02 present what happens to the rate of photosynthesis

Answer 13

No photosynthesis occurs