Topic 3- Photosynthesis

Question 0

What are the 2 stages if photosynthesis?

Answer 0

The light dependant stage

Carbon fixation

Question 1

What is photosynthesis?

Answer 1

He process through which green plants can turn light energy into chemical energy(food)

Question 2

In which stage does a series of enzyme controlled reactions take place?

Answer 2

Both stages

Question 3

What is the word equation for the light dependant stage?

Answer 3

Sunlight
                 ⬇️absorbed by chlorophyll 
Oxygen⬅️Water➡️hydrogen
                ⬇️
           ADP+Pi➡️ATP

Question 4

What is the oxygen in the light dependant stage called?

Answer 4

A byproduct

Question 5

Where does the oxygen go?

Answer 5

Released into the air

Question 6

Where does the hydrogen go from the LD stage?

Answer 6

Into the carbon fixation stage

Question 7

Where does the ATP go from the LD stage?

Answer 7

Into the carbon fixation stage

Question 8

What happens to the light energy from the sun?

Answer 8

The light energy from the sub is trapped by a pigment found in the chloroplasts of leaf plant cells called chlorophyll

Question 9

What happens to the trapped light energy?

Answer 9

The light energy is used to split a molecule of water into hydrogen and oxygen

Question 10

What happens when the water splits?

Answer 10

Chemical energy (in the form of ATP) is made from ADP+Pi

Question 11

What happens to the oxygen split from the water?

Answer 11

It diffuses out of the cell and into the atmosphere

Question 12

What happens to the hydrogen split from the water?

Answer 12

It is picked up by a hydrogen acceptor molecule

Question 13

What is a summary of the carbon fixation stage?

Answer 13

Carbon fixation involves a series of enzyme controlled reactions that convert the gas carbon dioxide into the sugar glucose

Question 14

What is the word equation for photosynthesis?

Answer 14

Carbon dioxide+water

Light energy⬇️chlorophyll

Glucose+Oxygen

Question 15

What 3 things can the glucose produced be used for?

Answer 15

1. Respiration
2. Stored as starch
3. Structural carbohydrate cellulose(in cell wall)

Question 16

What is a limiting factor?

Answer 16

Something that holds up a process because it is in short supply

Question 17

If light intensity is limited what stage would it effect?

Answer 17

The light dependant stage and because this stage doesn’t happen then there is no hydrogen or ATP for the second stage so that won’t be able to occur either

Question 18

If carbon dioxide is limiting then which stage would it effect?

Answer 18

The carbon fixation stage

Question 19

If temperature was limiting then which stage would this be effecting?

Answer 19

Both stages as the enzyme requiring reactions would be affected