Photosynthesis

A

Stroma

B

Lamella

C

Thylakoid

D

Granum

E

Inner membrane

F

Outer membrane

Functions of starch grains in chloroplasts?

Soluble sugars which are made in photosynthesis can be stored

Function of the grana

Creates a large surface area so lots of light can be absorbed

What’s the light dependent reaction?

Uses energy from the sunlight to make ATP and reduced NADP for use in light independent stage

What’s the light independent reaction?

Includes the Calvin cycle, which produces organic compounds including glucose

Photolysis

Breaking down of water using light

What’s RuBisCo

A large enzyme which is used in the Calvin Cycle to form a six carbon compound from RuBP and CO2

How many carbons are in RuBP

Five

How many carbons are in GP

Three

How many carbons are in TP

Three

What inhibits RuBisCO

Oxygen

How to plant cells stop RuBisCO being inhibited?

They produce many RuBisCO enzymes so that there’s enough that come can be inhibited

What are the inhibiting factors?

Carbon dioxide, temperature, light intensity and light wavelength

Is water availability a limiting factor?

No

How to measure rate of photosynthesis?

Measure oxygen production in aquatic plants, very difficult in land based plants