11.1 Overview of photosynthesis

Question 1

How is the leaf adapted for photosynthesis?

Answer 1

Broad and flat- large surface area to absorb light
Thin- increases rate of diffusion due to short diffusion pathway
Palisade cells contain many chloroplast which absorb light
Numerous stomata that allow Co2 to enter and respond to light intensity
Arranged to minimise overlapping- minimises one leaf shadowing another

Question 2

What is the overall equation for photosynthesis?

Answer 2

6CO2 + 6H2O → C6H12O6 + 6O2

Question 3

What are the 3 main stages of photosynthesis?

Answer 3

1. Capturing of light energy
2. Light dependant reaction
3. Light independant reaction

Question 4

Structure and function of the grana

Answer 4

Stacks of thylakoids
Light dependant reaction takes place here
Chlorophyll is within thylakoids

Question 5

Structure and function of the stroma

Answer 5

Fluid filled matrix where the light independent stage of photosynthesis takes place