Photosynthesis

Question 1

The light dependant reaction

Answer 1

Uses lights to make ATP and NADH, in Thylakoids, also called photo phosphorylation

Question 2

The light independent reaction

Answer 2

Uses products of LDR to make useful organic products, in stroma, also called Calvin cycle

Question 3

What is the grana

Answer 3

Stack of thylakoid

Question 4

Describe the steps of the light dependant reaction

Answer 4

Chlorophyll absorbs light energy.excites the electrons high leave chlorophyll.electron moves along electron transfer chain. Electron releases energy. Energy used to make ATP. NADPH.

Question 5

What is the light independent reaction also known as

Answer 5

The Calvin cycle

Question 6

Describe the Calvin cycle

Answer 6

CO2 combines with RuBp catalysed by rubisco. Makes 2x GP. GP is reduced to make TP. Using 2xNADPH and 2xATP. The TP is regenerated to RuBp

Question 7

What are the 3 limiting factors of photosynthesis

Answer 7

Light intensity, co2 concentration, temperature

Question 8

How is light a limiting factor

Answer 8

The higher the light intensity the more energy there is for the LDR to take place to the faster the rate of photosynthesis

Question 9

How is co2 the limiting factor

Answer 9

CO2 is commonly the limiting factor during the day, above a certain level the co2 has a negative effect on the rate of photosynthesis

Question 10

How is temperature a limiting factor of photosynthesis

Answer 10

Photosynthesis is controlled by enzymes, if you increase ten you increase the rate of reaction up to the optimum, beyond the optimum the rate decreases