Biology paper 2

Question 1

What is the purpose of the Xylem?

Answer 1

Is to transport water mineral ions.

Question 2

Equation for photosynthesis and respiration (aerobic + anaerobic)

Answer 2

6CO2 + 6H20 —> C6H12O6 + 6O2

6O2 + C6H12O6 —> 6CO2 + 6H20 + energy

C6H12O6 —> lactic acid + energy

Question 3

Limiting factors of photosynthesis + definition

Answer 3

Limiting factor = something that reduces / limits the rate reaction

• Light intensity
• CO2 concentration / abundance
• Temperature

Question 4

why does temperature limit the reaction?

Answer 4

Enzymes denture beyond it’s optimum

Decreases rate of photosynthesis