Photosynthesis

Question 1

In photosynthesis,which chemicals are needed for the light dependent reaction

Answer 1

NADP,ADP,PI and water

Question 2

Describe what happens during photoionisation in the light dependant reaction

Answer 2

chlorophyll absorbs light then the chlorophyll becomes positively charged

Question 3

Explain why the student marked the origin using a pencil rather than using ink

Answer 3

Ink and leaf pigments would mix

Question 4

Describe the method the student used to separate the pigments after the solution of pigments had been applied to the origin

Answer 4

1) level of solvent below origin/line
2)stop before the solvent reaches the top

Question 5

The pigments in leaves are different colours. Suggest and explain the advantage of having different coloured pigments in leaves

Answer 5

Absorb more wavelengths of light for photosynthesis

Question 6

Heat stress is a condition that often pccurs in plants exposed to high temperatures for a prolonged period of time. Heat stress is a major favtor in limitting the rate of phtoosynthesis
Explain why this leads to decrease in the light independent reaction

Answer 6

No atp
No reduced NADP