Photosynthesis

Question 1

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-dependent
reaction.

Answer 2

• chlorophyll absorbs light
• electrons are lost

Question 3

Explain why a decrease in the light dependent reaction will lead to decrease in the light independent reaction

Answer 3

• Less ATP
• Less reduced NADP

Question 4

Explain why a decrease in the activity of the enzyme rubisco would limit the rate of
photosynthesis.

Answer 4

-Less carbon dioxide reacts with RuBP
-Less GP

Question 5

Where precisely is rubisco found in a cell?

Answer 5

Stroma

Question 6

Describe the effect of light energy in the light-dependent reaction of photosynthesis.

Answer 6

excites chlorophyll / electrons; release electron(s);

Question 7

function of ATP in light independent reaction

Answer 7

provides the energy to reduce GP / convert GP to TP / TP to RuBP / provides phosphate to convert TP to RuBP;

Question 8

function of NADPH in light independent reaction

Answer 8

reduces GP / to change GP to TP