HARD
AS and A Level
IMPORTANT
Earn 100
The following graph shows the effect on the levels of GP (glycerate 3-phosphate) and TP (triose phosphate) in a chloroplast when it is exposed to light, dark and then light again. Describe and explain these results.
Important Questions on Photosynthesis
MEDIUM
AS and A Level
IMPORTANT
Which stage of the photosynthesis is limited by light intensity? Explain.
MEDIUM
AS and A Level
IMPORTANT
Which stage of the photosynthesis is limited by temperature? Explain.
MEDIUM
AS and A Level
IMPORTANT
Which stage of the photosynthesis is limited by carbon dioxide concentration? Explain.
HARD
AS and A Level
IMPORTANT
Explain how the inner membrane system of a chloroplast make it well adapted for photosynthesis.
HARD
AS and A Level
IMPORTANT
Copy the table below and insert ticks and crosses to show which structural features are shared by a plant chloroplast and a typical prokaryotic cell.
= structural feature shared; 
= structural feature not shared
HARD
AS and A Level
IMPORTANT
When isolated chloroplasts are placed in buffer solution with a blue dye such as DCPIP or methylene blue and illuminated, the blue colour disappears. Explain this observation.
MEDIUM
AS and A Level
IMPORTANT
When isolated chloroplasts are placed in buffer solution with a blue dye such as DCPIP or methylene blue and illuminated, the blue colour disappears. Name the compound, normally present in photosynthesis, that is replaced by the blue dye in this investigation.
HARD
AS and A Level
IMPORTANT
Distinguish between non-cyclic and cyclic photophosphorylation.
