Question 9 – Photosynthesis - OCR A Biology Questions

An investigation was carried out into the effect of light intensity on the concentrations of ribulose bisphosphate (RuBP) and glycerate 3-phosphate (GP) present in single-celled algae.

The algae were initially grown under constant, high light intensity. At $2\text{ minutes}$ , the light was switched off completely. The concentrations of RuBP and GP were measured throughout the experiment.

The results are described below:

Before $2\text{ minutes}$ , both RuBP and GP remain at stable, constant levels (GP is at $units4.5\text{ arbitrary units}$ and RuBP is at $units2.0\text{ arbitrary units}$ ).
After the light is switched off ( $2\text{ minutes}$ ), the concentration of GP increases rapidly to a higher level.
After the light is switched off ( $2\text{ minutes}$ ), the concentration of RuBP decreases rapidly to a very low level.

An investigation was carried out into the effect of light intensity on the concentrations of ribulose bisphosphate (RuBP) and glycerate 3-phosphate (GP) present in single-celled algae.

The results are described below:

Before $2\text{ minutes}$ , both RuBP and GP remain at stable, constant levels (GP is at $units4.5\text{ arbitrary units}$ and RuBP is at $units2.0\text{ arbitrary units}$ ).
After the light is switched off ( $2\text{ minutes}$ ), the concentration of GP increases rapidly to a higher level.
After the light is switched off ( $2\text{ minutes}$ ), the concentration of RuBP decreases rapidly to a very low level.

Photosynthesis

Question 7

Photosynthesis

Question 7

Photosynthesis

Question 7

Photosynthesis Questions

Photosynthesis

Question 7

Photosynthesis Questions