Question

"Different wavelengths of light are used to illuminate a tube containing a suspension of photosynthetic algal cells. The percentage of light absorbed and the rate of photosynthesis are measured using the apparatus shown in Figure 5.

What measurements should be taken to determine the rate of photosynthesis? (1)"
a) Measure the angle of light incidence on the tube.
b) Measure the light absorbed and the rate of photosynthesis.
c) Measure the color of the algal cells in the tube.
d) Measure the length of the tube.

Answer 1

To determine the rate of photosynthesis in a suspension of photosynthetic algal cells, the measurements that should be taken are the percentage of light absorbed and the rate of photosynthesis.

Step-by-step explanation:

In order to determine the rate of photosynthesis in a suspension of photosynthetic algal cells, the percentage of light absorbed and the rate of photosynthesis should be measured. These measurements can be taken using a spectrophotometer, which can differentiate which wavelengths of light a substance can absorb. By using this instrument, scientists can identify which wavelengths of light the algal cells can absorb and determine their rate of photosynthesis.