First slide

Early Experiments

Question

One scientist cultured Cladophora in a suspension of Azotobacter and illuminated the culture by splitting light through a prism. He observed that bacteria accumulated mainly in the region of:

Easy

A

Violet and green light
B

Indigo and green light
C

Orange and yellow light
D

Blue and red light

Solution

Azotobacter bacteria were used to detect the sites of $O_{2}$ evolution. Photosynthesis is maximum in blue and red light. Therefore, bacteria accumulated mainly in these two regions.

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