Photosynthesis In Higher Plants Question 73

Question: The rate of photosynthesis of a freshwater plant is measured using five spectral colours. Which sequence of colours would give an increasing photosynthetic response? smallest $ \to $ largest response

Options:

A) Blue Green Yellow Orange Red

B) Green Yellow Orange Red Blue

C) Red Orange Yellow Green Blue

D) Yellow Green Orange Blue Red

Show Answer

Answer:

Correct Answer: B

Solution:

[b] Photosynthesis occurs most efficiently with red or blue light because the chlorophyll pigments can absorb light maximally at these wavelengths and the least at green light.