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MDCAT
Biology
2005

Biology · Bioenergetics

Work through this past-paper style MCQ, then read the full explanation. Practice more biology questions on mMCQ with adaptive practice and topic analytics.

Question

Which is least important in photosynthesis?

Options
  • A

    Red light

  • B

    Blue light

  • C

    Sunlight

  • D

    Green light

Explanation

Greenlight range spectrum is considered as least effective for the process of photosynthesis:

The wavelength of green light is thought to be the least efficient for photosynthesis. If the plants are exposed to green wavelengths during photosynthesis, the rate of photosynthesis will be the slowest. This is due to the presence of chlorophyll, a green pigment. Instead of being absorbed by the chlorophyll, the green light is transmitted and reflected. The best visible light wavelengths for photosynthesis are blue (425–450 nm) and red (600–700 nm).

The wavelength of green light is thought to be the least efficient for photosynthesis, hence this option is incorrect.

The wavelength of green light is thought to be the least efficient for photosynthesis, hence this option is incorrect. 

The wavelength of green light is thought to be the least efficient for photosynthesis, hence this option is incorrect. 

Greenlight range spectrum is considered as least effective for the process of photosynthesis:

The wavelength of green light is thought to be the least efficient for photosynthesis. If the plants are exposed to green wavelengths during photosynthesis, the rate of photosynthesis will be the slowest. This is due to the presence of chlorophyll, a green pigment. Instead of being absorbed by the chlorophyll, the green light is transmitted and reflected. The best visible light wavelengths for photosynthesis are blue (425–450 nm) and red (600–700 nm). 

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Tagged under Biology · Bioenergetics · 2005