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MDCAT
Biology
2021

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

In bacterias, name the colour of light which is responsible for photosynthesis?

Options
  • A

    Ultra-Violet

  • B

    Blue

  • C

    Red

  • D

    None of the above options is correct

Explanation

Option A: Ultraviolet light is a different type of light and can not be seen by the naked eye hence it does not have a colour therefore this is not the correct option.

Option B: The pigment in bacteria that is responsible for photosynthesis is light-green to blue-green. This is the colour they show hence this cannot be the colour they absorb.

Option C: The pigment itself is blueish green therefore it absorbs red light. This option is correct.

Option D: Option C is correct.

Ultraviolet light is a different type of light and cannot be seen by the naked eye; hence, it does not have a color. Therefore, this is not the correct option.

The pigment in bacteria responsible for photosynthesis is light green to blue-green. This is the colour they show hence this cannot be the colour they absorb.

The pigment itself is blueish green therefore it absorbs red light. This option is correct.

Option C is correct so this option is incorrect.

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Tagged under Biology · Bioenergetics · 2021