Question

Which of the following statement is correct?

A

All bacteria are heterotrophic.

B

Bacteria are either heterotrophic or chemoautotrophic.

C

Bacteria are either phototropic or chemotropic.

D

Bacteria are either photoautotrophic or chemoautotropic.

Medium
Solution
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Correct option is C)

  • Phototrophic bacteria are a group of bacteria, whose energy for growth is derived from sunlight and their source of carbon comes from carbon dioxide or organic carbon.
  •  Chemoautotrophs use inorganic energy sources such as hydrogen sulfide, elemental sulfur, ferrous iron, molecular hydrogen, and ammonia. Most chemoautotrophs are extremophiles, bacteria or archaea that live in hostile environments.
  •  Hence, Bacteria are either phototropic or chemotropic is correct.
  • So, the correct answer is 'Bacteria are either phototropic or chemotropic'.

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