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Free Levels of Biological Organization MCQs with Answers

5 Levels of Biological Organization MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.

Biological organization progresses from atoms and molecules to organelles, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystems and the biosphere. The topic examines how each level is built from the one below it and how interactions produce emergent properties not present in isolated parts.

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5 questions

1. Which of the following shows the CORRECT order of biological levels of organisation fromcomplex to simple?

  • A. Spleen → Leucocyte → Mitochondria → Adenine
  • B. Mitochondria → Spleen → Leucocyte → Adenine
  • C. Mitochondria → Adenine → Leucocyte → Spleen
  • D. Spleen → Leucocyte → Adenine → Mitochondria

Explanation: The correct order of biological organization from complex to simple is: Spleen → Leucocyte → Mitochondria → Adenine.

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Correct answer: Spleen → Leucocyte → Mitochondria → Adenine

2. Following is the largest organ in human body.

  • A. Skin
  • B. Liver
  • C. Large intestine
  • D. Both A and B

Explanation: Skin covers our entire body hence has the largest surface area out of all the organs.

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Correct answer: Skin

3. Which of the following is the lowest level of biological organization with respect to others?

  • A. Multicellular organisms
  • B. Biosphere
  • C. Species
  • D. Population

Explanation: Option A is correct since Multicellular organism level is the lowest that consist only one organism.Option B is incorrect because…

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Correct answer: Multicellular organisms

4. The part of the body which forms a structural and functional unit and is composed of more than one tissue is called

  • A. Organ
  • B. Organelle
  • C. Organ system
  • D. Whole organism

Explanation: An organ is defined as a collection of tissues, which combine to form a functional unit within the body, specialized at carrying out a…

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Correct answer: Organ

5. In humans, the largest body organ is:

  • A. Liver
  • B. Skin
  • C. Brain
  • D. Lungs

Explanation: The largest organ in the human body is the skin. It covers and protects our entire body, acting as a barrier against external elements.

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Correct answer: Skin
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Levels of Biological Organization MCQs: common questions

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