Asked in PMC Practice Test 6 (2021) 2021

What is the approximate diameter of the peroxisome?

Correct answer: A. 0.5 micrometer

  • A. 0.5 micrometer
  • B. 1.5 micrometer
  • C. 2 micrometer
  • D. 1 micrometer

Explanation

Correct option is A. Peroxisomes are 0.1 -- 0.5μm in diameter and are bound by single membranes that enclose dense matrices primarily containing metabolic enzymes (and substrates and cofactors), which can sometimes form structured and electron dense crystalloid cores.

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About Cytoplasmic Organelles

Cytoplasmic organelles are the specialized structures suspended in cytoplasm, including mitochondria, ribosomes, endoplasmic reticulum, Golgi apparatus, lysosomes, vacuoles and centrosomes. Questions compare their structures and functions in animal and plant cells, including chloroplasts and the role of the endomembrane system in transport and secretion.

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