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Answer: 3. Lysosomes

Lysosomes are single-membrane sacs, so the answer is option 3.

  • Mitochondria and chloroplasts are enclosed by a double membrane (outer and inner).
  • The nucleus has a double-layered nuclear envelope.
  • Lysosomes, like vacuoles, Golgi bodies and ER, have only one limiting membrane.
Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report
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