Cell Structure and Organelles MCQs Quiz 23 Posted on April 5, 2026April 5, 2026Author agropublishers 0 Cell Structure and Organelles MCQs Quiz 23 Cell Biology Multiple Choice Questions 1. Which organelle, similar to mitochondria, contains its own genetic material? Nucleolus Vacuole Chloroplast Ribosome 2. What is the approximate molecular weight of the nuclear pore complex in mammalian cells? ~50 kDa ~500 kDa ~120 MDa ~1 kDa 3. The thylakoid membranes in chloroplasts contain which pigment-protein complexes? Cytochrome P450 Photosystems ATP synthase only Hemoglobin complexes 4. During photosynthesis, chloroplasts primarily absorb which gas? Hydrogen (H₂) Oxygen (O₂) Carbon dioxide (CO₂) Nitrogen (N₂) 5. Why doesn’t the lysosomal membrane get digested by its own enzymes? It is composed of metal-enriched cellulose It has metal-enriched proteins It has highly glycosylated proteins protecting it It contains no lipids 6. ___________________ is involved in intracellular transport Lysosome Chloroplast Nucleus Endoplasmic reticulum 7. Chromatin is composed of DNA wrapped around which protein complexes? Ribosomal proteins Histones Transport proteins Enzyme complexes 8. __________________ is involved in autolysis through digestive enzymes Lysosome Golgi body Mitochondria Ribosome 9. Centrioles are composed of microtubules made of ____________, arranged as triplets in a characteristic 9×3 pattern Tubulin Actin Elastin Collagen 10. The light-dependent reactions of photosynthesis occur in the ____________ Nuclear envelope Stroma Cytosol Thylakoid membranes Loading … Question 1 of 10 Cell Structure and Organelles MCQs Quiz 23 Cell Biology Multiple Choice Questions
