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