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