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