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