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