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. Which organelle, similar to mitochondria, contains its own genetic material? Nucleolus Vacuole Ribosome Chloroplast 2. During photosynthesis, chloroplasts primarily absorb which gas? Oxygen (O₂) Nitrogen (N₂) Carbon dioxide (CO₂) Hydrogen (H₂) 3. The light-dependent reactions of photosynthesis occur in the ____________ Stroma Thylakoid membranes Cytosol Nuclear envelope 4. What is the approximate molecular weight of the nuclear pore complex in mammalian cells? ~1 kDa ~50 kDa ~500 kDa ~120 MDa 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 contains no lipids It has metal-enriched proteins 6. Centrioles are composed of microtubules made of ____________, arranged as triplets in a characteristic 9×3 pattern Elastin Actin Collagen Tubulin 7. ___________________ is involved in intracellular transport Endoplasmic reticulum Nucleus Chloroplast Lysosome 8. __________________ is involved in autolysis through digestive enzymes Lysosome Mitochondria Golgi body Ribosome 9. Chromatin is composed of DNA wrapped around which protein complexes? Enzyme complexes Transport proteins Histones Ribosomal proteins 10. The thylakoid membranes in chloroplasts contain which pigment-protein complexes? Hemoglobin complexes Photosystems Cytochrome P450 ATP synthase only Loading … Question 1 of 10 Cell Structure and Organelles MCQs Quiz 23 Cell Biology Multiple Choice Questions
