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