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