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