Cell Structure and Organelles MCQs Quiz 29 Posted on April 6, 2026Author agropublishers 0 1. The cytoplasm of prokaryotes includes _______. Ribosomes Cytosol and suspended molecules Enzymes DNA 2. Transcription is the biological process of _______ from a DNA template DNA duplication ATP production RNA synthesis Protein synthesis 3. The DNA of most prokaryotes is typically _______ Circular and single Linear and multiple Fragmented Linear and single 4. Which organelle is generally absent in prokaryotic cells _______ Ribosome Nucleus Cytoplasm Cell membrane 5. Which statement best describes the role of NADH in cellular ATP production? NADH directly phosphorylates ADP to make ATP NADH stores the high-energy phosphate bonds of ATP NADH inhibits ATP synthase to regulate its activity NADH donates electrons to Complex I of the electron transport chain 6. In the phospholipid bilayer of the plasma membrane, the hydrophilic (polar) heads are oriented ___________ Toward the aqueous environments on both the extracellular and cytoplasmic sides Toward the hydrophobic fatty-acid tails in the membrane interior Away from any aqueous environment, facing only each other Randomly, with no consistent orientation 7. Catalase is a highly efficient antioxidant enzyme found in nearly all aerobic organisms, it detoxifies hydrogen peroxide (H₂O₂) by converting it into _______ Water and Carbon dioxide Oxygen and carbon monoxide Carbon dioxide and water Water and oxygen 8. The final electron acceptor in aerobic respiration, essential for ATP production, is _______ NAD⁺ Carbon dioxide Oxygen Glucose 9. The cytosol primarily consists of _______ Lipids only Water, ions, and macromolecules DNA and RNA only Proteins only 10. The cytoplasm in prokaryotes primarily consists of _______. Organelles Membrane stacks Nuclear matrix Cytosol with suspended components Loading … Question 1 of 10
