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