Cell Structure and Organelles MCQs Quiz 27 Posted on April 6, 2026Author agropublishers 0 1. Which domain(s) include prokaryotic organisms? Fungi and Plantae Bacteria and Archaea Eukarya only All of these 2. Which complex of the electron transport chain does NOT directly pump protons? Complex III (Cytochrome bc₁ complex) Complex IV (Cytochrome c oxidase) Complex II (Succinate dehydrogenase) Complex I (NADH:ubiquinone oxidoreductase) 3. The internal organization of a prokaryotic cell is best described as _______ Non-compartmentalized Organelle-rich Membrane-segregated Highly compartmentalized 4. Chlorophyll is localized in _______ Stroma Cristae Outer membrane of chloroplast Thylakoid membranes 5. The primary structural unit of chromatin is the _______ Chromosome Nucleosome Gene Ribosome 6. Which of the following is present in both prokaryotic and eukaryotic cells? Ribosomes Nucleus Mitochondria Chloroplast 7. Ribosomes found in the cytoplasm of eukaryotic cells a sedimentation coefficient of _______ 100S (dimerized prokaryotic ribosomes) 55S (mitochondrial ribosomes) 80S (composed of 60S + 40S subunits) 70S (composed of 50S + 30S subunits) 8. Microvilli increase the cell’s ____________ Surface area for absorption Total cytosolic volume Rate of nuclear DNA replication Plasma membrane thickness 9. The hydrophobic tails of phospholipids in plasma memberane, are oriented _______ Facing water Facing outward Toward the interior of the bilayer Toward the nucleus 10. ____________ enzyme is responsible for decomposition of hydrogen peroxide in peroxisomes Catalase Hydrolase Oxidase Peroxidase Loading … Question 1 of 10
