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