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