Cell Structure and Organelles MCQs Quiz 27 Posted on April 6, 2026Author agropublishers 0 1. The hydrophobic tails of phospholipids in plasma memberane, are oriented _______ Facing water Toward the interior of the bilayer Toward the nucleus Facing outward 2. The primary structural unit of chromatin is the _______ Gene Nucleosome Ribosome Chromosome 3. Which domain(s) include prokaryotic organisms? All of these Fungi and Plantae Eukarya only Bacteria and Archaea 4. Chlorophyll is localized in _______ Stroma Cristae Outer membrane of chloroplast Thylakoid membranes 5. Microvilli increase the cell’s ____________ Rate of nuclear DNA replication Total cytosolic volume Surface area for absorption Plasma membrane thickness 6. 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) 7. Which of the following is present in both prokaryotic and eukaryotic cells? Ribosomes Nucleus Chloroplast Mitochondria 8. ____________ enzyme is responsible for decomposition of hydrogen peroxide in peroxisomes Hydrolase Oxidase Catalase Peroxidase 9. The internal organization of a prokaryotic cell is best described as _______ Non-compartmentalized Highly compartmentalized Membrane-segregated Organelle-rich 10. Ribosomes found in the cytoplasm of eukaryotic cells a sedimentation coefficient of _______ 80S (composed of 60S + 40S subunits) 70S (composed of 50S + 30S subunits) 55S (mitochondrial ribosomes) 100S (dimerized prokaryotic ribosomes) Loading … Question 1 of 10
