Cell Structure and Organelles MCQs Quiz 25 Posted on April 6, 2026Author agropublishers 0 1. Genes that promote cell division when activated are called _______. Housekeeping genes Structural genes Tumor suppressor genes Oncogenes 2. Glycosylation of proteins primarily begins in _______ Peroxisome Nucleus Cytosol Rough Endoplasmic Reticulum lumen 3. A chromosomal inversion involves _______ DNA loss Protein folding DNA replication Reversal of segment 4. The size of prokaryotic cells typically ranges from________ to _________ diameter 100 to 500 µm 10 to100 µm 0.1 to 5 µm 10 to 50 µm 5. DNA in eukaryotic cells is typically _______ Single-stranded Absent Linear and associated with histones Circular and naked 6. ATP synthase generates ATP using energy derived from _______ Electrochemical proton gradient Substrate-level phosphorylation Light reactions Direct glucose breakdown 7. Reactive oxygen species (ROS) include which of the following? Lipids and proteins DNA and RNA Superoxide anion (O₂•⁻) and hydrogen peroxide (H₂O₂) Glucose and ATP 8. The basic structure of the plasma membrane is a _______ Protein monolayer Phospholipid bilayer Carbohydrate bilayer Nucleic acid matrix 9. Which component most directly regulates the fluidity of the plasma membrane? DNA in the nucleus Cytoskeletal actin filaments beneath the membrane Cholesterol Ribosomal RNA in the cytoplasm 10. Cancer is fundamentally characterized by _______. Reduced metabolism Controlled cell division Enhanced apoptosis Unregulated cell proliferation Loading … Question 1 of 10
