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