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