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