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