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