Cell Structure and Organelles MCQs Quiz 21 Posted on April 4, 2026April 5, 2026Author agropublishers 0 Cell Structure and Organelles MCQs Quiz 21 Cell Biology Multiple Choice Questions 1. Plasmodesmata are microscopic channels, involved in _______ Cell-to-cell communication Transport across the membrane Cell wall synthesis Protein degradation 2. _____________________ are considered the major organelle source of reactive oxygen species (ROS) in eukaryotic cells Dysfunctional Mitochondria Dysfunctional Lysosome Dysfunctional Vacuole Dysfunctional Golgi apparatus 3. _____________ enzyme is characteristic of peroxisomes and breaks down hydrogen peroxide Pepsin Catalase Lipase Amylase 4. Organelle fractionation in cell begins with disruption of _______ Mitochondrial membrane Golgi vesicles Plasma membrane Nuclear envelope 5. Marker enzyme to identify mitochondria in biochemical studies is typically _______ DNA polymerase Catalase Succinate dehydrogenase Amylase 6. Microbodies include _______ Mitochondria and chloroplasts Vacuoles, ER and Golgi Lysosomes, peroxisomes, glyoxysomes Nucleus and ribosomes 7. ____________________ is absent in prokaryotic cells Endoplasmic reticulum Ribosome Cytoplasm Cell membrane 8. The middle lamella in plants is rich in _______ Pectin Lignin Cellulose Hemicellulose 9. First organelle to sediment during low-speed centrifugation is _______ Ribosome Nucleus Peroxisome Mitochondria 10. _____________ contains highest concentration of digestive enzymes Lysosome Golgi apparatus Nucleus Peroxisome Loading … Question 1 of 10 Cell Structure and Organelles MCQs Quiz 21 Cell Biology Multiple Choice Questions
