Cell Structure and Organelles MCQs Quiz 26 Posted on April 6, 2026Author agropublishers 0 1. Lysosomal enzymes function optimally at _______ pH Variable Alkaline Acidic Neutral 2. Phospholipids are classified as amphipathic because they _______ Contain only lipids Are composed of proteins and sugars Are fully hydrophobic Have both hydrophilic and hydrophobic regions 3. Which factor determines the permeability of molecules across the membrane? Color of molecule Size and polarity of molecules Charge only DNA sequence 4. Small molecules cross the nuclear envelope mainly by _______ through nuclear pores Endocytosis Active transport Vesicular transport Passive diffusion 5. The genetic material in prokaryotes is primarily located in the _______ Golgi body Nucleoid region Mitochondria Nucleus 6. Prokaryotic ribosomes have a sedimentation coefficient of _______ 60S 80S 90S 70S 7. An increase in the inner mitochondrial membrane’s permeability to protons would _______. Increase ATP production Decrease ATP yield per molecule of substrate due to uncoupling Halt glycolysis in the cytosol Enhance NADH oxidation 8. The size of eukaryotic cells typically ranges from________ to _________ diameter 10 to100 µm 10 to 500 µm 0.1 to 5 mm 100 to 500 µm 9. In chromosomes, deletion results in _______ Protein folding Gain of DNA Replication Loss of segment 10. Mitochondrial inner membrane is specialized for _______ DNA packaging Lipid storage Protein secretion ATP generation via oxidative phosphorylation Loading … Question 1 of 10
