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