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