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