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