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