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