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