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