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