Cell Structure and Organelles MCQs Quiz 4 Posted on April 2, 2026April 5, 2026Author agropublishers 0 Cell Structure and Organelles MCQs Quiz 4 Cell Biology Multiple Choice Questions 1. Cytokinesis in eukaryotic cells is primarily driven by ____________ DNA condensation Actin filaments forming a contractile ring Tubulin microtubules RNA synthesis 2. Heterochromatin is typically ___________ Transcriptionally inactive and highly condensed RNA-based ATP-based Active storage proteins 3. Mannose-6-phosphate (M6P) serves as a signal for targeting proteins to the __________ Endoplasmic reticulum Mitochondria Nucleus Lysosome 4. Centrosome duplication in the cell cycle occurs during _____________ M phase G1 phase G2 phase S phase 5. The Calvin cycle (carbon fixation pathway) occurs in the ___________ Mitochondrial matrix Stroma of chloroplasts Cytosol Thylakoid lumen 6. Lysosomal enzymes function optimally at __________ Alkaline pH Acidic pH pH independent Neutral pH 7. RuBisCO catalyzes the process of ____________ CO₂ fixation Protein folding ATP synthesis DNA replication 8. Nuclear pores primarily regulate _____________ DNA replication Protein folding ATP synthesis Selective transport 9. Peroxisomes are characterized by the presence of ___________ ATP synthase Ribosomes Catalase and other oxidative enzymes DNA polymerase 10. C₄ plants reduce photorespiratory losses primarily by ___________ Minimizing photorespiration Increasing DNA replication Enhancing ATP synthesis Reducing protein folding Loading … Question 1 of 10 Cell Structure and Organelles MCQs Quiz 4 Cell Biology Multiple Choice Questions
