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