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