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