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