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