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