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