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