Plant Cells QuizOnline version Study plant cell parts by Wen Ze Go 1 Which organelle is the site of photosynthesis in plant cells? a Ribosome b Nucleus c Mitochondria d Chloroplasts 2 What is the rigid layer that provides structural support in plant cells? a Cell wall b Cytoplasm c Vacuole d Cell membrane 3 Which organelle stores water and helps maintain turgor pressure? a Golgi apparatus b Peroxisome c Central vacuole d Lysosome 4 Which pigment gives plants their green color and participates in photosynthesis? a Chlorophyll b Xanthophyll c Carotene d Anthocyanin 5 Which organelle generates most of the cell’s usable energy (ATP)? a Nucleus b Ribosomes c Chloroplasts d Mitochondria 6 What connects plant cells and allows transport between them? a Tight junctions b Gap junctions c Plasmodesmata d Desmosomes 7 Which organelle modifies, sorts, and packages proteins for secretion or delivery? a Ribosome b Golgi apparatus c Endoplasmic reticulum d Vacuole 8 Which cellular structure is the site of protein synthesis? a Ribosome b Mitochondria c Chloroplasts d Golgi apparatus 9 What is the primary component of the plant cell wall? a Protein b Lipid c Cellulose d DNA 10 Which organelle detoxifies peroxides and participates in lipid metabolism in plant cells? a Chloroplast b Peroxisome c Lysosome d Vacuole