Label A Plant Cell Diagram, Questions And Answers, 4th, 5th, 6th, grade science quiz online. Learn all parts of a plant cell with this interactive diagram. Students will drag and drop correct parts to label a plant cell. This activity is usually done on printable worksheets but having it online makes it easy to keep practicing without having to discard a lot of paper. Students are asked to reaarange on a diagram the following items: cell wall, cell membrane, nucleus, vacuole, choloroplasts and more. This is a science aptitude test for grade 4 to grade 6.