P5 Cells Q&A

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What are the differences between the animal cell and the plant cells?
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The bag allowed the iodine solution to pass through it to enter the bag. Thus, the iodine solution turned dark blue when it came in contact with the starch solution. The bag did not allow the starch solution to pass through it to enter the container. Thus, the iodine solution did not come in contact with any starch, so it remained brown.
Does cell membrane allows bigger molecules to pass through?No. It does not allow bigger molecules to move into the cell or other cell structures to move out of the cell.What is cytoplasm?Cytoplasm is a jelly-like substance mainly made up of water. Many chemical reactions take place here & new substances are made. It contains many other cell structures. Many small vacuoles which contain air, food & liquid particles can also be found in the cytoplasm.What is nucleus?Nucleus is the "Brain" of a cell. It controls all the activities in the cell. It contains chromosomes which contain genes which are made up of DNA.What is cell wall?Cell wall is made up of stiff material called cellulose. It surrounds the cell membrane & gives the cell a regular shape. The rigid structure of the cell wall prevents the cell from bursting when the plant takes in water.What is chloroplasts?Chloroplasts are disc-like structures that are needed for photosynthesis. They contain green-pigment, chlorophyll which traps light energy needed for photosynthesis.Large vacuole in the plant contains cell sap. State the function of cell sap.Cell sap contains water & dissolved substances like sugar & salt. The cell sap keeps cell firm by taking in water.Why cells are important to living things?It is important for cells to reproduce so that organisms can grow, and for old & damaged cells to be replaced.