Saturday, August 29, 2009

Parts of a plant cell (click on the image to zoom in)




Organelles in a Plant Cell:


* Cell membrane: controls what goes into (nutrients) and out (wastes) of the cell
* Cell wall: supports and protects the cell
* Nuclear membrane: barrier between the nucleus and the cytoplasm
* Plasmodesma: channels between cell walls for transport and cell-cell communication
* Vacuole: stores water, food and wastes
* Plastids: manufacture / storage of important chemical compounds
* Chloroplast: green plastid, contains chlorophyll needed in photosynthesis
* Leucoplast: another plastid, bulk storage of starch, lipid or protein
* Chromoplast: plastids responsible for pigment synthesis and storage
* Golgi Complex: process and package proteins and lipids, for transport and secretion.
* Ribosome: manufacture proteins (assembly of amino acids into polypeptide chains)
* Endoplasmic reticulum:intercellular network, transport of proteins inside / out of cell
* Mitochondrion: "cellular power plants", generate cell's supply of ATP
* Lysosome: contains digestive enzymes to breakdown food particles, or engulfed bacteria.
* Cytoplasm:jelly-like substance, site where most cellular activities (reactions) occur
* Nucleus: "control center", membrane-enclosed organelle, contains DNA molecules
* DNA: Deoxyribonucleic acid (DNA) contains the long-term genetic instructions
* Chromatin: complex combination of DNA, RNA and protein that makes up chromosomes
* RNA: RNA is transcribed from DNA to create the instructions (mRNA) for proteins
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