All about Biology Notes

May 20th, 2015
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Biology is the study of life or living organisms. - Importance of Biology- •better understanding on the functions of human body.•better understanding on the causes of diseases and its cure.•better understanding on ecology and hence improve the management of problems related to the environment

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Cell Basic unit of lifeCell wall The rigid structure that surrounds the plasma membrane of plantCentriole Pair of small cylindrical structures made out of a complex arrangement ofmicrotubules, outside the nucleus that form spindle fibres during cell division in animal cells.Chloroplast Any of the chlorophyll containing organelles in which photosynthesis takesplaceGolgi apparatus An organelle within the cytoplasm that process, packages, and distributessecretory products such as enzymes and hormones.Lysosome A membrane-bound sac which contains enzymes responsible for the digestionof substances in food vacuoles.Mitochondrian An organelle in which ATP molecules are produced during aerobic respiration.Nucleus the largest organelle that contains genetic material. The nucleus function asthe control centre of the cell.Organ a distinct part of an organism which consist of different tissues. An organ isspecialised to perform one or a number of functions.Organelle A membrane-bound structure within a cell which carries out particularfunction.Plasma membrane The semi-parmeable outer membrane of cell which regulates the movementof substances in and out of the cell.Ribosome A small spherical organelle within a living cell where proteins are synthesized.Rough endoplasmic A network folded membranes that have ribosomes attached to its surface fortransporting proteins made by the ribosomes.Smooth endoplasmic

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