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cells and cell processes
Descripción
Mapa Mental sobre cells and cell processes, creado por jamie long el 09/04/2013.
Mapa Mental por
jamie long
, actualizado hace más de 1 año
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jamie long
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Resumen del Recurso
cells and cell processes
vacuole- space filled with liquid cell starch
cell wall- made of cellulose, surrounds and supports cell
chloroplast- absorbs light energy to produce glucose by photosynthesis
protista- single celled algae that have features similar to both plant and animal cells.
e.g euglena, has no cell wall but chloroplast, has an eyespot to detect light, flagellum to move and contractile vacuole to remove water from cell
bacteria, fungi, viruses and unicellular algae are all organisms which are microbes
what features are common to all cells?
cytoplasm- jelly material that is the site of chemical reaction
nucleus- contains DNA, the cemical that controls the cells activities.
cell membrane- controls the entry of materials into and out of the cell
what are the feautures of yeast?
single celled organism
asexual reproduction
reproduced by budding
virus: smaller than bacteria, reproduces inside host cells, new viruses are assembled inside host cells.
new viruses attack new host cells
bacteria are single celled organisms, they reproduce by binary fission(dividing in 2) and they are thought to be the earliest form of life
specialized cells are cells who's shape had been adapted to suit the function of the cell.
specialisation occurs when the organism becomes multicellular (made of lots of cells)
proteins are made from a chain of amino acids linked togethor to form a specific shape.
they have a number of functions e.g enzymes hormones and muscles.
enzymes are biological catalysts that speed up the rate of reaction without becoming a product of itslef, they are made of protein
they control chemical reactions of cells
stem cells are cells that are able to differentiate into other cells .
they are found in; embryos, bone marrow and meristems of plants
2 types of cell division
mitosis- the production of new body cells
meiosis- the production of gametes
denaturing is when the enzymes active site has changed shape and is no longer able to catalyse a reaction
changing pH denatures the enzyme
boiling denatures the enzyme
function of DNA
the order of the bases from a code , every three letters codes for an amino acid (triplet code)
the order of the bases dictates the order of the amino acids and this creates protein e.g an enzyme or an hormone
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