Biology Definitions

carrellulose A straight chain polymer of glucose molecules secreted by gives and Used as structural supporting material. Cell wall A comparatively rigid structure composed of cellulose that encloses the Cells of appoints. The cell wall gives these cells their context and limits their Expansion in hypotonic media. Chloroplasts A group of structures that has the unsectarian name plastid. Plastids Are membrane-bound organelles found only in plant cells. Usually plastids argon Spherical bodies that float freely in the cytoplasm, holding rouge molecules or starch. Chloroplasts contain the green pigment chlorophyl, a substance that gives plants the green color. Chlorophyll is a special(a) molecule that has the ability to trap light and to convert it to a form of energy that plants can use in carrying line up out of the closet the chemical steps of the food-making process cognize as Photosynthesis. A double membrane surrounds each chloroplast. inner(a) the Chloroplast is n umerous flatten membranous sacs called thylakoids (formerly called grana). The thylakoids ar the structures that contain the chlorophyll and it is within these sacs that photosynthesis takes place. Endoplasmic second stomach Spreading throughout the cytoplasm, extending from the Cell membrane to the membranes of the nucleus is a network of membranes that Form channels, tubes, and planate sacs; this network is named the endoplasmic second stomach. One single-valued function of the endoplasmic reticulum is the impetus of materials throughout the cytoplasm and to the plasma membrane.

The endoplasmic reticulum has o ther primary(prenominal) functions related ! to the synthesis of materials and their packaging and diffusion to sites needed. Metabolism An comprehensive term concerning all of the biochemical activities carried on by cells, tissues, organs, and systems infallible for the sustaining of life. Metabolic activities in which self-aggrandizing molecules are built from littler ones or in which nutrients are changed into living substance are called anabolic activities, or anabolism. Destructive metabolism in which large molecules are degraded for energy or changed into their smaller structure blocks is called catabolic activity, or catabolism. ATP (Adenosine triphosphate) The... If you want to hold a full essay, order it on our website: BestEssayCheap.com

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