organelles

Created by: Anniewest123
Created on: 02-10-17 20:49

nucleus

contains the DNA in chromosomes and therefore the information to regulate the metabolism and reproduction of the cell. the nucleur membrane provides a selective barrier between substances in the nucleus ad cytoplasm. the nuclear pores control the mov

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cell wall

plants. thick cellulose wall surrounds the cell membrane giving strength and ridgity to the cell. wall does not control the movement of substances into and out of the cell. because the cell wall is rigid, plant cells tend to regular shape

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golgi apparatus

site of production of cellular secretions - the packaging department of the cell (sometimes clled dictysomes in plants). found associated with smooth endoplasmic reticulum.

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centrioles

form poles and spindles (extension of the microtubules0 for cell division, movig the chromosomes apart during mitosis and meiosis. capable of self replication. not found in the cells of highter plants

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lysosomes

the principle digestive organelles of the cell. they produce digestive enzymes which aid in dispoible of intracelluar bacteria and other foreign bodies, as well as unwanted organelles. they may cause destruction of the cell if ruptured

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mitochondria

powerhouses of the cell responsible for energy production. cells with a large energy requirement havea greater number. contains there own DNA.

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Cholorplasts

found only in plants, plaslids are structures for storage of starch, pigments and other celluar products. photosynthesis occurs on chloroplasts - a type of plastid that contains chrophyll. contains its own DNA which replicates independently.

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ribosomes

sites of protein syntheisis. consists of two parts - a larger piece and a smaller piece. both are made of a complex of ribosomes RNA and protein

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nucleolus

is made up of multiple copies of the ribosomal RNA genes. it is the site of transcription of these genes and the assembly of ribosomes.

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endoplasmic reticulum

greatly exapanded surface area for biochemical reactions which normally occur at or across membrane surfaces. er may be without ribosomes attached(smooth) or may have them scattered across (rough)

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cell wall

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site of production of cellular secretions - the packaging department of the cell (sometimes clled dictysomes in plants). found associated with smooth endoplasmic reticulum.

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organelles