Nucleus - Nucleus The nuclei can be seen in the photograph...

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Nucleus The nuclei can be seen in the photograph of human cheek cells below. The nucleus contains DNA . Recall that DNA contains instructions needed to produce proteins that control metabolism and other cell functions. One nucleus can serve a limited amount of cytoplasm , so large cells are often multinucleate , that is, they contain more than one nucleus. Teased skeletal muscle X 200 Note the many nuclei visible in the cell on the left. Chromatin is the grainy threadlike DNA. During cell division, the nuclear membrane disintegrates and the DNA becomes coiled producing visible structures called chromosomes . The material within the nucleus is referred to as the nucleoplasm . A double membrane ( nuclear envelope ) surrounds the nucleus. Nuclear pores allow materials to pass into and out of the nucleus. Cytoplasm Cytoplasm is the material enclosed by the plasma membrane, excluding the nucleus.
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Ribosomes Ribosomes read the code in mRNA and synthesize protein accordingly. The symbols to the left are used in the drawings of
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This note was uploaded on 01/04/2012 for the course BSC BSC1005 taught by Professor Orlando,rebecca during the Fall '10 term at Broward College.

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Nucleus - Nucleus The nuclei can be seen in the photograph...

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