Dna and Digestive Enzymes

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Explain how instruction on DNA results in the export of a digestive enzyme from an intestinal cell |September 292014| Explain how instruction on DNA results in the export of a digestive enzyme from an intestinal cell. The best way for one to understand how the above process would take place, is to begin at the nucleus which is" the control center of the cell"(Mader,2005,p.35). The structure of the nucleus is such that it is surrounded by two membranes the outer one having nuclear pores through which information entry and exit from the cell is controlled. All genetic information and messages are stored in the nucleus mainly the DNA. The main genetic information or( DNA) "deoxyribonucleic acid"(Watson,1995,p.25.)It never actually leaves the nucleus but allows parts of its information to be replicated and transcribed into smaller units which then pass through the nucleus pores into the cytoplasm. Ribosomal ribonucleic acid (rRNA) goes to form the ribosomes which have two sub units and look almost like a snow man. "Each subunit has its own mix of proteins and rRNA".(Madder,2005.p.39). A ribosome can also be known as the chemical factory. Messenger ribonucleic acid (mRNA) has the job of making copies of parts of the DNA as required by the body and taking it through the chemical factory. So in relation to the topic of this essay, a messenger mRNA comes along and takes a copy of a digestive enzyme from the DNA and squeezes through the pores with it into the cytoplasm . In this environment it heads towards the ribosomes and passes through the ribosome where protein synthesis and translation occurs. The protein then passes to the Golgi apparatus where it is processed and packaged or more simply modified and labelled for its digestive function then released in vesicles to go and perform its specific function. Bibliography/Reference List

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