Logged out
Access All our Essays in an Instant
Swap your work for FREE access, or pay £4.99 for instant access
Discuss the implications of changes in DNA nucleotide sequence for cell structure and function in Sickle Cell Anemia and Phenylketonuria.
Member rating: No Rating | Words: | Submitted: Fri Aug 15 2003
Page Preview
On the left is an image preview of every page of this document, and below are the first 150 words with formatting removed:
Sumaya Desai (Lower Science IV) Biology Homework Assignment Essay Question: Discuss the implications of changes in DNA nucleotide sequence for cell structure and function in Sickle Cell Anemia and Phenylketonuria. Answer: The Deoxyribonucleic acid molecule, which composes the genes of a species, is made up of a long sequence of nucleotides. These nucleotides, taken in a series of three at a time, specify each amino acid subunit on a protein, and consequently the structure of that protein, since the DNA is used to create these in transcription, by using an intermediary mRNA molecule. Changing the sequence of these nucleotide bases in the DNA chain therefore causes a complementary change in the mRNA molecule and the resulting codon and thus the sequence of amino acids in the proteins created in protein synthesis. Such a change in the base sequence of the DNA is known as a genetic mutation. Some genetic mutations are neutral...
To see the full version of this document, and 145,348 others
