Logged out
Access All our Essays in an Instant
Swap your work for FREE access, or pay £4.99 for instant access
Genetic Engineering.
Member rating:
(2 votes)
| Words:
| Submitted: Wed Nov 19 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:
TASK THREE Genetic Engineering During cell division the chromatin of the nucleus condenses to form chromosomes. Chromosomes consist of DNA and contain genes. A gene is a portion of DNA that codes for the production of a protein. All genes carried out in the nucleus constitute the genotype. The actual individual that develops the physical appearance is known as the phenotype. There are two related by the equation; Phenotype = genotype + environment DNA In DNA the bases are A,C G and T. DNA consists of two strands of nucleotides joined in the middle. The base A pairs with T and C pairs with G. TRANSRIPTION A special enzyme called RNA polymerase attaches to the DNA molecule at the ''start'' sequence. This causes the strand to unwind. They move along the DNA molecule and nucleotides complementary. The DNA are linked in to form a growing mRNA molecule. At the ''stop'' sequence the enzyme becomes detached and the mRNA molecule passes...
To see the full version of this document, and 145,270 others
