BIOL 367 Chapter Notes - Chapter 3: Peptide Bond, Gene Expression, Valine
Document Summary
Biol 367 chapter 3 an introduction to gene function. 1st step = transcription making rna that is complementary to the dna. 2nd step = translation, the information in the rna is used to make a polypeptide. Amino acids join together via peptide bonds. Li(cid:374)ea(cid:396) o(cid:396)de(cid:396) of a(cid:373)i(cid:374)o a(cid:272)ids = p(cid:396)otei(cid:374)"s p(cid:396)i(cid:373)a(cid:396)y structure. Secondary structure = alpha helix, beta-pleated sheets, Tertiary structure = 3d shap of the polypeptide. Quartenary structure = the way two or more individual polypeptides fit together in a complex protein. The principal covalent bonds within and between polypeptides are disulfide bonds. The non-covalent bonds are hydrophobic and hydrogen bonds. Each enzyme in a biochemical pathwy is controlled by one gene. Crick proposed that rna is the intermediate carrier of gentic information. He vased his hypothesis on the fact that the dna resides in the nucleus of eukaryotic cells, whereas proteins are made in the cytoplasm.
