BIOL1020 Lecture Notes - Lecture 5: Neurospora Crassa, Dna Polymerase, Histone H2B
Document Summary
Beadle and tatum experiment (1941: the bread mould neurospora crassa is an autotroph, they bombarded it with x-rays, known to cause mutations, and looked among the. One-gene-one- protein hypothesis one-gene-one- polypeptide hypothesis responsible for the physical nature of traits. Molecular anatomy of a gene: a gene, the heritable instruction for a trait, is a segment of the. Dna: genes are found in the dna, but. 1. 65 wraps of dna molecule around it: each of the histone molecules can protrude onto the surface of the chromatin/dna and be chemically modified, which plays an important role in transcriptional activity of the. Individual bacteria respond to environmental change by regulating their gene expression: e. coli is a type of bacterium that lives in the human colon. It can: compete for nutrient with other bacteria, survive in many different environments, tune its metabolism to changes in the environment and different food sources.
