Select ALL that apply to describe regulation of GAL structural gene expression:
ID: 132261 • Letter: S
Question
Select ALL that apply to describe regulation of GAL structural gene expression: A. Gal4 recruits the transcriptional machinery to transcribe GAL genes B. Gal80 and Gal4 form a switch whose default state is to turn GAL structural genes "on" OC.When galactose is not present, Gal80 inhibits Gal4 D. In the presence of galactose, Gal80 inhibits Gal4 OE In the presence of galactose, Ga13 releases the repression of GAL structural genes F Gal4 has two functional domains: a DNA-binding domain, and a domain that influences chromatin condensationExplanation / Answer
Please find the answers below:
Answer 1: Choices A, B, D, F (galactose operon is strictly followed in eukaryotes such as yeast for metabolism of sugar galactose. Unlike other bacterial operons, this operon is governed under the structural complexity od chromatin where Gal80 negatively regulates Gal4)
Answer 2: Choices B, C, D (The figure shows a non-complementary pairing of the DNA and a result of crossing over in the offspring for same locus in the parents. However, since no symmetry is found in the parents and offspring, the letter T seems to be a point mutation)