1Which transcriptional activator turns on genes in haploid a

1.Which transcriptional activator turns on genes in haploid a cells in S. cerevisiae?

Solution

The a specific genes encode proteins that confer the a phenotype are activated by cellular protein called Mcm1.Mcm1 alone turns on a-specific genes.In a cells,Mcm1 binds to the promoters of a -specific genes and activates transcription .