Question

22 multiple choice 15 points which of the following yeast strains is likely to survive on mva medium? a strain with both adenine 1 and adenine 2 mutations a strain with both trp 1 and trp 2 mutations (trp, tryptophan) a strain with trp 1 mutation only a strain with only typ 2 mutation

Explanation:

MVA medium typically lacks tryptophan and adenine. Yeast strains with mutations in genes related to adenine or tryptophan synthesis will not be able to grow on MVA medium unless the mutations are complemented or the necessary nutrients are provided. A strain with mutations in adenine - related genes won't be able to synthesize adenine. Strains with tryptophan - related mutations won't be able to synthesize tryptophan. However, if a strain has only one of the tryptophan - related mutations (trp1 or trp2), it may still be able to synthesize tryptophan through alternative pathways or with some residual activity of the non - mutated gene. So a strain with trp1 mutation only has a better chance of survival compared to strains with double mutations or a mutation in an unrelated (to MVA medium requirements) gene.

Answer:

C. a strain with trp 1 mutation only