A New Mutation in Saccharomyces Cerevisiae, a Eukaryotic Yeast, Causes

question 5

Short Answer

A new mutation in Saccharomyces cerevisiae, a eukaryotic yeast, causes the cells to be unable to produce the amino acid histidine. Specifically, they cannot catalyze the first reaction in the histidine biosynthesis pathway. When examined closely, they are producing a completely wild-type enzyme for this reaction but at greatly reduced levels. Explain the mutation.

---

Definitions:

Negative Reinforcer

A stimulus whose removal or avoidance following a behavior increases the likelihood of that behavior being repeated in the future.

Stockbroker

A financial professional who buys and sells stocks and other securities for clients, typically in exchange for a fee or commission.

Reduces Stress

The effect of lowering psychological or physiological strain or tension typically through various strategies or interventions.

Negative Reinforcer

A stimulus whose removal following a behavior increases the likelihood of that behavior being repeated.