In Yeast, There Are Three Gene Products Required to Synthesize

question 54

Multiple Choice

In yeast, there are three gene products required to synthesize the amino acid lysine. You cross two haploid lysine auxotrophs to form a diploid. The diploid fails to grow on plates lacking lysine. Which of the following can you conclude?

• A)The haploid strains have mutations in the same gene.
• B)The haploid strains have mutations in different genes.
• C)The haploid strains form a complementation group.
• D)The haploid strains do not complement each other.
• E)Both (A)and (D)are true.

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Definitions:

Direct Materials Quantity Variance

The difference between the actual quantity of materials used in production and the expected quantity, multiplied by the standard cost per unit.

Price Variance

The difference between the expected price and the actual price paid for an item.

Factory Overhead Volume Variance

The difference between the budgeted and actual overhead costs due to variations in the volume of production.

Direct Labor Rate Variance

The difference between the actual cost of direct labor and the expected (or standard) cost, based on the hours actually worked.