To Study the Function of the Essential Cytosolic Hsc70 Genes

question 44

Multiple Choice

To study the function of the essential cytosolic Hsc70 genes in yeast,researchers constructed a shuttle vector in which a copy of the Hsc70 gene was ligated to the GAL1 promoter.The vector was then introduced into haploid yeast cells in which all four copies of the Hsc70 genes had been disrupted.Following introduction of the vector,you would expect that

• A)the yeast cells would grow on both glucose and galactose media.
• B)the yeast cells would grow on glucose but not galactose medium.
• C)the yeast cells would grow on galactose but not glucose medium.
• D)on transfer to either glucose or galactose medium,the vector-carrying cells would eventually stop growing because of insufficient Hsc70 activity.

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Definitions:

Muscle Cells

Specialized cells designed to contract and cause movement; can be classified as skeletal, cardiac, or smooth muscle cells.

Muscle Fibers

Individual cells of muscles that are long, cylindrical, and capable of contraction to facilitate body movements.

Spindle-Shaped Cells

Cells that taper at both ends and are found in smooth muscle tissues and some types of soft tissue.

Skeletal Muscle

A type of striated muscle tissue that is voluntarily controlled, responsible for movement of the skeleton.