You Have Isolated a Strain of Mutant Yeast Cells That

question 62

Multiple Choice

You have isolated a strain of mutant yeast cells that divides normally at 30°C but cannot enter M phase at 37°C.You have isolated its mitotic cyclin and mitotic Cdk and find that both proteins are produced and can form a normal M-Cdk complex at both temperatures.Which of the following temperature-sensitive mutations could NOT be responsible for the behavior of this strain of yeast?

• A)inactivation of a protein kinase that acts on the mitotic Cdk kinase
• B)inactivation of an enzyme that ubiquitylates M cyclin
• C)inactivation of a phosphatase that acts on the mitotic Cdk kinase
• D)a decrease in the levels of a transcriptional regulator required for producing sufficient amounts of M cyclin

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Definitions:

ACP

Accelerated cost recovery system, a method used for calculating depreciation expenses for tax purposes.

Inventory Turnover

A ratio showing how many times a company's inventory is sold and replaced over a specified period, indicating operational efficiency.

Short-Term Financing

The process of obtaining funds to cover immediate needs, typically for a period of less than one year.

Cash Inflow

The money entering a business or project from various sources, such as sales, investments, financing, and operations.