A Researcher Working with Mammalian Kidney Cells Grown in Culture

question 80

Multiple Choice

A researcher working with mammalian kidney cells grown in culture observed that cells treated with a proteolytic enzyme (an enzyme that breaks down proteins) lost the ability to respond to the hormone vasopressin but not to the hormone aldosterone.Which is a reasonable explanation for this observation?

• A) The vasopressin receptor is a protein, whereas the aldosterone receptor is composed of either lipids or carbohydrates.
• B) The cells lost the ability to synthesize the vasopressin receptor but retained the ability to synthesize the aldosterone receptor.
• C) The vasopressin receptor is embedded in the cell membrane with an external portion that binds its ligand, whereas the aldosterone receptor is an intracellular receptor.
• D) A debilitating mutation was introduced into the gene encoding the vasopressin receptor, but no such mutation affected the aldosterone receptor gene.
• E) Vasopressin requires a receptor to stimulate a signal transduction pathway, whereas aldosterone can stimulate a signal transduction pathway without binding to a receptor.

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Direct Materials Purchases Budget

A detailed plan estimating the raw materials that must be purchased to fulfill the production budget and to meet inventory requirements.

Plastic

Synthetic or semi-synthetic organic compounds that are malleable and can be molded into solid objects of diverse shapes.

Budgeted Production

The estimated amount of goods or services that a company plans to produce over a specific time frame, according to its budget.

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The process of paying out cash for expenses and purchases as recorded in the cash disbursement journal.