A Researcher Is Evaluating the Role of a Growth Factor

question 39

Multiple Choice

A researcher is evaluating the role of a growth factor during embryonic development. She notices that this factor functions in both neural development and limb development. How is that possible?

• A)The effects of the growth factor may be concentration-dependent.
• B)The effects of the growth factor may be dependent on location.
• C)The growth factor may result in the transcription of different genes, depending on cell type.
• D)The growth factor may be signaling through different transduction pathways.
• E)All of these choices are possible explanations for the observations.

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Definitions:

Interest

The amount paid for the use of borrowed money, usually expressed as a percentage of the principal.

Investment

The action of allocating resources, usually money, with the expectation of generating an income or profit.

Quarter

One fourth of a given quantity, often referring to a quarter of a year or a quarter of an hour (15 minutes).

Percent Decrease

A measure of how much a quantity has decreased in percentage terms compared to its previous value.