How Might a Researcher Study the Presence of a Specific

question 36

Multiple Choice

How might a researcher study the presence of a specific protein in cells from different tissues of the body?

• A) Slice cells into thin sections, use electron microscopy to take many images of structures inside the cells, and search for the protein in the images.
• B) Observe the protein in living cells, using light microscopy techniques that preserve cells in the living state.
• C) Treat cells with a dye that selectively binds to the protein of interest, and look for evidence of this dye in cells, using light microscopy.
• D) Use scanning electron microscopy to search for the protein in the three-dimensional surfaces of whole cells.
• E) Use a general protein stain to treat cells before preparing them for bright-field microscopy, and then search for evidence of this dye in the samples.

---

Definitions:

Statement Of Cash Flows

A financial statement that shows how changes in balance sheet accounts and income affect cash and cash equivalents, breaking the analysis down into operating, investing, and financing activities.

Times-Interest-Earned Ratio

A metric used to evaluate a company's ability to meet its interest obligations, calculated as earnings before interest and taxes (EBIT) divided by interest expense.

EBIT

Earnings Before Interest and Taxes, a metric used to assess a company's financial performance, focusing purely on operational and production efficiency.

Net Profit

The amount of profit left over after all expenses and taxes have been subtracted from total revenue.