Because Viruses Could Not Be Visualized Using Conventional Microscopes Further

question 13

Multiple Choice

Because viruses could not be visualized using conventional microscopes further progress required the development of techniques for isolating,propagating and analyzing viruses.All of the following are true except:

• A)crystal structure of the tobacco mosaic virus showed that it was made up of RNA and protein
• B)viruses were first observed with an electron microscope
• C)viral DNA has a different structure from that discovered by Watson and Crick
• D)Hershey and Chase demonstrated that the genetic material of some viruses is DNA

---

Definitions:

Return on Assets

A financial ratio that measures the profitability of a company in relation to its total assets.

Net Income

The profit remaining after all expenses, taxes, and costs have been deducted from total revenue.

Assets

Resources owned or controlled by a business or individual that have expected future economic benefit.

Equity

The value of an owner's interest in a company, calculated as the difference between the assets and liabilities on a company's balance sheet.