An A260/A280 Ratio of Less Than 1

question 10

Multiple Choice

An A260/A280 ratio of less than 1.8 indicatesـــــــــــــــــــــــــ .

• A)pure DNA
• B)pure RNA
• C)protein contamination of DNA
• D)RNA contamination of DNA

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Definitions:

Trust Endorsement

An endorsement that is used when the instrument is being transferred to an agent or trustee for the benefit of either the endorser or a third party; gives the endorser the rights of a holder.

Agent

An individual authorized to act on behalf of another person or entity in business transactions or legal matters.

Special Endorsement

An endorser’s signature accompanying the name of the endorsee.

Endorser

A person who signs the back of a negotiable instrument, such as a check, thereby transferring ownership or guaranteeing its payment.