After Exposing a DNA Extract to Phenol or a Mixture

question 16

Multiple Choice

After exposing a DNA extract to phenol or a mixture of phenol and chloroform and centrifuging the solution,where are the proteins located?

• A)in the upper aqueous phase
• B)in the lower phenol phase
• C)in the upper phenol phase
• D)in the lower aqueous phase
• E)precipitated at the boundary between the aqueous and phenol phases

---

Definitions:

Redeemable Bonds

Bonds that can be returned to the issuing entity before maturity for a predetermined price.

Retirement

The act of withdrawing from one's position or occupation, or the period of life after ending one's career, often implying financial self-sufficiency.

Stated Dollar Amount

A specified amount of money expressed in dollars, often referring to the face value of financial instruments or the nominal amount in transactions.

Credit Ratings

Assessments of the creditworthiness of borrowers, ranging from governments to private enterprises, indicating their ability to repay borrowed money.