The Structure of RNA Differs from DNA in That

question 10

Multiple Choice

The structure of RNA differs from DNA in that

• A) RNA contains pyrimidines but not purines.
• B) DNA contains pyrimidines but not purines.
• C) DNA contains purines but not pyrimidines.
• D) the backbone of RNA contains ribose.
• E) RNA contains purines but not pyrimidines.

---

Definitions:

Barrel Chest

A chest shape characterized by an increased front-to-back diameter and a rounded appearance, often seen in chronic obstructive pulmonary disease (COPD).

Atelectasis

The collapse of part or all of a lung, preventing the respiratory exchange of carbon dioxide and oxygen.

Percussing

The act of tapping on a surface, often the body in a medical context, to diagnose the condition of the underlying tissue or organ based on the sound produced.

Pneumonia

An infection of the lungs causing inflammation of the air sacs, which may fill with fluid or pus, leading to respiratory symptoms.