All of the Following Are Reasons Why an HIV Vaccine

question 16

Multiple Choice

All of the following are reasons why an HIV vaccine has not been developed EXCEPT

• A) there is no known animal model of natural immunity for HIV infection.
• B) vaccines are not effective against viral infections.
• C) small, inexpensive animals which could be used for HIV vaccine research are not available.
• D) HIV has a high mutation rate so one vaccination would not be effective to treat the world-wide pandemic.
• E) use of a weakened virus would potentially transmit the infection.

---

Definitions:

Hydrogen Bonds

Weak bonds formed between a hydrogen atom in one molecule and a more electronegative atom, important in determining the structure of water and biomolecules.

Deoxyribose Sugar

A five-carbon sugar molecule that is a component of DNA molecules, lacking an oxygen atom compared to ribose.

Phosphoric Acid

A weak acid with the chemical formula H3PO4, widely used in detergents, fertilizers, and food processing.

Thymine

A pyrimidine nucleobase found in DNA, pairing with adenine, crucial for DNA stability and integrity.