Acellular Vaccines and Subunit Vaccines

question 24

Multiple Choice

Acellular vaccines and subunit vaccines

• A)contain modified bacterial exotoxin molecules.
• B)contain select antigenic components of a pathogen rather than whole cells or viruses.
• C)utilize DNA strands that will produce the antigen.
• D)confer passive immunity.
• E)are always genetically engineered.

---

Definitions:

Mast Cell

A type of white blood cell part of the immune system, containing granules rich in histamine and heparin, involved in allergic reactions and inflammation.

Histamine

A compound released by cells in response to injury and in allergic and inflammatory reactions, causing contraction of smooth muscle and dilation of capillaries.

Protease Inhibitors

Substances or drugs that inhibit the action of proteases (enzymes that break down proteins), used in various therapies including the treatment of viral infections.

Reverse Transcriptase

An enzyme used by retroviruses to transcribe their RNA into DNA, integrating the viral genome into the host's genome.