Which of the following statements concerning the hepatitis B vaccine is FALSE?

A) It must be given in three doses.
B) It is protective against the virus in 95% of vaccinated individuals.
C) It is recommended for high-risk groups.
D) It must be repeated every five years.
E) Immunity can last at least 20 years and may be for life.


D

Biology & Microbiology

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The last protein in a signaling pathway is called the ____

a. target protein b. final acceptor c. electron acceptor d. second messenger e. effector protein

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Which animal has the simplest known central nervous system?

a. a flatworm b. an arthropod c. a chordate d. a mollusk e. an echinoderm

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All of the rickettsias are spread by transovarian transfer

Indicate whether the statement is true or false

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