Which of these viruses is known to cause a persistent viral infection?

A. Measles virus
B. Herpes simplex virus
C. Varicellovirus
D. Hepatitis A virus


Ans: A. Measles virus

Biology & Microbiology

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Reductive dechlorination is a process in which

A) the number of chlorine atoms present is reduced by oxygenase enzymes. B) chlorinated organics are used as terminal electron acceptors in anaerobic respiration. C) carbon dioxide is the final end product. D) xenobiotics are cometabolized with other reductive reactions.

Biology & Microbiology

Which of the following terms is used to indicate the entire set of RNA molecules that can be made by a cell?

A) transcriptomes B) genomes C) proteomes D) desmosomes E) total RNA

Biology & Microbiology

Amniocentesis involves sampling

a. the fetus directly. b. the fetal cells floating in the amniotic fluid. c. sperm. d. blood cells. e. placental cells.

Biology & Microbiology

What is the role of calcium ions during contraction of a skeletal muscle?

What will be an ideal response?

Biology & Microbiology