Actin and myosin filaments are both present in the dense region called the

A. H zone.
B. I band.
C. A band.
D. M band.
E. Z line.


Answer: C

Biology & Microbiology

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a. right AV valve. b. right pulmonary valve. c. left AV valve. d. left pulmonary valve. e. aortic valve.

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Because attenuated live vaccines contain viruses that are less virulent, many booster vaccines must be given to produce an effective immune response.

Answer the following statement true (T) or false (F)

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An agar plate for counting colonies and maximizing statistical validity should ideally contain

A) 1 to 100 colonies. B) 50 to 100 colonies. C) 30 to 300 colonies. D) 100 to 1000 colonies.

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