How many times does a minus-strand RNA virus have to replicate its genome to produce a copy ready for assembly into a new virion?
A. Once
B. Three separate times
C. Twice
D. It first requires reverse transcription
Answer: C
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The affected children in the family above are much more prone to cancer than their unaffected siblings. Which of the following could be true of the affected children?
What will be an ideal response?
When chromosomes fail to segregate properly, it can result in:
A. sister chromatids that are no longer identical. B. gene conversion. C. aneuploidy. D. mating type conversion. E. recombination.
Abiotic components of an ecosystem include
A. only animal life. B. both living and nonliving components. C. living components only. D. nonliving components only. E. all components except animal life.
All of the following are essential amino acids except
a. alanine. b. lysine. c. methionine. d. threonine.