Genes are composed of DNA sequences and are condensed into larger structures called:
a. DNA.
b. proteins.
c. chromosomes.
d. lipids.
e. cell membranes.
C
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Draw a graph of relative fitness and number of mutations of an evolving strain versus the ancestral strain over 20,000 generations under the same growth conditions
Explain the change in fitness and mutations over time using evolutionary concepts and terms. What will be an ideal response?
Which of the following is necessary for DNA to make copies of itself?
A. Ribosomes must be present. B. The cell must have an abundant supply of RNA nucleotides. C. The two strands of the DNA molecule must separate. D. Chromosomes must be synapsed.
How does specialized transduction differ from regular lysogeny?
a. The resulting bacteriophage from specialized transduction cannot infect a new host cell. b. The resulting bacteriophage from specialized transduction does not contain any viral DNA. c. The prophage is not excised during specialized transduction. d. The prophage in specialized transduction carries with it pieces of the host chromosomal DNA.
Otitis media may lead to dangerous meningitis in children due to infection with
A) Streptococcus agalactiae. B) Streptococcus pneumoniae. C) Streptococcus mutans. D) Enterococcus. E) Mycoplasma pneumoniae.