A "mini-gene" has the base sequence TACCCGTGCACG. Which of the following sequences represents a single base substitution?
A) TACCCGGCACG
B) TACCCGTGCACG
C) TACCCGAGCACG
D) TACCGTGCTACG
E) TACCCGTGTCACG
C
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teratogens during weeks __________ of development. a. 3–16 b. 4–6 c. 4–8 d. 6–8 e. 7–18
Oral infections with herpes simplex virus 1 can lie dormant in nerve cells for years, and when a patient becomes stressed, the virus is released, forming cold sores on the lips. While lying dormant the virus is in which of the following states?
a. Lysogenic b. Symptomatic c. Latent d. Replicative e. Infective
Signaling molecules in animals are
a. neurotransmitters. b. hormones. c. pheromones. d. local signaling molecules. e. all of these.
In ____, pieces separate from the body of a parent and develop into new individuals
a. fission b. fertilization c. fragmentation d. budding e. parthenogenesis