Which statement describes a temperate virus?
a. A temperate virus undergoes a lytic cycle.
b. A temperate virus is considered virulent.
c. A temperate virus does not always destroy its host.
d. A temperate virus does not undergo a lysogenic cycle.
e. A temperate virus always destroys their host immediately.
c
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The trait of cream-colored eyes in Drosophila is an example of ________
A. simple recessive alleles B. incomplete penetrance of red eyes C. a gene modifier effect in eye color D. gene dosage E. a spontaneous mutation
Skeletal muscle H zones are composed of ____
a. discs to which thin filaments are anchored b. stacked thick filaments along with the parts of thin filaments that overlap both ends c. thin filaments but no thick filaments d. thick filaments but no thin filaments e. stacked thin filaments along with parts of thick filaments that overlap both ends
Fragile X syndrome is a human disease caused by a trinucleotide repeat expansion that results in loss-of-function of the FMR1 gene on the X chromosome. An animal model with most features of this syndrome could be created by
A) adding a transgene containing a mutant copy of the FMR1 gene to a mouse or primate genome. B) adding a transgene containing a wild-type copy of the FMR1 gene to a mouse or primate genome. C) knocking out both copies of the FMR1 gene from a mouse or primate genome. D) knocking out one copy of the FMR1 gene from a mouse or primate genome.
Recent studies have shown that some Clostridia species have peptidoglycan between an inner and outer membrane, and were therefore properly reclassed as Gram-negative because of their unrelatedness.
Answer the following statement true (T) or false (F)