RNAi methodology uses double-stranded pieces of RNA to trigger breakdown of a specific mRNA or inhibit its translation. For which of the following might this technique be useful?
A) to decrease the production from a harmful mutated gene
B) to destroy an unwanted allele in a homozygous individual
C) to form a knockout organism that will not pass the deleted sequence to its progeny
D) to raise the concentration of a desired protein
A
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The function(s) of DNA polymerase includes which of the following?
A. DNA synthesis. B. DNA proofreading. C. removal of RNA primers and filling in the gaps. D. DNA synthesis and proofreading. E. DNA synthesis, DNA proofreading, and removal of RNA primers and filling in the gaps.
When the SRY gene of the Y chromosome becomes active (around 7 weeks), the ____
a. Müllerian and Wolffian ducts both develop into male reproductive structures b. Müllerian ducts develop into male reproductive structures and the Wolffian ducts disappear c. Müllerian ducts disappear and the Wolffian ducts develop into male reproductive structures d. Müllerian and Wolffian ducts both disappear e. Müllerian and Wolffian ducts both develop into female reproductive structures
African black-bellied seedcracker finches have beaks that are either large or small. Only large-beaked birds can crack open hard seeds, and small-beaked birds are more adept at handling small seeds. Both have an advantage over intermediate-sized beaks
This is an example of a response to: A) disruptive selection. B) sexual selection. C) directional selection. D) stabilizing selection.
Discuss the problems with development of antifungal, antiprotozoan, antihelminth, and antiviral drugs compared to the antibacterial drugs. Discuss at least 3 different modes of action that have been developed for these drugs.
What will be an ideal response?