The process that uses short, synthetic, double-stranded RNAs to intentionally bind mRNAs thereby diminishing gene expression is called ________.
A) CRISPR technology
B) recombination
C) molecular pharming
D) antisense technology
E)
bioremediation
D) antisense technology
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If goats are crossed with sheep, embryos will form but cease development and spontaneously abort. This is an example of
A. a prezygotic mechanism. B. hybrid inviability. C. hybrid sterility. D. hybrid breakdown. E. spermatic behavior.
In an Hfr X F- conjugation, ____
a. the Hfr cell can lose chromosomal genes that it transfers to the F- cell b. the donor cell can become a partial diploid
c. plasmid DNA is transferred from the Hfr cell to the F- cell d. chromosomal DNA can be transferred from the F- cell to the Hfr cell e. chromosomal DNA can be transferred from the Hfr cell to the F- cell
Four of the five choices listed below are parts of a
leaf. Select the exception. a. stoma b. cuticle c. mesophyll d. node e. petiole
What feature of cardiac muscle helps the cells coordinate their contraction as a single unit?
A. large numbers of motor neurons B. covalent bonds between actin and myosin molecules C. intercalated disks rich in gap junctions D. fused cells with multiple nuclei