In mammals and other animals, the expression of a specific gene can be turned off by the introduction of
a. long dsDNA.
b. short dsRNA.
c. short dsDNA.
d. short ssDNA.
e. long dsDNA.
Ans: b
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Peristalsis is the _____
A) movement of the muscular layer surrounding the alimentary canal that is under voluntary control B) rhythmic waves of contraction of the muscular layer surrounding the alimentary canal that are responsible for moving contents of the lumen along the length of the digestive tract C) movement of nerve impulses from the central nervous system to the autorhythmic smooth muscle cells D) rhythmic lengthening and shortening of epithelial cells lining the lumen of the alimentary canal
________ are organisms that are unable to regulate their body temperature.
Fill in the blank(s) with the appropriate word(s).
These organelles make lipids
a. ribosomes b. smooth endoplasmic reticula c. Golgi bodies d. lysosomes e. mitochondria
From what is the lipid-containing outer envelope surrounding the viral capsid of many animal viruses derived?
A) the outer membrane of the chloroplast B) the outer mitochondrial membrane C) the nuclear envelope D) the plasma membrane E) the lysosomal membrane