During splicing, which molecular component of the spliceosome catalyzes the excision reaction?
A.sugar
B. DNA
C. protein
D. lipid
E. RNA
Ans: E. RNA
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Changes in an organism that are the result of changes in gene action(s) are known as
A) diseases. B) epigenetic. C) silencing. D) micro-RNA mediated. E) all of the above
Bush beans grow as small bushes rather than as vines because their internodes are short and they branch close to the apical meristem. Which substance, if applied to a bush bean, might cause it to elongate its internodes and grow as a vine?
A) a cytokinin B) a gibberellin C) abscisic acid (ABA) D) ethylene
Botulinum antitoxin produced in a horse and given to a human suffering from botulism food poisoning is an example of
A. naturally acquired passive immunity. B. naturally acquired active immunity. C. artificially acquired passive immunity. D. artificially acquired active immunity.
Vitamin ____ is water soluble
a. A b. C c. D d. E e. K