DNA proofreading can be done by the enzyme
A) Helicase
B) DNA polymerase
C) DNA ligase
D) RNA polymerase
Ans: B) DNA polymerase
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The only class of antibody that can cross the placenta is
A. IgA. B. IgD. C. IgG. D. IgE.
What is the function of the poly A tail?
A. The poly A tail is required for the termination of translation, it is recognized by the release factor proteins B. The poly A tail is required for the mRNA to resume its double helical structure C. The poly A tail increases mRNA stability in eukaryotes. D. The poly A tail increases mRNA stability in prokaryotes. E. The poly A tail serves as a termination sequence for RNA polymerase III.
Sediments that are formed from seawater as a result of a variety of chemical processes are called:
a. cosmogenous. b. hydrogenous. c. organic.. d. biogenous. e. terrigenous.
Which endocrine gland, A, B, C, D, or E, is the adrenal gland?
1.A
2.B
3.C
4.D
5.E