Consider the genes that encode the light chain of antibody molecules in a particular mammal. There are five V regions, three J regions, and one C region. How many different light chain sequences could be formed based on combinatorial joining?
A. 9
B. 2
C. 15
D. 8
Answer: C
Biology & Microbiology
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Psilotum lacks
a. roots. b. a mechanism to take up water and minerals. c. vascular tissue. d. alternation of generations.
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The use of any chemical in the treatment, relief, or prophylaxis of a disease is called ________.
A. selective toxicity B. prophylaxis C. chemotherapy D. nephrotoxicity E. synergism
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Which enzyme adds new nucleotides to the end of a growing strand?
A. helicase B. polymerase C. gyrase D. ligase E. endonuclease
Biology & Microbiology