Parts of an mRNA molecule that are removed before protein synthesis are called
A) exons.
B) exomes.
C) promoters.
D) introns.
D) introns.
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Insulin is a product of
A. pancreatic ?-cells. B. pancreatic ?-cells. C. pancreatic exocrine cells. D. the kidney. E. the liver.
Nucleic acid techniques have great power as diagnostic tools because they may be
A. very specific. B. quick and easy to perform. C. used to enhance the growth of bacteria. D. used to selectively inhibit the growth of certain bacteria.
Answer the question using the accompanying figure. This figure illustrates the life cycle of a ____
a. brown algae b. green algae c. water mold d. plasmodial slime mold e. cellular slime mold
Which of the following characterize B cells?
A. They are manufactured and mature in the bone marrow. B. They function in antibody mediated immunity against bacteria. C. They directly recognize antigens and undergo clonal selection. D. All of the choices characterize B cells. E. None of the choices characterize B cells.