Which of the following correctly describes papilloma virus (HPV) effects on cell growth?
A. Viral E7 degrades cellular p53
B. Causes insertional inactivation of critical genes
C. Viral E6 perturbs the normal function of cellular Rb
D. Viral E6 stimulates degradation of cellular p53
Ans: D. Viral E6 stimulates degradation of cellular p53
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Eukaryotic mRNA molecules may contain non-coding sequences that must be removed before translation. These are called
A. anticodons. B. introns. C. exons. D. nucleosomes. E. noncodons.
The epithelial lining of the small intestine is modified for what function?
A. protection B. absorption C. secretion D. removing debris E. excretion
It has often been said that the next dominant animals on land, after a hypothetical demise of all mammals, would be insects. Why so?
What will be an ideal response?
Amniocentesis is a procedure that is normally used
A. to change the sex of the fetus. B. to reduce the risk of genetic disease. C. for diagnosis of genetic disorders. D. for nourishing the fetus. E. for gene therapy.