Efficiently translated mRNAs tend to be stable in the cytoplasm; those that are poorly translated tend tobe rapidly degraded. Which of the following is not a step in the pathway for mRNA degradation?
A. targeting of upstream ORFs for nuclease binding
B. removal of the poly(A) tail
C. removal of the 5' 7-meG cap
D. binding of mRNA by 5'-3' and 3'-5' RNA exonucleases
A
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Which addition to a DNA sequence would not cause a frameshift mutation?
A) T B) GC C) GCT D) GGCT
The elements that make up the bulk of the Human body are
A) Carbon, Water and Nitrogen B) Carbon, Hydrogen, Oxygen and Nitrogen, C) Carbon, Helium, Oxygen, Nitrogen and D) Carbon, Oxygen, Nitrogen and Iron
The attenuated oral poliovirus vaccine (OVP) is no longer administered in the U.S.A. because it
A) is very toxic. B) does not provide good immunity. C) can revert to wild-type virulence. D) can be spread to contacts. E) can be spread to contacts and can revert to wild-type virulence.
A capnophile is a microorganism that thrives in conditions of high
A) carbon dioxide levels. B) hydrostatic pressure. C) oxygen levels. D) pH. E) salt concentration.