A mutant protein has been designated as G189A. What does this designation reveal about the mutation?
A. That a G nucleotide has been exchanged for an A nucleotide 189 bases from the 5' end of the coding region.
B. That a glycine in position 189 of the protein is now an alanine.
C. That an A nucleotide has been exchanged for a G nucleotide 189 bases from the 5' end of the coding region.
D. That a glycine is now in position 189 of the protein instead of an alanine.
E. That a nonsense mutation occurred at position 189 of the protein.
B
You might also like to view...
Many eukaryotes have a DNA glycosylase that specifically removes T residues from DNA when paired with G. Why is it better to repair the G-T pairing to G-C by removing the T than to remove the G and form an A-T pair?
A. G-C pairs can form three hydrogen bonds between them and are therefore stronger. B. Oxidative damage to guanine by alkylation is the most common reason for G-T pairs, so removal of the T will maintain the original G-C pair. C. T bases easily tautomerize into C bases, so removing the T will make sure the pair stays in its original form. D. G-C basepairs occur more frequently in cells. E. All of the choices provided are potential reasons.
DNA microassays:
A. can reveal protein-protein interactions. B. demonstrate differential expression of genes. C. can reveal protein-RNA interactions. D. can be used to purify proteins that bind to epitope tags. E. are somewhat large and unwieldy but give a great deal of information.
Lister developed his ideas on prevention of infection during medical procedures after studying the work of
A. Koch. B. Pasteur. C. Jenner. D. Fleming.
Which of the following infects only plants?
A. Virus B. Prion C. Viroid D. Capsid