When performing automated DNA sequencing, all four sequencing reactions can be analyzed together in the capillary gel because:
A. each ddNTP has a different fluorescent tag.
B. each dNTP absorbs light at a different wavelength.
C. each primer is labeled with a different radioisotope.
D. the four reactions are carried out separately and then run together in the capillary gel.
E. each dNTP is labeled with a different fluorescent tag.
Which site on the ribosome is never occupied by a tRNA linked to a nascent polypeptide chain?
A. the A site
B. the P site
C. the E site
Which of the following is the most common type of hydrolysis damage in the cell?
A. deamination of thymidine
B. breakage of the glycosidic linkage between the pyrimidines and the DNA backbone
C. removal of cytosine from the DNA backbone to create an abasic site
D. deamination of cytosine to uracil
E. None of the damage types given is known to occur in cells.
What observation first suggested that H2A and H2B formed heterodimers?
What will be an ideal response?
Which one of the following proteins is not known to regulate translation through interaction with the 3' UTR of the mRNA?
A. CPEB
B. Maskin
C. eIF4E
D. PUF proteins
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