Round 9: Tossup 16

The donation of this functional group is accomplished by a cofactor consisting of an s-adenosyl group attached to an amino acid. The enzyme Dam in E. coli donates this functional group, which marks the template strand during mismatch repair. (15[1])Uracil and thymine solely differ by the presence of this functional group. CpG islands are hotspots for the (*) addition of this functional group near promoter sequences. Unlike the addition of an acetyl (10[1])group, the addition of this functional group (10[2])on histones can either repress or active transcription. For 10 points, name this one carbon functional group symbolized CH3. ■END■

Back to tossups

Buzzes

Summary