生物學小問題？生物學小問題？

Question

Mutational 〝hot spots〞in human DNA
a) always occur in genes that are transcribed
b) are common at cytosines that have been modified to 5-methylcytosine
c) involve long stretches on nucleotides
d) occur where there are triplet repeats, such as CTG
e) are very rare in genes that code for proteins

Answer 1

and the winner goes to..........(b)

DNA has so-called hotspot where mutations occur up to 100 times more frequently than the normal mutation rate. A hotspot can be at an unusual base,e.g., 5-methylcytosine (5-methylcytosine is the methylated form of cytosine....)