Question

What is tautomeric shift? a. Tautomeric shift is an intermolecular electron shift that changes the bonding structure of the molecule.b. Tautomeric shift is an intramolecular electron shift that changes the bonding structure of the molecule.c. Tautomeric shift is an intramolecular proton shift that changes the bonding structure of the molecule.d. Tautomeric shift is an intermolecular proton shift that changes the bonding structure of the molecule.

Answer 1

Answer:

The right answer is C.

Explanation:

Tautomeric shift type of mutation that happens spontanously by intramolecular proton (hydrogen ion) shift. Guanine and thymine normally found in their keto form but rarely they can be also found in enol forms. Moreover, while adenine or cytosine are normally found in amino forms they can rarely switch into their imino forms by intramolecular proton shift (see figure).