There is only one structure feasible for a tetrahedral molecule with such a formula, under the supposition that A is in the center of the tetrahedredon. In this case X and Y are in the vertices of the tetrahedron.
If you draw several figures changing the position of the X's and the Y around the center (A), you will see that all are equivalent.
This is the case of the product CH3Cl, named chloromethane, which, for the same reason given above, does not have isomers.
Answer:
Topoisomerase
Explanation:
Topoisomerase is an enzyme that is involved in the unwinding of Deoxyribonucleic acid (DNA). They are involved in double stranded DNA and they help to relieve the making of supercoils.
Topoisomerase play an important role during DNA replication, as the prevent the the twisting of the DNA double helix ahead of the replication fork. In other words, they ensure that the DNA open up for unwinding without being tightly wound.
28 sex cells the pea plant will have
