Question

watson and crick knew which base pairs paired together. what are the correct pairings? a-u and t-c a-g and t-u t-c and g-g a-t and c-g

Explanation:

In DNA (the structure Watson and Crick studied), adenine (A) pairs with thymine (T), and cytosine (C) pairs with guanine (G). Uracil (U) is in RNA, not DNA for these base - pairings in the context of Watson - Crick's DNA model. So the correct pairing is A - T and C - G.

Answer:

D. A - T and C - G (assuming the last option is labeled D, if the options are labeled as per the order: first option A, second B, third C, fourth D)