The southern polar jet stream<span> mostly circles </span><span>Antarctica.</span>
Answer:
Your answers are correct or at least from the information I know and read super sorry if wrong but everything checks out!
The secondary structure is responsible for the shape that the nucleic acid assumes. The bases in the DNA are classified as purines and pyrimidines. ... A purine base always pairs with a pyrimidine base (guanine (G) pairs with cytosine (C) and adenine (A) pairs with thymine (T) or uracil (U)).
I attached a picture showing how to do it
