I would say D because it involves more selection but if that one is wrong it is most likely B. But I would go with D
Answer: Purine
Explanation:
A purine is a nitrogenous base found in nucleic acids, and contains a 6-membered pyrimidine ring fused to the 5-membered imidazole ring. The most common examples of purine bases are adenine and guanine.
Thus, the nitrogen base pictured is adenine, and the nucleotide considered is a purine
Answer:
C. Are hydrophobic
Explanation:
The plasma membrane consists of phospholipids. Phospholipids have a hydrophilic head, and hydrophobic tails that are in the interior of the plasma membrane.
