知識(shí)貝殼
知識(shí)貝殼
所屬欄目：英漢雙解生物技術(shù)與遺傳工程
One of the four major bases found in nucleic acids. Adenine and guanine are purines; cytosine,thymine,and uracil are pyrimidines. These nitrogenous bases are a component of the basic building blocks of nucleic acids called nucleotides. Within the DNA doub ......（本文共 365 字 ） [閱讀本文] >>