True statements about the nucleic acid include:
a. contains purine and pyrimidine which are bound together by covalent bonds
b. there is always an equal concentration of purine and pyrimidine
c. in RNA, thymine is replaced by uracil
d. introns is more common than exons on the DNA
e. the histones mark the excision site
a. contains purine and pyrimidine which are bound together by covalent bonds
b. there is always an equal concentration of purine and pyrimidine
c. in RNA, thymine is replaced by uracil
d. introns is more common than exons on the DNA
e. the histones mark the excision site