Ophthalmology Interview Question:

True statements about the nucleic acid include:

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* 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

Answer a. F b. T c. T d. F e. F
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