| 单词 | DNA,B Form |
| 释义 | DNA,B Form《英文msh词典》DNA,B Form [入口词] DNA,B Form [主题词] DNA [英文释义] A deoxyribonucleotide polymer that is the primary genetic material of all cells. Eukaryotic and prokaryotic organisms normally contain DNA in a double-stranded state,yet several important biological processes transiently involve single-stranded regions. DNA,which consists of a polysugar-phosphate backbone possessing projections of purines (adenine and guanine) and pyrimidines (thymine and cytosine),forms a double helix that is held together by hydrogen bonds between these purines and pyrimidines (adenine to thymine and guanine to cytosine). |
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