The two strands of DNA are held together to form a double helix through hydrogen bonding between the bases in DNA. Below are cytosine and guanine two bases. How many hydrogen bonds can form between the bases in their current orientation? H H-N N-H R N-H R H Guanine Cytosine 1 4

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Q: NH, но он H. H H он он ncorrect

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Diol

In chemistry there are so many chemical compounds that have a hydroxyl group but a chemical compound having two hydroxyl groups (-OH) is termed as a diol. It also implies the presence of two alcohols whereas polyols contain two or more than two hydroxyl groups (-OH). Glycol or 1,2-diol is an aliphatic diol that has two alcohol groups on adjacent carbon atoms. In industries, the most commonly used diol is ethylene glycol.