An enzyme called primase,3 which produces a rna primer, provides that (3 or 5)' hydroxy group needed to begin adding DNA nucleotides.
A functional group named a hydroxyl binds to some compounds that have a hydrogen and oxygen atom bound together. This functional group, which is also written hydroxy, plays crucial roles in the actions of both alcohols and organic acids.
A substance classified as an alcohol has an aliphatic side atom attached to a hydroxyl (OH) substituent. Since OH serves as all alcohols' functional group, we frequently refer to alcohols by their generic formula Rh, whereby R is an alkyl. In nature, alcohols are widespread.
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