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deoxythymidinetriphosphate (dTTP) is the nucleotide in DNA that is not present in RNA. The corresponding base is thymine (T). RNA contains the nucleotide uridinetriphosphate (UTP) instead. In their incorporated forms, the will be in the monophosphate state.Note: Someone previously changed this to read Deoxythymine is the nucleotide in DNA that is not present in RNA.NA contains the nucleotide uridinetriphosphate (UTP) instead. In their incorporated forms, the will be in the monophosphate state. Note: Someone previously changed this to read Deoxythymine is the nucleotide in DNA that is not present in RNA.
A: CRISPR âspacerâ sequences are transcribed into short RNA sequences (âCRISPR RNAsâ or âcrRNAâ) capable of guiding the system to matching sequences of DNA. When the target DNA is found, Cas9 â one of the enzymes produced by the CRISPR system â binds to the DNA and cuts it, shutting the targeted gene off. Using modified versions of Cas9, researchers can activate gene expression instead of cutting the DNA. These techniques allow researchers to study the geneâs function.