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Transcription

In both prokaryotes and eukaryotes, the second function of DNA (the first was replication) is to provide the information needed to construct the proteins necessary so that the cell can perform all of its functions.

1. Transcription

Transcription

2. Transcription (2)

Transcription (2)

3. Transcription (3)

Transcription (3)

4. Transcription (4)

Transcription (4)

5. Transcription (5)

Transcription (5)

6. Key terms check

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a permanent variation in the nucleotide sequence of a genome

7. Key terms check

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a nitrogen-containing molecule that acts as a base; often referring to one of the purine or pyrimidine components of nucleic acids

8. Key terms check

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the strand of DNA that is not used to transcribe mRNA; this strand is identical to the mRNA except that T nucleotides in the DNA are replaced by U nucleotides in the mRNA

9. Key terms check

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a form of DNA repair in which the DNA molecule is unwound and separated in the region of the nucleotide damage, the damaged nucleotides are removed and replaced with new nucleotides using the complementary strand, and the DNA strand is resealed and allowed to rejoin its complement

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