21) What is synthesized during transcription? 22

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21) What is synthesized during transcription? 22. Which nucleotides base pair in DNA, which nucleotides base pair in RNA? 23. Portions of the eukaryotic mRNA molecule that do not code for protein and must be excised prior to translation are called what? 24. What are exons? Introns? 25. Give an example of a bacterium that exhibits a visible phenotypic expression. Include the correct genus and species of the microbe and the phenotype it expresses. 26. What is proof reading 27. Where does the energy required for DNA replication come from? 28. How many amino acids are coded for in the genetic code? 29. AUG is what in the genetic code. It codes for what 30. What are the 3 stop codons?