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What is the name of the enzyme that attaches an amino acid to the 3' end of its cognate tRNA ?

Which term describes the three codons (UAG, UAA, and UGA) that do not code for an amino acid and do not have a corresponding tRNA ? 1. Missense codons ✓ 2. Termination codons 3. Degenerate codons 4. Anticodons .

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What is the name of the enzyme that attaches an amino acid to the 3' end of its cognate tRNA ?

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  1. Which term describes the three codons (UAG, UAA, and UGA) that do not code for an amino acid and do not have a corresponding tRNA? 1. Missense codons ✓ 2. Termination codons 3. Degenerate codons 4. Anticodons

  2. What is the name of the enzyme that attaches an amino acid to the 3' end of its cognate tRNA? 1. transfer RNAse 2. initiation factor 3. peptidyltransferase ✓ 4. aminoacyltRNAsynthetase

  3. A DNA mutation resulting in a new codon that specifies a different amino acid from the original codon is referred to as a ✓ 1. missense mutation 2. nonsense mutation 3. somatic mutation 4. frame-shift mutation 5. null mutation

  4. point mutation in the DNA that replaces a purine with a pyrimidine is referred to as a 1. Nonsense mutation 2. Transition mutation ✓ 3. Transversion mutation 4. Missense mutation 5. Tautomeric shift

  5. Pyrimidine dimers (or thymine dimers) are a type of DNA damage that is most often caused by 1. base analogs ✓ 2. UV radiation 3. alkylating agents 4. transposons 5. reactive oxidants

  6. Individuals with the genetic disorder _________________________ are predisposed to skin cancers due to defects in their ability to carry out nucleotide excision repair. 1. Hemophilia 2. Progeria 3. Werner syndrome 4. Bloom syndrome ✓ 5. Xerodermapigmentosum

  7. Announcements Change in class schedule: There will be NO CLASS on Monday, March 19! Exam 3 is moved to WEDNESDAY, March 28 Exam 4 is moved to WEDNESDAY, April 18

  8. BIO 304 Lecture 21

  9. Co-transcriptional processing

  10. Exon/intron boundaries have conserved sequences

  11. The splicing reaction

  12. Alternative splicing rat alpha-tropomyosin gene

  13. The flow of genetic information

  14. The genetic code is non-overlapping

  15. Genetic code is read in triplets

  16. Only one correct reading frame

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