Genetics Assignment Translation of Proteins 1. Some genetic mutations result in

Question

Genetics Assignment Translation of Proteins 1. Some genetic mutations result in protein products containing similar amino acids. This is due to the fact that the genetic code is what? a) Degenerate b) Ordered c) Universal d) Semiconservative 2. The inosine found in the 5' anticodon position of certain tRNAs will NOT bind to which of the following 3 codon bases in mRNA(put the best answer)? a) A b) U c) C d) G e) it can bind to all of them 3. In prokaryotic translation, f-methionyl-tRNAmet first associates with which position in the large ribosomal subunit? a) Aminoacyl (A site) c) Exit (E site) b) Peptidyl (P site) d) None of the above 4. Which of the following contains the Shine-Dalgarno sequence in prokaryotes? a) 5S rRNA b) 23S rRNA c) mRNA d) Shine-Dalgarno sequence is only used in eukaryotes 5. Which of the following is responsible for the peptidyl transferase activity of the prokaryotic ribosome? a) 5S rRNA c) 28S rRNA b) 23S rRNA d) Small subunit of ribosome 6. Which factor is responsible for ribosomal translocation (movement)? a) EF-T b) EF-Tu c) IF-3 d) EF-G e) IF-2 7. Which factor is responsible for bringing new charged tRNAs to the A site? a) EF-T b) EF-Tud) EF-G c) IF-3 e) IF-2 8. Which of the following is NOT a stop codon (all shown 5' to 3')? a) UGA b) UAG c) AGU d) UAA 9. Some genetic mutations fail to code for a different amino acid. This is due to the fact that the genetic code is what? a) Degenerate b) Ordered c) Universal d) Semiconservative

Explanation / Answer

Ans. 1 (a) degenerate

Ans. 2 (d) G

Ans. 3 (aminoacyl/A-site)

Ans. 4 (c) mRNA

Ans. 5 (b) 23s rRNA

Ans. 6 (d) EF-G

Ans. 7 (b) EF-Tu

Ans. 8 (c) AGU

Ans. 9 (b) ordered

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