biol1011 chap 7

biol1011 chap 7 - Note These answers are pretty correct but...

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Note: These answers are pretty correct, but I would look them up yourself just in case! Biology 1011 Test Three Questions Chapter 7 Questions 1. Which of the following is incorrect ? A. DNA polymerase -- makes a molecule of DNA from a DNA template B. RNA polymerase -- makes a molecule of RNA from an RNA template C. DNA ligase -- joins segments of DNA D. Ribosomes -- protein synthesis E. LacI (repressor) -- inhibitor of lactose operon expression. 2. In transcription, Table 1 Codon on mRNA and corresponding amino acid UUA leucine UAA nonsense GCA alanine AAU asparagine AAG lysine UGC cysteine GUU valine UCG, UCU serine 3. (Use Table 1). If the sequence of amino acids encoded by a strand of mRNA is serine- alanine-lysine-leucine, what is the order of bases in the mRNA. 4. (Use Table 1). The anticodon for valine is A. GUU B. CUU C. CTT D. CAA E. GTA 5. (Use Table 1) What is the size of the peptide encoded by the following mRNA UUAUUAGCAUAAUGCAAU A. 18 B. 9 C. 6 D. 3 E. 2
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6. The base sequence of a messenger RNA molecule that is complementary to a genetic code of CGTTAGA would be expressed as 7. In the operon, genes that code for enzyme proteins are called A. structural genes B. operator genes C. repressor genes D. inducer genes 8. The mRNA that codes for a particular protein will have ____ nucleotides for each amino acid in the protein. A. 1 B. 2 C. 3 D. 4 E. 5 9. The enzyme that is responsible for the synthesis of DNA from a DNA template is 10. All the following are true of the bacterial chromosome except 11. All the following apply to the process of protein synthesis except 12. The major activity of transcription is to A. copy DNA. B. pair codons with anticodons. C. produce amino acids. D. produce RNA molecules
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