Need help please. ON 10 BIOL3402 Genetics Quiz 2 Fall 2018 Name: 1. The first am

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Need help please.

ON 10 BIOL3402 Genetics Quiz 2 Fall 2018 Name: 1. The first amino acid coded buy initiation codon is A) Phenylalanine B) Alanine D) Tyrosine C) n-formyl-Methionine 2. The enzyme to synthesize mRNAs in bacteria is A) Histone B) RNA polymerase D) Primase C) DNA polymerase 3. A nonsense mutation is caused by A) a mutated sigma subunit of RNA polymerase B) a termination triplet that occurs in the coding region of a gene 4. There are many forms of (sigma) subunits, and each form recognizes different promoter sequences, which in turn provide specificity to the initiation of transcription A) True B) False 5. What DNA segment would RNA polymerase start to unwind DNA double helix? A) Terminator C) Enhancer B) Transcription start site D) Promoter 6. Which of the following modification(s) after transcription will eukaryotic mRNAs undergo? A) 5' Cap addition C) intron removal B) 3' poly(A) tail addition D) All above 7. Which of the RNA polymerase will be responsible for transcribing all eukaryotic mRNAs? A) Polymerase I C) Polymerase III B) Polymerase II D) Polymerase IV 8. Eukaryotic cell translation usually happens in nucleus. A) True B) False 9. Which of the following molecules can carry the needed amino acids for protein synthesis? A) mRNAs C) tRNAs B) Ribosomes D) DNAs 10. Which of the following rRNAs have the highest level of modified bases? A) mRNAs C) rRNAs B) tRNAs D) gRNAs

Explanation / Answer

1. c. n-formyl-methionine

2. b. RNA polymerase

3. b. a termination triplet that occurs in the coding region of the gene

4. a. True

5. b. transcription start site

6. d. all above

7. Polymerase II

8. b. False

9. c.tRNAs

10. b tRNAs

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