Gene Expressions questions

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Gene Expression Quiz Question 1 A gene codes for a protein that is 500 amino acids long. A nonsense mutation occurs at the 6th codon. What is the result? A. A polypeptide that is 5 amino acids long. B. A polypeptide that is missing the 6th amino acid. C. A polypeptide that has the correct amino acids for the first 5 position, and then incorrect amino acids after that. D. A polypeptide that has a different amino acid at position 6. Question 2 When a cell is getting ready to divide into two cells (during the process of mitosis), which process must first happen so that the entire genome can be passed to the new daughter cells? A. translation B. PCR C. DNA replication D. transcription Question 3 A gene codes for a protein that is 500 amino acids long. Which of the following mutations is likely to be the most deleterious? A. a nonsense mutation at the 490th codon B. a nonsense mutation at the fifth codon C. a missense mutation at the 490th codon D. a missense mutation at the fifth codon Question 4 Transcription produces: A. Proteins from an RNA template B. Proteins from a DNA template C. RNA from a DNA template D. DNA from a DNA template Question 5 The tRNA with UAU as the anticodon would be attached to which amino acid? A. tryrosine B. leucine C. isoleucine D. serine Question 6 Identify the flow of genetic information during protein synthesis in a eukaryotic Cell. A. Translation produces a tRNA molecule in the nucleus; the tRNA transports a protein to the cytoplasm of the cell. B. DNA makes a copy of itself which is transported from the nucleus to the cytoplasm by a chain of amino acids. C. mRNA moves a protein to the DNA and makes a copy of the DNA through translation. D. Transcription produces an mRNA molecule in the nucleus. The mRNA moves to the cytoplasm where translation occurs. Question 7 Which of the RNA molecules can best be described as a copy of the gene that codes for a protein? (This RNA molecule carries the genetic information necessary to build a protein) A. mRNA B. tRNA C. rRNA D. all of these Question 8 Which of the following statements is correct regarding DNA replication, PCR, and transcription? A. All three processes require primers. B. All three processes result in a double stranded product. C. All three processes happen in the cell naturally. D. Both DNA replication and PCR use DNA polymerases. Question 9 Which of the following mutations would not be noticeable when studying the expressed traits (or proteins) of an organism? A. nonsense B. frameshift C. missense D. silent Question 10 Which nitrogen base is not found on nucleotides used to build the new molecule in transcription? A. A B. C C. U D. G E. T
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