Practice Test 3

Practice Test 3 - Biology 110 Practice Exam #3 Tae Sung...

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Biology 110 Practice Exam #3 Tae Sung Practice Exam (133 possible points/131 points) Multiple-choice questions Each multiple-choice question is worth 3 points. 1. Which of the following shows correct processes to make protein from gene? A. replication mRNA processing translation B. translation transcription splicing C. replication transcription translation D. transcription mRNA processing translation E. none of the above 2. Which of the following correctly describes a ‘codon’? A. is a term for the combination of three nucleotides in mRNA B. each codon can give rise to only one of the 20 amino acids C. many codons can give rise to the same amino acid of the 20 amino acids D. A and B E. all of the above 3. Which of the following occurs during the transcription? A. DNA is transcribed into tRNA, which will then be processed before exiting nucleus B. both sides of DNA helix are transcribed C. there is a DNA promoter region that allows DNA polymerase to bind D. number of DNA molecules decreases due to unwinding of the helix E. all of the above 4. Which of the following cannot be found in mRNA processing in eukaryotes? A. removal of introns B. alternative splicing C. addition of poly-A-tail D. addition of C-cap E. none of the above 5. Which of the following is not true about translation? A. start codon, AUG, is always on 5’ side because translation occurs in 5’ to 3’ direction B. stop codons do not give rise to any amino acid C. tRNA carries an amino acid that corresponds to specific codon on mRNA molecule D. because start codon brings in methionine, all proteins present in eukaryotes must have methionine at the end of polypeptides E. the only tRNA that can enter P site from the start is tRNA with methionine 6. What happens to mRNA after transcription? A. is a single stranded molecule, unlike DNA double helix
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Practice Test 3 - Biology 110 Practice Exam #3 Tae Sung...

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