Bild 1 midterm3 1 answers

Bild 1 midterm3 1 answers - Kang Ko OH Wed 11am-11:50am at...

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Kang Ko OH: Wed., 11am-11:50am at CLICS 2 nd floor [email protected] Midterm Practice Questions -- Choose ONE best answer. 1. Which of the followings is/are true about eukaryotes and prokaryotes? A. prokaryotes use RNA as their hereditary information, and eukaryotes use DNA as their hereditary information B. In prokaryotes, transcription, mRNA processing and translation occur simultaneously unlike in eukaryotes C. prokaryotes do not have a nuclear membrane, but eukaryotes have their DNA surrounded by a nuclear membrane D. eukaryotes are evolutionarily more successful organisms than prokaryotes because of their complexity E. B and C 2. The processes to make protein from gene can be ordered as: A. replication mRNA processing translation B. translation transcription splicing C. replication transcription translation D. transcription mRNA processing translation E. none of the above 3. 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 4. In transcription: A. DNA does not change at all B. DNA is transcribed into tRNA, which will then be processed before exiting nucleus C. both sides of DNA helix are transcribed D. there is a DNA promoter region that allows DNA polymerase to bind E. number of DNA molecules decreases due to unwinding of the helix 5. mRNA after transcription: A. is a single stranded molecule, unlike DNA double helix B. contains more genetic information than needed C. has complementary nucleotides to the template DNA strand, except that thymine is replaced by uracil D. A and C E. all of the above 6. Which of the following is not found in mRNA processing in eukaryotes? A. removal of introns B. alternative splicing C. addition of poly-A-tail 1
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Kang Ko OH: Wed., 11am-11:50am at CLICS 2 nd floor [email protected] D. addition of C-cap E. none of the above 7. 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 8. The correct order of the following steps in translation is:
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This note was uploaded on 06/12/2008 for the course BILD 1 taught by Professor Boulanger during the Spring '08 term at UCSD.

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Bild 1 midterm3 1 answers - Kang Ko OH Wed 11am-11:50am at...

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