正在加载图片...
uestion 1 a) Indicate whether each of the following statements is true or false. If false, correct the statement or provide a brief explanation for why it is false ODNA replication is initiated at promoter sequences in the dNA ii)RNA polymerase requires primers to initiate RNA synthesis ii) Okazaki fragments are the short fragments of dna that are produced on the leading strand at the dna replication fork iv)The 5 to 3 direction of DNA synthesis implies that deoxyribonucleotides are added to the 5 OH group on the growing strand v)Transcription is terminated at stop codons in the mRnA b)shown below is the DNA sequence of a gene from a virus that encodes a short viral peptide. Also hown is the sequence of the mRNa synthesized from this gene genomic DNA sequence 5 -AGCTCATGTGCGAGTCCTGACGCTGACTAGG-3 3 -TCGAGTACACGCTCAGGACTGCGACTGATCC-5 mature mRNA sequence(G = G cap) 5-G UCAUGUGCGAACGCUGACUAGGAAAAAAAA..-3 iIn the genomic DNA sequence shown above, draw a box around each of the two exons in the ii)In the mRNA above, some nucleotides are present that are not coded for in the genomic dNA sequence. Name the two processes that have occurred to add these nucleotides to the mrNA ii How many amino acids are in the viral peptide encoded by this gene? iv)Is this virus more likely to replicate in prokaryotic or eukaryotic cells? Briefly explain your2 Question 1 a) Indicate whether each of the following statements is true or false. If false, correct the statement or provide a brief explanation for why it is false. i) DNA replication is initiated at promoter sequences in the DNA. ii) RNA polymerase requires primers to initiate RNA synthesis. iii) Okazaki fragments are the short fragments of DNA that are produced on the leading strand at the DNA replication fork. iv) The 5' to 3' direction of DNA synthesis implies that deoxyribonucleotides are added to the 5' OH group on the growing strand. v) Transcription is terminated at stop codons in the mRNA. b) Shown below is the DNA sequence of a gene from a virus that encodes a short viral peptide. Also shown is the sequence of the mRNA synthesized from this gene. genomic DNA sequence: 5'-AGCTCATGTGCGAGTCCTGACGCTGACTAGG-3' 3'-TCGAGTACACGCTCAGGACTGCGACTGATCC-5' mature mRNA sequence (G* = G cap): 5'-G*UCAUGUGCGAACGCUGACUAGGAAAAAAAA....-3' i) In the genomic DNA sequence shown above, draw a box around each of the two exons in the gene. ii) In the mRNA above, some nucleotides are present that are not coded for in the genomic DNA sequence. Name the two processes that have occurred to add these nucleotides to the mRNA. iii) How many amino acids are in the viral peptide encoded by this gene? _______ iv) Is this virus more likely to replicate in prokaryotic or eukaryotic cells? Briefly explain your reasoning
<<向上翻页向下翻页>>
©2008-现在 cucdc.com 高等教育资讯网 版权所有