_________ In normal cells there are three stop codons and these are recognized b
ID: 91356 • Letter: #
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_________ In normal cells there are three stop codons and these are recognized by tRNAs with specific anticodons. _______ You observe a very large pairing loop in meiosis. It is most likely to be from a translocation ______ After sequencing the wild type genomic clone for the AAA gene you find a 32 base pair insertion in the middle of the gene that is missing in the wild type cDNA clone of this gene. The 32bp are due to an insertion mutation. ________ The probability of isolating a gene from a genomic library is highly dependent on the cell type from which the library was originally constructed ____ The probability of isolating a gene from a cDNA library is not dependent on the cell type from which the library was originally constructed __________ Two individuals have identical amino acid sequences for their histone proteins. There is no possibility that an RFLP exists between these two individuals in the DNA sequence encoding the histone gene. _____ cDNA libraries possess 5' and 3' untranslated regions (UTR) ________ A polymorphic single base site is called a SNP _______Most active genes reside in chromatin ______ Histones, non-histone proteins and DNA together form chromatin in the eukaryotic nucleusExplanation / Answer
1 A ) generally the standard genetic code, there are three mRNA stop codons: UAG (amber), UAA (ochre), and UGA ( opal or umber).
2 A ) due to genomic imbalance
3 A ) in frame shift mutation
4 A ) from recombinant DNA molecule
5 A ) by using RNA viruses
6 A ) valine and leucine
7 A ) A mRNA should include both a coding region which has a long open-reading frame as well as non-coding sequences (frequently called UTRs*, for untranslated regions) at both the 3' and 5' ends.
8 A ) the DNA between genes
9 A ) memory genes
10 A ) Nucleosomes
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