In transgenics, expression of transgene in target tissue is determined by
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During replication of a bacterial chromosome DNA synthesis starts from a replication origin site and
[2004]
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The telomeres of eukaryotic chromosomes consist of short sequences of
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Crossing over that results in genetic recombination in higher organisms occurs between
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In a mutational event, when a denine is replaced by guanine, it is a case of
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DNA fingerprinting refers to
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Genetic map is one that
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Degeneration of a genetic code is attributed to the
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In the genetic code dictionary, how many codons are used to code for all the 20 essential amino acids ?
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What would happen if in a gene encoding a polypeptide of 50 amino acids, 25th codon (UAU) is mutated to UAA?
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Which one of the following triplet codes, is correctly matched with its specificity for an amino acid in protein synthesis or as ‘start’ or ‘stop’codon ?
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During translation initiation in prokaryotes, a GTP molecule is needed in
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During transcription, the DNA site at which RNA polymerase binds is called
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What does "lac" refer to in what we call the lac operon?
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When a cluster of genes show linkage behaviour they
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Exon part of m- RNAs have code for
[2002]
In a DNA percentage of thymine is 20% then what will be the percentage of guanine?
[2002]
Transformation experiment was first performed on which bacteria?
[2002]
Jacob and Monod studied lactose metabolism in E.coli and proposed operon concept. Operon concept is applicable for
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Out of 64 codons, 61 codons code for 20 types of amino acid. It is called
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In E.coli during lactose metabolism repressor binds to
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Frequency of an allele in a isolated population may change due to
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In which direction m-RNA is synthesised on DNA template ?
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At time of organogenesis genes regulate the process at different levels and at different time due to
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Gene and cistron words are sometimes used synonymously because
[2001]
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