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In lac operon, structural gene ‘Z’ synthesises
The processes by which DNA forms mRNA and mRNA forms protein are respectively
Eukaryotic chromosomes
Prokaryotic chromosomes are circular and contain termination sequences.
How many base pairs (bp) are found in the haploid genome of humans?
The number of base pairs (bp) found in the haploid genome of humans is 2.9 × 109.
The telomeres of eukaryotic chromosomes consist of short sequences of
The following ratio is generally constant for a given species:
According to Chargaff purines and pyrimidines are in equal amounts. Purine (adenine) is equimolar with pyrimidine (thymine) and purine (guanine) is equimolar with pyrimidine (cytosine). Base ratio is specific for species.
Crossing over that results in genetic recombination in higher organisms occurs between
Crossing over occurs between non–sister chromatids of two homologous chromosomes. Homologous chromosomes form bivalent. Crossing over occurs between chromosomes in a nucleus.
Reverse transcriptase is
In a mutational event, when adenine is replaced by guanine,it is a case of
In transition substitution a purine is replaced by another purine base(A with G or vice versa). In transversion substitution a purine is replaced by a pyrimidine base or vice versa. Frameshift mutation is a type of mutation where the reading of codons is changed due to insertion or deletion of nucleotides. Transition is the formation of RNA over the template of DNA.
Degeneration of agenetic code is attributed to the
According to the Wobble hypothesis, tRNA anticodon has the ability to wobble at its 5' end by pairing with even non-complementary base of mRNA codon. It corresponds to third base degeneracy of the codons.