Short Answer TypeGroup the following as nitrogenous bases and nucleosides:
Adenine, Cytidine, Thymine, Guanosine, Uracil and Cytosine.
Depending upon the chemical nature of the template (DNA or RNA) and the nature of nucleic acids synthesised from it (DNA or RNA), list the types of nucleic acid polymerases.
Name the scientist who suggested that the genetic code should be made of a combination of three nucleotides.
Explain the basis on which he arrived at this conclusion.
He proposed that if 20 amino acids are to be coded by 4 bases, then the code should be made up of three nucleotides. 43 = 64, if it was 2 codon then 42 = 16 which is less than 20 and a 4 codon would give 256 amino acids which is much more than required. So, the codon was proposed to be triplet.
In which phase of the cell cycle does replication occur in Eukaryotes? What would happen if cell-division is not followed after DNA replication?
A DNA segment has a total of 1000 nucleotides, out of which 240 of them are adenine containing nucleotides. How many pyrimidine bases this DNA segment possesses?
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