Based on substitution

Assertion: Alcohols give only substitution products with HX and not elimination product. Reason: X^(-) is a very weak base which cannot abstract proton from alcohol.

The number of base substitution possible in amino acid codons is

Errors during DNA replication , repair or recombination can lead to base -pair substitutions ,Such chnages are callled :

Sickle cell anemia results from a single base substitution in a gene, thus it is an example of

The mutations that involve addition, deletion or substitution of a single base pair in a gene are referred to as

Assertion : Addition or deletion of a base from a gene produce entirely a new polypeptide. Reason : Substitution mutation replaace a single amino acid in a polypeptid.