A small stretch of DNA strand that codes for a polypeptide is shown below:
3' -- ----- CAT CAT AGA TGA AAC --- --- -- 5'
(a) Which type of mutation could have occurred in each type resulting in the following mistake during replication of the above original sequence ?
i. 3' ..... ... ... CAT CAT AGA TGA ATC... .... .. 5'
ii. 3' ... ... ...CAT ATA GAT GAA AC..... .... ..5'
(b) How many amino acids will be translated from each of the above strands (i) and (ii) ?

Explanation

(a) i. point mutation/single base substitution
ii. Point mutation/ single base deletion
(b) i. 4 aminoacids
ii. 4 aminoacids