$DNA$ acts as a template for the synthesis of which of the following?

The substitution of one purine $N_2$ base with another purine base or one pyrimidine $N_2$ base with another pyrimidine base is known as:

Which of the following statements is incorrect?

The complete flow chart of the Central Dogma is:

Given below are two statements.
Statement $I$: Heterocatalytic function of $DNA$ includes transcription and translation.
Statement $II$: $A$ unique feature of $DNA$ molecule which helps in its semiconservative duplication is the complementary nature of two strands.
In the light of the above statements,choose the correct answer from the options given below.

Which one of the following correctly represents the manner of replication of $DNA$?