(i). Explain what DNA replication refers to.

Question

Answer the following questions:

(i). Explain what DNA replication refers to.

(ii). State the properties of DNA replication model.

(iii). List any three enzymes involved in the process along with their functions.

Answer 1

(I) DNA replication refers to DNA synthesis.

(II) DNA replication is : 

i. Semi-conservative, 

ii. Semi-discontinuous, 

iii. Unidirectional

(III) . Enzymes for DNA replication

• Various enzymes are required as catalysts during DNA replication in living cells. 

• DNA-dependent DNA polymerase: It catalyses the polymerisation of deoxynucleotides on DNA template. 

• Helicase: It unwinds the DNA strand to form the replication fork. 

• DNA ligase: It joins the Okazaki fragments which are formed on the lagging strand.