Question

In this type of DNA replication, of the two newly formed molecules, one is purely a new one and the other is an old one

(a) dispersive

(b) conservative

(c) semiconservative

(d) both (b) and (c)​

Answer 1

Semi conservative


See the image

Answer 2

Answer:

Correct option -

c. Semiconservative

Explanation:

• In semi conservative type of DNA replication, both the parental DNA strands are used. On both the strands, DNA synthesis occur such that after the process of replication, each newly formed DNA contains one old strand and one new strand. One of the parental strand work as a template for the synthesis of new daughter strand. Thus, a hybrid DNA is formed as a new DNA molecule.
• Conservative - One helix is built entirely of old DNA, while the other is created entirely of new DNA, as a result of replication.
• Dispersive - Fragments of new DNA are formed on old DNA strand. Both the strands of DNA contain parental as well as daughter DNA, but in fragments.