One of the following is NOT a characteristic/ criteria of genetic materials, identify it:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → It should not provide the scope for mutations.
Option (1) Genetic material should be able to generate its replica — A criterion of genetic material. It must copy itself (replication) so that each new cell gets it.
Option (2) Genetic material should be stable chemically and structurally — A criterion of genetic material. It must not change easily, or the information would be lost.
Option (3) It should not provide the scope for mutations. — Not a criterion of genetic material. The rule is reversed: genetic material should allow slow changes (mutation), which evolution needs.
Option (4) It should be able to express itself in the form of mendelian characters. — A criterion of genetic material. Its information must show as traits in the organism.
NCERT Extract:
Properties of Genetic Material (DNA Versus RNA) – “… A molecule that can act as a genetic material must fulfill the following criteria:
(i) It should be able to generate its replica (Replication).
(ii) It should be stable chemically and structurally.
(iii) It should provide the scope for slow changes (mutation) that are required for evolution.
(iv) It should be able to express itself in the form of ‘Mendelian Characters’.”