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Standard X
Biology
DNA
Question

A molecule that can act as a genetic material, must fulfill the traits given below, except
  1. It should be unstable structurally and chemically
  2. It should provide the scope for slow changes that are required for evolution
  3. It should be able to express itself in the form of 'Mendelian characters'
  4. It should be able to generate its replica

A
It should be able to express itself in the form of 'Mendelian characters'
B
It should be able to generate its replica
C
It should be unstable structurally and chemically
D
It should provide the scope for slow changes that are required for evolution
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Solution
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A genetic material should be chemically and structurally stable so as to maintain its integrity with age, cell cycle and different physiology of individuals.
At the same time, it should be prone to random changes that impart genetic variations and serve as raw material for evolution.
Inheritance of genetic material requires its replication with each cell division to ensure its transmission to progeny.
It should carry the information required for regulation of whole cell functioning and the information should be expressed as functional proteins.
So, the correct answer is option A.

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Q1
Which of the following criteria should be fulfilled by a molecule to act as genetic material?
(i) It should be able to replicate.
(ii) It should be structurally and chemically stable.
(iii) It should undergo slow mutations.
(iv) It should be able to express itself in the form of 'Mendelian characters'

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Q2
Choose the correct answer from the alternatives given :
Which of the following criteria should be fulfilled by a molecule to act as a genetic material?
(i) It should be able to replicate.
(ii) It should be structurally and chemically stable.
(iii) It should be able to undergo slow mutations.
(iv) It should be able to express itself in the form of Mendelian characters.
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What does the line signify that "Genetic material must be able to express itself in the form of mendelian characters"?
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