A molecule that can act as a genetic material must fulfill the traits given below, except
- it should be able to express itself in the form of ?Mendelian characters'
- it should be able to generate its replica
- it should be unstable structurally and chemically
- it should provide the scope for slow changes that are required for evolution
The Correct Option is C
Solution and Explanation
Option 3: It should be unstable structurally and chemically.
Explanation:
- Option 1: It should be able to express itself in the form of Mendelian characters. This is a necessary trait for genetic material, as genetic material must be able to pass on traits to the next generation and express these traits according to Mendelian inheritance.
- Option 2: It should be able to generate its replica. This is another crucial trait of genetic material. DNA and RNA must be able to replicate themselves to ensure that genetic information is passed on to progeny.
- Option 3: It should be unstable structurally and chemically. This is incorrect. Genetic material must be stable structurally and chemically to preserve the integrity of the genetic code and ensure proper replication and transmission of genetic information.
- Option 4: It should provide the scope for slow changes that are required for evolution. This is true as well. Genetic material must have the ability to undergo mutations, which are necessary for evolution over time.
Conclusion:
The correct answer is Option 3, as genetic material needs to be stable, not unstable, in order to preserve and pass on genetic information accurately.
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Concepts Used:
The Molecular Basis of Inheritance
DNA Replication:
DNA synthesis is commenced at particular points within the DNA strand referred to as ‘origins’, which are certain coding regions. There are numerous origin sites, and when replication of DNA starts, these sites are mentioned as replication forks. Within the replication, the complex is the enzyme DNA Helicase, so that they can be utilized as a template for replication. DNA Primase is another enzyme that's essential in DNA replication.
RNA:
Ribonucleic acid (RNA) is an essential biological macromolecule that exists all together in biological cells. It is principally involved in the synthesis of proteins, that carry the messenger instructions from DNA, which itself contains the genetic instructions needed for the event and maintenance of life. In some viruses, RNA, in spite of DNA, carries genetic information.
Genetic Code:
Genetic code is the term we use in the manner that the four bases of DNA--the A, C, G, and Ts--are strung together in a way that the ribosome, the cellular machinery, can read them and switch them into a protein. In the ordering, every three nucleotides during a row count as a triplet and code for one amino alkanoic acid.
Read More: Molecular Basis of Inheritance