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प्रश्न
During the course of evolution why DNA was chosen over RNA as genetic material? Give reasons by first discussing the desired criteria in a molecule that can act as genetic material and in the light of biochemical differences between DNA and RNA.
उत्तर
A molecule that can act as a genetic material must fulfill the following
- It should be able to generate its replica (replication).
- It should chemically and structurally be stable.
- It should provide the scope for slow changes (mutation) that are required for evolution.
- It should be able to express itself in the from of Mendelian.
Biochemical differences between DNA and RNA
- Both nucleic acid (DNA and RNA) are able to direct their duplication proteins fails for the first criteria.
- RNA is reactive, it also acts are catalyst, hence DNA is less reactive and structurally more stable then RNA.
- Presence of thymine at the place of uracil also confers additional stability to DNA.
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संबंधित प्रश्न
It is established that RNA is the first genetic material. Explain giving three reasons.
List the criteria a molecule that can act as genetic material must fulfill. Which one of the criteria are best fulfilled by DNA or by RNA thus making one of them a better genetic material than the other? Explain.
Describe the various steps of Griffith’s experiment that led to the conclusion of the 'Transforming Principle'.
Differentiate between a DNA and a RNA nucleotide.
DNA and RNA are similar with respect to ____________.
The year 2003 was celebrated as the 50th anniversary of discovery of ______.
Read the following and answer from given below:
Deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) are the two types of nucleic acids found in the living system. DNA acts as the genetic material in most organisms. Although RNA also acts as genetic material in some organisms.
In which of the following organisms, RNA acts as genetic material?
Read the following and answer from given below:
Deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) are the two types of nucleic acids found in the living system. DNA acts as the genetic material in most organisms. Although RNA also acts as genetic material in some organisms.
What is the reason for the additional stability of DNA in comparison to RNA?
Read the following and answer from given below:
Deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) are the two types of nucleic acids found in the living system. DNA acts as the genetic material in most organisms. Although RNA also acts as genetic material in some organisms.
Which of the following criteria a molecule must fulfill to act as genetic material?
Name any three viruses which have RNA as the genetic material.
