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NEETZoologyMolecular Basis of Inheritance

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): The genetic code is considered nearly universal, but exceptions exist in mitochondrial codons and some protozoans. Reason (R): Some amino acids are coded by more than one codon, which makes the genetic code degenerate. In the light of the above statements, choose the most appropriate answer from th

Options

  1. ABoth Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)
  2. BAssertion (A) is true but Reason (R) is false
  3. CAssertion (A) is false but Reason (R) is true
  4. DBoth Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)

Correct answer

D. Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)

Step-by-step solution

Assertion (A) is true: The genetic code is nearly universal (for example, from bacteria to human, UUU would code for Phenylalanine), but NCERT explicitly notes that there are some exceptions to this rule in mitochondrial codons and in some protozoans. Reason (R) is true: Some amino acids are coded by more than one codon, and this property is known as the degeneracy of the genetic code. Both statements are factually correct and represent independent properties of the genetic code. However, the degeneracy of the code

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