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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): The sequence 5' G A A T T C 3' / 3' C T T A A G 5' is a palindromic nucleotide sequence. Reason (R): A palindromic nucleotide sequence in DNA reads the same on the two strands when the orientation of reading is kept the same. In the light of the above statements, choose the most appropriate answer

Options

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

Correct answer

B. Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).

Step-by-step solution

A sequence of base pairs that reads the same on the two strands when the orientation of reading is kept the same is called a palindromic nucleotide sequence in DNA. This is the exact definition given in Reason (R). The sequence 5' G A A T T C 3' reads the same in the 5' 3' direction on both the strands (the complementary strand is 3' C T T A A G 5' , which is 5' G A A T T C 3' ). Thus, it is a palindromic sequence, making Assertion (A) true. Since Reason (R) correctly defines the concept and explains why the sequen

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