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Assertion :- Adenine and Guanine are sub...

Assertion :- Adenine and Guanine are substituated purines.
Reason : In Adenine and Guanine purine hetercylic ring has either amino or amino and oxy groups.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is not the correct explanation of assertion.

C

If assertion is true but reason is false

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
A
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Assertion : Amino acids are called alpha -amino acids. Reason : Amino acids are organic compounds containing an amino group and an acidic group as substituents on the alpha -carbon.

Assertion : The heterocyclic compounds in nucleic acid are the nitrogenous bases. Reason : Adenine and guanine are substituted pyrimidines while uracil, cytosine and thymine are substituted purines.

Knowledge Check

  • Waste products of adenine and guanine (Purines) metabolism are excreted by man as

    A
    Ammonia
    B
    Urea
    C
    Uric acid
    D
    Allantois

  • Assertion : Amino acid are called alpha -amino acids Reason : Amino acid are organic compound containing an amino goup and a carboxyl group as substituents on the same carbon, i.e., the alpha -carbon.

    A
    If both assertion and reason are true and the reason is the correct explanation of the assertion
    B
    If both assertion and reason are true and the reason is not the correct explanation of the assertion
    C
    If assertion is true but reason is false
    D
    If both assertion and reason are false

  • Assertion : The two strands in DNA are complementary. Reason : Cytosine always pasirs with guanine and thymine with adenine.

    A
    If both assertion and reason are correct and reason is correct explanation for assertion.
    B
    If both assertion and reason are correct but reason is not correct explanation for assertion.
    C
    If assertion is correct but reason is incorrect.
    D
    If assertion and reason are both incorrect.

    • Similar Questions

    Explore conceptually related problems

    Assertion : m-Bromo tolune can be prepared by m-toluidene Reason : Amino group is meta directing

    Assertion (A): The DNA has two complementary strands. Reason (R): Adenine always pairs with thymine and guanine with cytosine.

    Assertion: Purine bases present in DNA are adenine and guanine. Reason: The base thymine is present in RNA while base uracil is present in DNA.

    Read the below Statements about the structure of genetic material and identify the correct ones. I. Adenine and guanine are bases that have a double ring structure , cytosine, thymine and uracil are based with a single ring structure . II. An adenine nucleotide from DNA is the same as an adenine nucleotide from RNA , DNA adenine pairs with uracil and RNA adenine pairs with thymine. III. The base pairing that occurs in a double DNA helix and when RNA is synthesised during transcription follows the rule that a purine pairs with a pyrimidine. IV. The two Polynucleotides on a DNA molecule run in opposite directions so that the double helix formed has two strands that are parallel to each other.

    Assertion:In a DNA molecules the total quantity of purines equals the total quantity of pyrimidines Reason : Adenine pairs with thymine and cytosine pairs with guanine

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