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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.

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The correct Answer is:
A
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Waste products of adenine and guanine (Purines) metabolism are excreted by man as

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.

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.

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

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

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

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

MOTION-MOLECULAR BASIS OF INHERITANCE-EXERCISE - 4 (ASSERTION & REASON)
  1. Assertion :- Adenine and Guanine are substituated purines. Reason : ...

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  2. Assertion :- Normally the genetic code is degenerate. Reason : One a...

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  3. Assertion :- UGG is a chain termination codon. Reason : It does not ...

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  4. Assertion :- There occur 64 codons iin dictionary of genetic code Re...

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  5. Assertion :- Constnt diameter of DNA double helix is 20Å Reason : P...

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  6. Assertion :- In a DNA molecule, A-T rich parts malt before G-C rich pa...

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  7. Assertion :-Wobbling process estabiished the enconomy of t-RNA. Rea...

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  8. Assertion :- Replication and transcription occur in the nucleus but tr...

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  9. Assertion :- Hydrogen bonds between hase pairs it is only mean to stab...

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  10. Assertion :- Unequivocal proof that DNA is the genetic material came f...

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  11. Assertion :- RNA is less stable then DNA. Reason : In RNA'2 - OH gro...

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  12. Assertion :- RNA is best material for transmission of genertic informa...

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  13. Assertion :- In Meselson and Stahl experiment ^(15)NH(4)Cl can be sepa...

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  14. Assertion :- The DNA strand which does not code for anything is referr...

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  15. Assertion :- The split-gene arrangement complicates the definition of ...

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  16. Assertion :- RNA polymerase associates with sigma-factor and rho-facto...

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  17. Assertion :- t RNAs are specific for each amino acid but there are no ...

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  18. Assertion :- Inhibition of transcription is the only method of regula...

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  19. Assertion :- In lac operon, a polycistronic structural gene is regulat...

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  20. Assertion :- The gene I codes for the repressor of the lac operon. R...

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