Home
Class 12
CHEMISTRY
Assertion: The two strands of DNA are co...

Assertion: The two strands of DNA are complementary to each other
Reason: Adenine specifically forms hydrogen bonds with guanine whereas cytosine forms hydrogen bonds with thymine.

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:
C
Adenine forms hydrogen bonds with thymine whereas cytosine forms hydrogen bonds with guanine . Due to specific pairing of bases the two strands are complementary.
Promotional Banner

Topper's Solved these Questions

  • BIOMOLECULES

    NCERT FINGERTIPS ENGLISH|Exercise Carbohydrates|35 Videos

  • BIOMOLECULES

    NCERT FINGERTIPS ENGLISH|Exercise Proteins|30 Videos

  • BIOMOLECULES

    NCERT FINGERTIPS ENGLISH|Exercise EXEMPLER PROBLEMS|16 Videos

  • AMINES

    NCERT FINGERTIPS ENGLISH|Exercise ASSERTION & REASON CORNER|14 Videos

  • CHEMICAL KINETICS

    NCERT FINGERTIPS ENGLISH|Exercise Assertion And Reason|15 Videos

Similar Questions

Explore conceptually related problems

Thymine is held by two hydrogen bonds with the base :

Assertion: The two strands in double strand helix structure of DNA are complementary to each other Reason: Disulphide bonds are formed between SQPecific pairs of bases

The compound which can form intramolecular hydrogen bond is :

Which site of tRNA molecule forms hydrogen bonds with mRNA molecule?

The two strands of double helix of DNA are linked together by hydrogen bonds between :

In double helix model of DNA, the number of hydrogen bonds formed between guanine and cytosine is

alpha- helix of protein is formed by the bending of polypeptide chain to form hydrogen bonds in the same chain.

Assertion (A) Boiling points of alcohols are higher than ethers. Reason (R) They can form intermolecular hydrogen-bonding.

Assertion : The nearly tetrahedral arrangement of the orbitals about the oxygen atoms allows each water molecule to form hydrogen bonds with as many as four neighbouring water molecules. Reason : In ice each water molecules forms four hydrogen bonds as each molecules is fixed in the space.

Structures of molecules of two compounds are given below. a) Which of the two compounds will have intermolecular hydrogen bonding and which compound is expected to show intramolecular hydrogen bonding? b) The melting point of compound depends on, among other things, the extent of hydrogen bonding. On this basis explain which of the above two compounds will show higher melting point? c) Solubility of compounds in water depends on powers to form hydrogen bonds with water. Which of the above compounds will form hydrogen bond with easily and be more stable in it?