the reason for double helical structure of dna is operation

The reason for double helical structure of $$DNA$$ is operation of

A. dipole - dipole interaction

B. hydrogen bonding

C. electrostatic attractions

D. van der Waals’ forces

Answer : hydrogen bonding

Solution :
$$DNA$$ consists of two polynucleotide chains, each chain forms a right handed spiral with ten bases in one turn of the spiral. The two chains coil to double helix and run in opposite direction held together by hydrogen bonding.
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Releted MCQ Question on
Organic Chemistry >> Biomolecules

Releted Question 1

The pair of compounds in which both the compounds give positive test with Tollen’s reagent is

A. Glucose and Sucrose

B. Fructose and Sucrose

C. Acetophenone and Hexanal

D. Glucose and Fructose

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Releted Question 2

The two forms of $$D - $$ glucopyranose obtained from the solution of $$D - $$ glucose are called

A. Isomers

B. Anomers

C. Epimers

D. Enantiomers

View Answer

Releted Question 3

Cellulose upon acetylation with excess acetic anhydride/ $${H_2}S{O_4}$$ (catalytic) gives cellulose triacetate whose structure is

View Answer

Releted Question 4

The following carbohydrate is

A. a ketohexose

B. an aldohexose

C. an $$\alpha $$ - furanose

D. an $$\alpha $$ - pyranose

View Answer

The reason for double helical structure of $$DNA$$ is operation of

Releted MCQ Question on
Organic Chemistry >> Biomolecules

The pair of compounds in which both the compounds give positive test with Tollen’s reagent is

The two forms of $$D - $$ glucopyranose obtained from the solution of $$D - $$ glucose are called

Cellulose upon acetylation with excess acetic anhydride/ $${H_2}S{O_4}$$ (catalytic) gives cellulose triacetate whose structure is

The following carbohydrate is

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Biomolecules

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The reason for double helical structure of $$DNA$$ is operation of

Releted MCQ Question on Organic Chemistry >> Biomolecules

The pair of compounds in which both the compounds give positive test with Tollen’s reagent is

The two forms of $$D - $$ glucopyranose obtained from the solution of $$D - $$ glucose are called

Cellulose upon acetylation with excess acetic anhydride/ $${H_2}S{O_4}$$ (catalytic) gives cellulose triacetate whose structure is

The following carbohydrate is

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Releted MCQ Question on
Organic Chemistry >> Biomolecules

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Biomolecules