which of the following is correct about h bonding in

Which of the following is correct about $$H$$ - bonding in nucleotide?

A. $$A - T,\,G - C$$

B. $$A - G,\,T - C$$

C. $$G - T,\,A - C$$

D. $$A - A,\,T - T$$

Answer : $$A - T,\,G - C$$

Solution :
The structure of $$DNA$$ molecule is a double helical structure. In this structure double helix are made up of two right handed helical polynucleotide chains which are held together by $$H$$ - bonds. In these helixes the adenine $$(A)$$ base is linked with thymine $$(T)$$ by two $$H$$ - bonds and guanine $$(G)$$ is linked with cytocine $$(C)$$ by three $$H$$ - bonds as $$A = T,$$ and $$G \equiv C.$$

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

View Answer

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

Which of the following is correct about $$H$$ - bonding in nucleotide?

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

Practice More MCQ Question on Chemistry Section

Which of the following is correct about $$H$$ - bonding in nucleotide?

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

Practice More Releted MCQ Question on Biomolecules

Practice More MCQ Question on Chemistry Section

Releted MCQ Question on
Organic Chemistry >> Biomolecules

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Biomolecules