which of the following statements is are true i all amino

Which of the following statement$$(s)$$ is (are) true ?
(i) All amino acids contain one chiral center.
(ii) Some amino acids contain one, while some contain more chiral center or even no chiral center.
(iii) All amino acids found in proteins have $$L$$ configuration.
(iv) All amino acids found in proteins have $${1^ \circ }$$ amino group.

A. (ii), (iii) & (iv)

B. (ii) & (iii)

C. (i), (iii) & (iv)

D. (i) & (iv).

Answer : (ii) & (iii)

Solution :
Although $$D$$ - alanine is a constituent of a bacterial cell walls, it is not found in proteins.

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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

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Releted Question 3

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

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Releted Question 4

The following carbohydrate is

A. a ketohexose

B. an aldohexose

C. an $$\alpha $$ - furanose

D. an $$\alpha $$ - pyranose

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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

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