Question

The predominant form of histamine present in human blood is $$\left( {p{K_a},\,{\text{Histidine}} - 6.0} \right)$$

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B. Biomolecules mcq option image
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D. Biomolecules mcq option image  
Answer :   Biomolecules mcq option image
Solution :
siucture of histamine
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Blood is slightly basic in nature $$\left( {7.35\,pH} \right).$$   At this $$pH,$$ terminal $$N{H_2}$$  will get protonated due to more basic nature.
∴ Predominant structure of histamine is
Biomolecules mcq solution image

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
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
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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B. Biomolecules mcq option image
C. Biomolecules mcq option image
D. Biomolecules mcq option image
Releted Question 4

The following carbohydrate is
Biomolecules mcq question image

A. a ketohexose
B. an aldohexose
C. an $$\alpha $$ - furanose
D. an $$\alpha $$ - pyranose

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