MCQs of Biomolecules

Biomolecules MCQs

MCQs of Biomolecules

Showing 71 to 80 out of 161 Questions

71.

How many configuration are exhibited by glucose ?

(a)	2
(b)	3
(c)	4
(d)	1

72.

Which scientist (S) have suggested that glucose should not be an open chain but it is a cyclic form ?

(a)	Fischer
(b)	Tollens
(c)	Tanret
(d)	All of the above

73.

How many chiral carbons are there in β - D - (+) - glucose ?

(a)	5
(b)	6
(c)	3
(d)	4

74.

The carbon of cyclic structure which is carbonyl carbon in open chain structure is called _____.

(a)	enantiomeric carbon
(b)	metameric carbon
(c)	anomeric carbon
(d)	isomeric carbon

75.

In which projection atoms or group is mentioned below which is indicated on the right side in Fischer projection ?

(a)	Tollen's projection
(b)	Tanret projection
(c)	Haworth projection
(d)	Vant hoff projection

76.

The specific rotation

[α]_{λ}^{T}

of freshly prepared solution of

α - D - (+) -

glucose is_____

(a)	$+ 19 °$
(b)	$+ 112 °$
(c)	$+ 36 °$
(d)	$+ 66 \cdot 5 °$

77.

The specific rotation of freshly prepared solution is +112° which _____ after some time.

(a)	increases to +116°
(b)	decreases to +19°
(c)	decreases to +52·5°
(d)	No remains same

78.

If the solution of glucose shows a specific rotation of +52·5°, then what will be percentage proportion of α-D-(+)-glucose and β-D-(+)-glucose in it ?

(a)	36%, 64%
(b)	50%, 50%
(c)	40%, 60%
(d)	34%, 66%

79.

How many chiral carbon atoms are present in glucose and fructose respectively ?

(a)	3, 3
(b)	4, 4
(c)	3, 4
(d)	4, 3

80.

Which product is obtained when glucose is reacted with excess of phenyl hydrazine ?

(a)	Glucose phenylhydrazone
(b)	Glucosazone
(c)	Glucose oxime
(d)	n -hexane

Showing 71 to 80 out of 161 Questions