Biomolecules  MCQs

MCQs of Biomolecules

Showing 81 to 90 out of 161 Questions
6 7 8 9 10 11
81.
How many moles of phenyl hydrazine are reacted with one mole of glucose to get one mole of glucosazone ?
(a) 1 mole
(b) 2 mole
(c) 3 mole
(d) 4 mole
Answer:

Option (c)

82.
How many primary and secondary alcoholic groups are there in a linear structure of glucose ?
(a) 4 and 1
(b) 1 and 4
(c) 2 and 4
(d) 0 and 4
Answer:

Option (b)

83.
How many optical isomers are formed by glucose ?
(a) 4
(b) 9
(c) 16
(d) 2
Answer:

Option (c)

84.
Because of which phenomenon

C1

of glucose becomes anomeric carbon ?
(a) Cyclization
(b) Isomerization
(c) Crystallization
(d) Mutarotation
Answer:

Option (a)

85.
50 : 50 Mixture of what is known as invert sugar ?
(a) D-glucose + D-fructose
(b) L-glucose + L-fructose
(c) D-glucose + D-galactose
(d) D-glucose + L-fructose
Answer:

Option (a)

86.
Which disaccharide gives two molecules of glucose on hydrolysis ?
(a) Sucrose
(b) Maltose
(c) Lactose
(d) cellobiose
Answer:

Option (b)

87.
Which compound gives glucose and galactose on hydrolysis ?
(a) Milk sugar
(b) Malt sugar
(c) Cane sugar
(d) Table sugar
Answer:

Option (a)

88.
What is invert sugar ?
(a) Mixture of sucrose
(b) Mixture of glucose and galactose
(c) Mixture of glucose and lactose
(d) Mixture of D-glucose and D-fructose in 1 : 1 proportion
Answer:

Option (d)

89.
Which of the following does not show Mutarotation ?
(a) Lactose
(b) Sucrose
(c) Fructose
(d) Maltose
Answer:

Option (b)

90.
The value of specific rotation of sucrose after hydrolysis is -20º.This negative sign of invert sugar is due to_____.
(a) glucose
(b) galactose
(c) fructose
(d) All of the above
Answer:

Option (c)

Showing 81 to 90 out of 161 Questions
6 7 8 9 10 11