Biomolecules  MCQs

MCQs of Biomolecules

Showing 41 to 50 out of 161 Questions
2 3 4 5 6 7
41.
With what reagent glucose gives gluconic acid ?
(a) Bromine water
(b) Ammoniacal AgNO3
(c) Fehling solution
(d) All of the above
Answer:

Option (d)

42.
What is the type of reaction taking place by ammoniacal AgNO3 with glucose ?
(a) Redox
(b) Only oxidation
(c) Only reduction
(d) Neutralization
Answer:

Option (a)

43.
Which reaction (s) play an important role in the determination of presence of - CHO group in glucose ?
(a) Tollen's test
(b) Fehling's test
(c) Mild oxidation with Br2 water
(d) All of the above
Answer:

Option (d)

44.
Which of the following dicarboxylic acid is obtained on oxidation of glucose by strong oxidizing agent HNO3 ?
(a) Gluconic acid
(b) Malonic acid
(c) Saccharic acid
(d) Oxalic acid
Answer:

Option (a)

45.
In the presence of which reagent does glucose reacts with (CH3CO)2O to give pentaacetyl glucose by acetylation reaction ?
(a) Pyridine
(b) Anhydrous AICI3
(c) Pyrine
(d) All of the above
Answer:

Option (a)

46.
How many secondary carbon atoms are there in the structure of glucose ?
(a) 6
(b) 4
(c) 5
(d) 3
Answer:

Option (b)

47.
Glucose forms osazone with X-molecules of phenyl hydrazine. Mention value of X .
(a) 2
(b) 1
(c) 4
(d) 3
Answer:

Option (d)

48.
Give name of the scientist who determined the configuration of glucose.
(a) H.C. Crick
(b) Emil Fischer
(c) Ingold
(d) J.D. Watson
Answer:

Option (b)

49.
If the - OH group is attached to the bottom most chiral carbon atom on the right side, the compound possesses_____ configuration.
(a) d
(b) D
(c) l
(d) L
Answer:

Option (b)

50.
State the name of instrument used for the measurement of optical activity.
(a) Spectrophotometer
(b) Electron microscope
(c) Polarimeter
(d) Potentiometer
Answer:

Option (c)

Showing 41 to 50 out of 161 Questions
2 3 4 5 6 7