Biomolecules  MCQs

MCQs of Biomolecules

Showing 31 to 40 out of 161 Questions
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31.
Five carbon atoms and one oxygen atom containing six membered cyclic compound is mentioned by _____ word.
(a) pyranose
(b) furanose
(c) thiophenose
(d) pyrimidose
Answer:

Option (a)

32.
Mention the number of π-bonds present in pyran ?
(a) 2
(b) 3
(c) 4
(d) 5
Answer:

Option (a)

33.
From what from the following is glucose obtained ?
(a) Ripe Fruits
(b) Honey
(c) Starch
(d) All of the above
Answer:

Option (d)

34.
State percentage proportion of glucose in grapes.
(a) 10-15%
(b) 20-25%
(c) 2-5%
(d) 80-85%
Answer:

Option (b)

35.
C12H22O11 + H2O → C6H12O6 + C6H12O6 . In this reaction what should be the value of pH ?
(a) < 7
(b) > 7
(c) = 7
(d) ≥ 10
Answer:

Option (a)

36.
What is improper in the extraction of glucose industrially ?
(a) Cellulose is used as a reagent.
(b) Dilute NaOH is used as a catalyst.
(c) 593 K temperature, 2000 bar pressure
(d) All of the above
Answer:

Option (d)

37.
Mention proportion of C : H : O in empirical formula of glucose ?
(a) 1 : 2 : 3
(b) 2 : 1 : 1
(c) 1 : 2 : 1
(d) 3 : 2 : 1
Answer:

Option (c)

38.
Glucose →∆HI n -hexane. This reaction indicates _____ atoms of glucose are linked in linear chain.
(a) 2
(b) 6
(c) 4
(d) 12
Answer:

Option (b)

39.
The reactions of glucose with HCN and NH2OH suggest that _____ group is definitely present in glucose molecule.
(a) C/\ = O
(b) -OH
(c) -NH2
(d) -O-
Answer:

Option (a)

40.
Mention the type of reaction occurring by HCN with glucose.
(a) Addition
(b) Substitution
(c) Elimination
(d) Rearrangement
Answer:

Option (a)

Showing 31 to 40 out of 161 Questions
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