BIO MOLECULES – 5

1) Antibodies are produced by
a) WBC
b) RBC
c) Blood platelets
d) None of these

2) Lipases are enzymes that hydrolyse
a) Carbohydrates
b) Fats
c) Proteins
d) Thymine

3) Coenzymes are derived from
a) Vitamins
b) Hormones
c) Lipids
d) Carbohydrates

4) @ Fructose reacts with methanol in presence of dry HCl gas to give
a)

a – methyl glucoside
b)

b – methyl glucoside
c)

g – methyl glucoside
d)

a – methyl glucoside and b – methyl glucoside

5) Monosaccharides usually contain
a) 3 to 8 carbon atoms
b) 4 to 8 carbon atoms
c) 6 to 10 carbon atoms
d) 8 to 10 carbon atoms

6) Fructose is —— sweet than glucose
a) More
b) Less
c) Equally
d) None of these

7) Glucose gives the silver mirror test with ammonical AgNO3, because it contains a
a)

– CHO group
b)

C = O group
c)

– NH2 group
d) None of these

8) The number of possible isomers of glucose are
a) 4
b) 14
c) 16
d) 24

9) Carbohydrates are sweet because they have
a) Hydrogen bonding
b) Covalent bonding
c) Electrovalent bonding
d) None of these

10) The reagent which forms crystalline osazone derivatives when reacted with glucose is
a) Fehling solution
b) Phenyl hydrazine
c) Benedict solution
d) None of these

11) Reactions with sugars are carried out in neutral or acidic medium and not in alkaline medium, because in an alkaline medium sugars undergo
a) Hydrogenation
b) Decomposition
c) Inversion
d) Rearrangement

12) The charred product when C6H12O6 is heated with conc. H2SO4 is due to
a) Oxidation
b) Reduction
c) Dehydration
d) None of these

13) @

a – and b – glucose differ in the orientation of -OH group around
a)

C3
b)

C4
c)

C5
d)

C2

14) The sugar present in honey is
a) Maltose
b) Glucose
c) Fructose
d) Sucrose

15) The reaction of glucose with nitro methane is called
a) Hundsiecker reaction
b) Perkin’s reaction
c) Gattermann’s reaction
d) Nef reaction

16) The chief yellow colouring material of carrots is
a) Carotene
b) Carmine
c) Casein
d) Carbo waxes


Answer :

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