Chapter 14 Biomolecules MCQs
Q 41.: What is the linkage present between monomer units of Cellulose ?
(A) C1β– C4 glycosidic bond
(B) C1α – C6 glycosidic bond
(C) C1α – C4 glycosidic bond
(D) C2β – C1α glycosidic bond
Option – A
Q 42.: Find out which one is non-reducing sugar
(A) Sucrose
(B) Lactose
(C) Maltose
(D) Ribose
Option – A
Q 43.: Which statement is False ?
(A) All monosaccharides and oligosaccharides are sugars.
(B) All polysaccharides are non-reducing.
(C) All oligosachharides are reducing.
(D) All monosaccharides are reducing.
Option – C
Q 44.: What is the linkage present between two monomer units of Lactose ?
(A) C1α – C6 glycosidic bond
(B) C1β– C4 glycosidic bond
(C) C1α – C4 glycosidic bond
(D) C2β – C1α glycosidic bond
Option – B
Q 45.: Which of the following disaccharide give a ketose and an aldose upon hydrolysis ?
(A) Lactose
(B) Sucrose
(C) Maltose
(D) All of These
Option – B
Q 46.: Which is not a source of dextrose ?
(A) Sucrose
(B) Maltose
(C) Cellulose
(D) Ribose
Option – D
Q 47.: Which of the followings cannot form an oxime on reaction with hydroxyl amine ?
(A) Glucose
(B) Glucose pentaacetate
(C) Acetaldehyde
(D) Acetone
Option – B
Q 48.: What is the optical rotation of equilibrium mixture of α-D-glucose and β-D-glucose after mutarotation ?
(A) +111
(B) +19.2
(C) +52.5
(D) +54.2
Option – C
Q 49.: What is the linkage present between two monomer units of Maltose ?
(A) C1β– C4 glycosidic bond
(B) C1α – C6 glycosidic bond
(C) C2β – C1α glycosidic bond
(D) C1α – C4 glycosidic bond
Option – D
Q 50.: The number of chiral carbon in β-D-glucose is
(A) Five
(B) Four
(C) Six
(D) Three
Option – B
Q 51.: Inverted sugar is a title given to ________
Glucose
Maltose
Sucrose
Lactose
Option – C
Q 52.: What is the linkage present between two monomer units of Sucrose ?
(A) C2β – C1α glycosidic bond
(B) C1α – C4 glycosidic bond
(C) C1α – C6 glycosidic bond
(D) C1β– C4 glycosidic bond
Option – A
Q 53.: Which carbohydrate give deep blue colour with iodine and potassium iodide solution ?
(A) Sucrose
(B) Glycogen
(C) Cellulose
(D) Starch
Option – D
Q 54.: Which of the following has highly branched structure ?
(A) Glycogen
(B) Starch
(C) Cellulose
(D) Sucrose
Option – A
Q 55.: Which of the following has linear structure ?
(A) Glycogen
(B) Starch
(C) Cellulose
(D) Sucrose
Option – C
Q 56.: The only monosaccharide which has both pyranose and furanose structure is ____
(A) Glucose
(B) Ribose
(C) Glactose
(D) Fructose
Option – D
Q 57.: What is the linkage present between monomer units of Starch ?
(A) C1β– C4 glycosidic bond
(B) C1α – C6 glycosidic bond
(C) C1α – C4 glycosidic bond
(D) Both 2 and 3
Option – D
Q 58.: The monosaccharide which has only open structure not cyclic ______
(A) Dihydroxy acetone
(B) Glyceraldehyde
(C) Both ‘A’ and ‘B’
(D) Mannose
Option – C
Q 59.: How many stereoisomers of glucose are possible ?
(A) 32
(B) 16
(C) 12
(D) 08
Option – B
Q 60.: Anomers are not formed by _________
(A) Dihydroxy acetone
(B) Glucose
(C) Ribose
(D) Fructose
Option – A
Q 61.: Sucrose on treatment with conc. HCl produce :
(A) Glucose
(B) Fructose
(C) Glucose + Fructose
(D) Laevunilic acid
Option – D
Q 62.: Maltose on hydrolysis produces :
(A) Glucose
(B) Fructose
(C) Mannose
(D) Galactose
Option – A
Q 63.: The carbohydrate which is an essential constituent of plant cell is :
(A) Sucrose
(B) Starch
(C) Cellulose
(D) Vitamins
Option – C
Q 64.: Which of the following reaction establishes difference between glucose and fructose ?
(A) Tollen’s reagent reaction
(B) Phenyl hydrazine
(C) P/HI
(D) Conc. HNO3
Option – D
Q 65.: A certain compound gives negative test with ninhydrin and positive test with Benedict’s solution, it is
(A) Amino acid
(B) Monosaccharide
(C) Lipid
(D) Protein
Option – B
Q 66.: Glucose and mannose are
(A) Anomers
(B) Epimers
(C) Ketohexoses
(D) Disaccharides
Option – B
Q 67.: Iodine value is related to
(A) Fats and oils
(B) Alcohols
(C) Ethers
(D) Esters
Option – A
Q 68.: Which one of the following statements is not true regarding (+) lactose
(A) (+)-lactose contains 8-OH groups
(B) On hydrolysis (+)-lactose gives equal amount of D-(+)-glucose and D-(+)-galactose
(C) (+)-lactose is a β-glycoside formed by the union of molecule of D-(+)-glucose and a molecule of D-(+)-galactose
(D) (+)- lactose is reducing sugar and does not exhibit mutarotation.
Option – D
Q 69.: What is the nature of glucose-glucose linkage in starch that makes its so susceptible to acid hydrolysis ?
(A) Starch is hemiacetal
(B) Starch is a acetal
(C) Starch is polymers
(D) Starch contains only few molecules of glucose.
Option – B
Q 70.: How glucose is related with fructose ?
(A) Functional group isomerism
(B) Rotamers
(C) Position isomerism
(D) Geometrical isomerism
Option – A
Q 71.: How can you say that glucose is cyclic compound ?
(A) Glucose undergoes Tollen’s reaction
(B) Glucose reacts with phenyl hydrazine
(C) Glucose fails to react with sodium hydrogen sulfite
(D) Glucose reacts with nitric acid.
Option – C
Q 72.: Which of the following does not exhibit the phenomenon of mutarotation ?
(A) (−)-Fructose
(B) (+)-Lactose
(C) (+)-Sucrose
(D) (+)-Maltose
Option – C
Q 73.: Hydrolysis of sugar is called _______
(A) Inversion
(B) Esterification
(C) Hydration
(D) Saponification
Option – A
Q 74.: The change in optical rotation of freshly prepared solution of grapes sugar with time is known as
(A) Specific rotation
(B) Mutarotation
(C) Inversion
(D) Rotary motion
Option – B
Q 75.: Glucose reacts with ‘X‘ number of molecules of phenyl hydrazine to yield osazone. The value of ‘X‘ is :
(A) One
(B) Two
(C) Three
(D) Four
Option – C
Q 76.: Glucose on reaction with Fehling solution gives :
(A) Cupric oxide
(B) Cuprous oxide
(C) Saccharic acid
(D) Both ‘A’ and ‘B’
Option – B
Q 77.: Which of the following is trisaccharide ?
(A) Stachyose
(B) Sucrose
(C) Maltose
(D) Raffinose
Option – D
Q 78.: When sucrose is heated with concentrated nitric acid the product formed is :
(A) Sucrose nitrate
(B) Adipic acid
(C) Oxalic acid
(D) Citric acid
Option – C
Q 79.: Glucose forms many derivatives. The derivative which will help to prove the furanose structure is :
(A) Osazone
(B) Benzoyl
(C) Acetyl
(D) Isopropylidene
Option – D
Q 80.: Carbohydrate is treated with α−naphthol and concentrated sulphuric acid, colour developed at the junction of the two liquid is
(A) Violet
(B) Blue
(C) Green
(D) Red
Option – A