In This Post we are  providing Chapter-14 Biomolecules  NCERT MCQ for Class 12 Chemistry which will be beneficial for students. These solutions are updated according to 2021-22 syllabus. These MCQS  can be really helpful in the preparation of Board exams and will provide you with a brief knowledge of the chapter.

NCERT MCQ ON BIOMOLECULES

Question 1 : Which of the following gives positive Fehling solution test?

(a) Protein  (b) Sucrose
(c) Glucose (d) Fats

Answer : C

Question 2: Which of the following statements is incorrect regarding glucose?

(a) It is an aldohexose.
(b) It is also known as dextrose
(c) It is monomer of cellulose.
(d) It is the least abundant organic compound on earth.

Answer : D 

Question 3 : Glucose gives silver mirror test with Tollen’s reagent. It shows the presence of

(a) acidic group   (b) alcoholic group
(c) ketonic group (d) aldehyde group

Answer : D  

Question 4: The symbols D and L represents

(a) the optical activity of compounds.
(b) the relative configuration of a particular stereoisomer.
(c) the dextrorotatory nature of molecule.
(d) the levorotatory nature of molecule

Answer : B 

Question 5:   The function of glucose is to

(a) provides energy  (b) promote growth
(c) prevent diseases (d) perform all above

Answer : A

Question 6 : Which one of the following compounds is different from the rest?

(a) Sucrose (b) Maltose
(c) Lactose (d) Glucose

Answer : D 

Question 7 : The two functional groups present in a typical carbohydrate are:

(a) – CHO and – COOH   (b) > C = O and – OH
(c) – OH and – CHO       (d) – OH and – COOH

Answer : C 

Question 8: When glucose reacts with bromine water, the main product is

(a) gluconic acid   (b) glyceraldehyde
(c) saccharic acid (d) acetic acid

Answer : A 

Question 9: Glucose does not react with

(a) Br2/H2O (b) H2NOH
(c) HI         (d) NaHSO3

Answer : D 

Question 10: Biomolecules are

(a) aldehydes and ketones
(b) acids and esters
(c) carbohydrates, proteins and fats
(d) alcohols and phenols

Answer : C

Question 11 : Which of the following monosaccharide is pentose ?

(a) Glucose    (b) Fructose
(c) Arabinose (d) Galactose

Answer : C

Question 12: Which one of the following compounds is found abundantly in nature?

(a) Fructose (b) Starch
(c) Glucose  (d) Cellulose

Answer : D

Question 13: A carbohydrate that cannot be hydrolyzed into simpler units is called

(a) polysaccharides (b) trisaccharide
(c) disaccharides    (d) monosaccharides

Answer : D

Question 14 : Which of the following statements is incorrect ?

(a) Maltose gives two molecules of glucose only.
(b) Cellulose and sucrose are polysaccharide.
(c) Polysaccharides are not sweet in taste.
(d) Polysaccharides are also known as non-sugars

Answer : B

Question 15 : Reducing sugars reduce.

(a) only Fehling’s solution
(b) only Tollen’s solution.
(c) both (a) & (b)
(d) neither (a) nor (b)

Answer : C

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