BSEB 12th Chemistry Exam VVI Objective MCQ Question Biomolecules Chapter
14. BIOMOLECULES
1. The carbohydrate which cannot be hydrolysed further is :
(A) Di-saccharide
(B) Mono-saccharide
(C) Oligo-saccharide
(D) None of these
| Answer :- (B) |
2. Glucose is a :
(A) Mono-saccharide
(B) Di-saccharide
(C) Oligo-saccharide
(D) None of these
| Answer :- (A) |
3. During acetylation of glucose it needs x moles of acetic anhydride. The value of x would be :
(A) 3
(B) 5
(C) 4
(D) 1
| Answer :- (B) |
4. On oxidation with a mild oxidising agent like Br2/H2O, the glucose is oxidized to :
(A) saccharic acid
(B) glucaric acid
(C) gluconic acid
(D) valeric acid
| Answer :- (C) |
5. Invert sugar is
(A) a type of cane sugar
(B) optically inactive form of sugar
(C) mixture of glucose and galactose
(D) mixture of glucose and fructose in equimolar quantities
| Answer :- (D) |
6. Which of the following compounds is found abundantly in nature ?
(A) Fructose
(B) Starch
(C) Glucose
(D) Cellulose
| Answer :- (D) |
7. Starch is composed of two polysaccharides which are :
(A) amylopectin and glycogen
(B) amylose and glycogen
(C) amylose (20%) and amylopectin (80%)
(D) cellulose and glycogen
| Answer :- (C) |
8. Which reagent is used to convert glucoseinto saccharic acid ?
(A) Br2/H2O
(B) Nitric acid
(C) Alkaline solution of iodine
(D) Ammonium hydroxide
| Answer :- (B) |
9. What is the basic formula for starch?
(A) (C6H12O)n
(B) (C6H12O5)n
(C) C12H22O11
(D) (C6H12O4)n
| Answer :- (B) |
10. The general formula of carbohydrates is
(A) CnH2n+1O
(B) CnH2nO
(C) Cx(H2O)y
( D) Cn(H2O)2n
| Answer :- (C) |
11. What are the hydrolysis products of sucrose ?
(A) Fructose + Fructose
(B) Glucose + Glucose
(C) Glucose + Galactose
(D) D-Glucose + D-Fructose
| Answer :- (D) |
12. Carbohydrates are stored in human body as the polysaccharide :
(A) starch
(B) glycogen
(C) cellulose
(D) amylose
| Answer :- (B) |
13. In nucleic acids, the sequence is :
(A) base – phosphate – sugar
(B) base – sugar – phosphate
(C) sugar – base – phosphate
(D) phosphate – base – sugar
| Answer :- (B) |
14. The conversion of maltose into glucose is possible by the enzyme :
(A) zymase
(B) lactase
(C) maltase
(D) diastase
| Answer :- (C) |
15. Which of the following is a non-reducing sugar?
(A) Glucose
(B) Sucrose
(C) Maltose
(D) Lactose
| Answer :- (B) |
16. Globular proteins are present in
(A) blood
(B) eggs
(C) milk
(D) all of these
| Answer :- (D) |
17. Which one of the amino acids can be synthesised in the body?
(A) Alanine
(B) Lysine
(C) Valine
(D) Histidine
| Answer :- (A) |
18. Formula of sucrose is :
(A) C12H22O12
(B) C12H22O11
(C) C12H24O11
(D) C12H22O10
| Answer :- (B) |
19. Carbohydrate which yield three to ten mono saccharide units on hydrolysis is called :
(A) Monosaccharide
(B) Disaccharide
(C) Oligosaccharide
(D) Polysaccharide
| Answer :- (C) |
20. Proteins are condensation polymers of :
(A) α-amino acids
(B) β-amino acids
(C) α-hydroxy acids
(D) β-hydroxy acids
| Answer :- (A) |
21. Keratin, a structural protein is present in :
(A) hair
(B) wool
(C) silk
(D) all of these
| Answer :- (D) |
22. Which of the following is basic amino acid ?
(A) Lysine
(B) Proline
(C) Alanine
(D) Aspartic acid
| Answer :- (A) |
23. The α-amino acid which contains the aromatic side chain is :
(A) proline
(B) tyrosine
(C) valine
(D) serine
| Answer :- (B) |
24. The number of amino acids found in proteins that a human body can synthesise is :
(A) 20
(B) 25
(C) 10
(D) 100
| Answer :- (A) |
25. Which of the following diseases is caused by deficiency of an enzyme ?
(A) Phenylketone urea
(B) Cheilosis
(C) Scurvy
(D) Xerophthalmia
| Answer :- (A) |
26. Enzymes are made up of :
(A) edible proteins
(B) Proteins with specific structure
(C) nitrogen containing carbohydrates
(D) carbohydrates
| Answer :- (B) |
27. Vitamin A is present in :
(A) fish liver oil
(B) milk
(C) butter
(D) all of these
| Answer :- (D) |
28. Which of the following vitamins is water soluble ?
(A) Vitamin E
(B) Vitamin D
(C) Riboflavin
(D) Retinol
| Answer :- (C) |
29. Which is a fat soluble vitamin?
(A) Vitamin A
(B) Vitamin B6
(C) vitamin C
(D) Vitamin B2
| Answer :- (A) |
30. Vegetable oils like wheat germ oil, sunflower oil, etc are the good source of:
(A) Vitamin K
(B) Vitamin E
(C) Vitamin D
(D) Vitamin A
| Answer :- (B) |
31. Deficiency of vitamin E causes :
(A) rickets
(B) scurvy
(C) muscular weakness
(D) beri beri
| Answer :- (C) |
32. DNA and RNA contain four bases each. Which of the following bases is not present in RNA ?
(A) Adenine
(B) Uracil
(C) Thymine
(D) Cytosine
| Answer :- (C) |
33. Which of the following B-group vitamins can be stored in our body?
(A) Vitamin B1
(B) Vitamin B2
(C) Vitamin B6
(D) Vitamin B12
| Answer :- (D) |
34. Which of the following bases is not present in DNA ?
(A) Adenine
(B) Thymine
(C) Cytosine
(D) Uracil
| Answer :- (D) |
35. Which of the following is mono-saccharide ?
(A) Sucrose
(B) Maltose
(C) Lactose
(D) Fructose
| Answer :- (D) |
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