chapter1o

Biomolecules
Scan and take
Chapter Test

TOPIC1
NCERT
introduction &Carbohydrates Pg 281-29O.

Name any three complex biomolecules present in living organisms.

) (1). (iüi)
9 Initially the general formula of carbohydrate was considered as
3. Carbohydrates are optically active polyhydroxy aldehydes or ketones.
True False

4. Classify the following into monosaccharides, oligosaccharides and polysaccharides.

Glucose, Fructose, Sucrose, Starch, Cellulose, Maltose, Glycogen

nature?
5. Which of the following polysaccharide is found most abundantly in
(a) Fructose () Cellulose (c) Glucose (a) Lactose

non-sugars.
6. Polysaccharides are not sweet in taste, hence they are also called as
True False

7. Complete the following reaction,

Sucrose Hydrolysis A B
B=

8. Complete the following analogy,

Plants : Starch:: Animals : X
X=

Concepts of all questions bearing * are important for JEENEETYCUET,

200 NCERT REVISION WORKBOOK Chemistry Class X

9. Consider the following statements.

Tollen's reagent are referred as
I. Carbohydrates which reduce Fehling's solution and
reducing sugars.
II. Glucose is a ketohexose carbohydrate.
Which of the above statement(s) is/are correct?
(a) Only I b) Only I
(c) Both I and II |(d) Neither I nor II

10. On hydrolysis of starch by boiling it with dilute H,SO4, X is obtained. X is the moes
abundant organic compound on earth. Identify X
X=

11. Write the product formed when glucose reacts with

(i) hydrogen iodide ai elevated temperatures
(i) hydroxylamine.
(ii) HCN
12. Which of the following reactions indicates the presence of five -OH groups in glucose?
CHO COOH CHO CHO

Br water
(a) (CHOH), (CHOH), ) (CHOH), Acec (CH -0-CCH¡),
anhydride

CH,0H
CHO
CH,OH
COOH
CH,OH
CH,-0ccH;
Oxidation
(o) (CHOH)) On, (CHOH),d) All of these
CH,OH COOH

*13. Match the names of the following compounds in Column I with their respective structures in
Column II.
Column I Column II
(Names) Structures)
COOH
A. Glucose (ÇHOH),
COOH

CHO
B. Saccharic acid 2. (ÇHOH,
CH,OH
COOH
C. Gluconic acid 3 (CHOH),
CH,OH

A. B. C.
 201
Biomolecules

.. Pickthe non-reducing sugar from the following

disaccharides.
CH,OH CH,OH CH,OH
H H -0
H H HOH,C H
a)
H H
OH H
HO OH H OH H
OH HO H OH/ CH,OH
H OH OH
H OH
OH

CH,OH CH,OH CH,OH CH,OH

-0
HO H -O, H OH
OH
H H VH H
(c) OH H OH OH H
0.
OH H
H HO H H
H H

H OH H OH
H OH OH

46. On oxidation with nitric acid, glucose yield saccharic acid which indicates the presence of
secondary alcoholic (-OH) group in glucose.
True False

16. Glucose is correctly named as D-(+)-glucose, where 'D' represents X , whereas (+)
represents nature of molecule.
X=
Y=

17. From the following monosaccharides the number of aldoses is

Glucose, Fructose, Galactose, Ribose, Deoxyribose

(a) 2 6) 3
(c) 4
18. Consider the following statements.
I. The a-form of glucose is obtained by crystallisation from concentrated solution of glucose
at 303 K.
II. The B-form of glucose is obtained by crystallisation from hot and saturated aqueous
solution of glucose at 371 K.
Which of the following statements is/are correct?
(la) Only I ) Only II
(c) Both I and II | d ) Neither I nor II
202 NCERT REVISION WORKBOOK Chemistry Class

19. Select the compound(s) which have D-configuration.

CHO
CHO H OH
CH,OH CHO
C=0
HO H
H
I. H -OH II. III. HO IV. HO
H OH
H OH
H OH
H OH
CH,OH
(+) rotation
CH,OH
CH,OH
CH,0H
(- rotation
(+) rotation
(+) rotation

(a) Only I (b) Only II

(c) I, IIand III |(d) All of these
20. Which of these cyclic structures of monosaccharides are anomers?

H OH HO H HO H

H HÌ H
I. OH II H -OHI III.
HO HO H H

H OH OH HÌ H

H H H

CH,0H CH,OH CH,OH

(a) I and II (b) IIand III

(c) I and III (d) IIis anomer of I and II

*21. Which one of the following reactions is not explained by the open chain structure of
glucose ?
(a) Formation of penta-acetate of glucose with acetic anhydride.
(b) Formation of addition product with 2,4-DNP reagent.
(c) Silver mirror formation with Tollen's reagent.
(d) Existence of alpha and beta forms of glucose.
22. Which of the following statement(s) is/are not correct regarding fructose?
I. It is a laevorotatory compound.
II. Itcontains ketonic functional group at carbon number 2.
III. It isobtained by hydrolysis of glucose.
Mark (v)and (*) under correct and incorrect with respect to given statements.
Correct Incorrect

II.
II.

23. Complete the following analogy.

Pyranose structure :Pyran :: X:Furan
X
chapter 10 Biomolecules 203

24. State whether True or False.

Furan is a five membered cyclic compound with one oxygen and four carbon atoms.
True False

s Choose the correct structure of ß-D-(-fructofuranose.

HOH,C
CH,OH
OH
H -0 OH
(a) H (b)
H
H OH CH,0H OH H
HO H

OH H H OH

HOH,C CH,OH
CH,OH
-0. H
H
H
H OH OH (a) OH H
HO OH
OH H OH
H

26. Mention the linkage between two monosaccharide units through oxygen atom to form a
disaccharide.

27. Pick the odd one out from the following in context of non-reducing sugar.
Sucrose, Maltose, Lactose, Cellobiose

28. Identify the products X and Y.

C,H,,0, +H,0X+Y
X= Y=

29. Complete the following statement.

In sucrose, the two monosaccharide units are held together by A linkage between
C, of. B and C, of
A= B= C=
204 NCERT REVISION WORKBOOK Chemistry Clas

30. Consider the following statements.

I. Sucrose is dextrorotatory and after hydrolysis, it gives dextrorotatory glucose and
dextrorotatory fructose.
[I. Hydrolysis of sucrose results to change in the sign of rotation therefore it is als0 known as
invert sugar.
Which of the following statement(s) is/are correct regarding sucrose ?
(a) Only I (6) Only II
(c) Both I and II (d) None of these

31, Which one of the following statement is correct about sucrose?

(a) It can reduce Tollen's reagent, however cannot reduce Fehling's reagent.
(b) Itundergoes mutarotation like glucose and fructose.
(c) It undergoes inversion in the configuration on hydrolysis.
(d) It is laevorotatory in nature.

32. Monosaccharides combine/react to form disaccharides. Write the names of disaccharidet

formed by the following monosaccharides
() a-D-ghucose and a-D-glucose; Disaccharide
(ü) BD-galactose and ß-D-glucose;Disaccharide=
*33. Consider the following structure.
CH,OH CH,OH
HO H OH
H H
OH H OH H
H H H

H OH H OH
X

Lactose (milk sugar) is composed of X and Y. Identify X and Y.

X= Y=

34. Which of the following is the monomer unit of starch?

(a) B-glucose )agucose
(c) Bgalactose (d) a-fructose

35. Starch consist of two components Aand B, where Ais water soluble component, while Bis
water insoluble component and it constitutes about 80-85% of starch.
Identify A and B.
A B

36.
units.
(Amylose/Amylopectin) is a long branched polymer of a-D-glucose
chapter 10 Biomolecules 205

37. Write the names of the following.

() Polysaccharide which ispredominant constituent of the
cellwall of a plant cell.
i) Carbohydrate which is stored in animal body.
38. Cellulose is a polysaccharide composed of
(a) BD-galactose unit and B-D-glucose unit
(b) B-D glucose units which are joined together by glycosidic linkage between C, of one
glucose unit and C, of next glucose unit.
(c) PD-glucose units which are joined together by glycosidic linkage between C, of one
glucose unit and C, of next glucose unit.
(d) Both (a) and (c)
29. Fll in the blanks with the appropriate choice.
(E) is also known as animal starch. (Glycogen/Cellulose)
(ü) Glycogen is present in of animals. (muscles/kidneys)
40. Identify X from the given statement.
When body needs energy or when body is not getting glucose, then compound (X) breaks
dowa to release glucose into the bloodstream.
X=

41. Enist any three uses of carbohydrates in industries.

4)

(üi).
42. Mention the two aldopentoses which are present in nucleic acids.
(i)
43. Out of glycogen and cellulose, which one is
() found in yeast and fungi
(ii) found in cell wall of plant cells

TOPIC2
NCERT
Proteins Pg 290-295

44. Biomolecule present in milk, cheese, pulses, peanuts etc., are

(carbohydrates/protein).
45. On hydrolysis of proteins, the type of amino acids obtained are
(a) B-amino acids (b) a-amino acids
(c) y-amino acids (d) All of these
206 NCEAT AEVISION WORKBOOK Chemistry Class Y

46. Consider the following statements.

I. Depending on relative number of amino and carboxyl groups,amino acids are classified
as acidic, basic or neutral.
II. Amino acids which can be synthesised in the body are called essential amino acids.
Which of the above statement(s) is/are incorrect ?
(a) Only 1 (b) Only II
(c) BothI and II (c) Neither I nor II

47. Separate essential and non-essential amino acids from the following.
Glycine, Valine, Leucine, Glutamine, Tyrosine, Lysine, Tryptophan, Serine, Cysteine

48. The behaviour shown by amino acids in Zwitter ionic form is

(a) Acidic (b) Basic
(c) Neutral (a) Amphoteric
49. Pick the odd one out from the following with respect to optical activity.
Tyrosine, Lysine, Glycine, Valine, Serine

50. Consider the following reaction between two molecules of different amino acids.
H,N-CH,-COOH+ H,N-ÇH-COOH
CH,

H,N-CH,c0-NH CH-COOH
CH,

i) Here, X linkage is known as

(ii) The product formed is (tripeptide/ dipeptide).
51. Give the name of two amino acids which combines to form glycylalanine.
(i) (i)
52. Number of amino acids from the following which are acidic in nature,
Glycine, Aspartate, Glutamate, Valine, Isoleucine
(a) 1 (b) 2
(c) 3 (d) 4
 207
Chapter 10
Biomolecules

Check whether the given statement is correct or incorrect.

Insulin contains 21 amino acids.
True False

cA Classify the following into acidic, basic and neutral amino acids.
Arginine, Aspartic acid, Glycine, Glutaric acid

55. Tick the correct one.

() Keratin Fibrous proteins GIlobular proteins
(ü) Albumin Fibrous proteins Globular proteins
56. Give any two examples of fibrous proteins present in our body.
ii
57. Proteins are found to have two different types of secondary structures, i.e. a-helix and
Bpleated sheet structure, a-helix structure of protein is stabilised by
(a) van der Waals' forces ) Peptide bonds
(c) Dipole-dipole interaction Ua) Hydrogen bonds

58. Match the Column I(type of proteins) with Column II (types of bonding present).
Column I Column I
(Protein) (Bonding)
|A. Fibrous 1. Intemolecular H-bond

B. a-helix 2. Hydrogen and disulphide

|C. Bpleated 3 Intramolecular hydrogen bond

A. B.

59. Enlist the factors (forces) which stabilise the 2° and 3° structures of proteins.
() (i

(iü) (iv)
sequence.
60. Each polypeptide in a protein has amino acids linked with each other in a specific
the
Ihissequence of amino acids is said to be
(a) primary structure of protein ) secondary structure of protein
(c) tertiary structure of protein Ud) quaternary structure of protein

61. During denaturation, secondary and tertiary structures are destroyed but primary structure
remain intact.

True False
208 NCERT REVISION WORKBOOK Chemistry Class Y

62. Choose the factor which is not responsible for denaturation of proteins.
Change inpB, Temperature chonge, Orgonic solvents, Mass of protein.

*63. Which of the following statements about denaturation are correct?

I. Indenaturation, globules unfold in protein and helix get uncoiled. As the result the
protein loses its biological activity.
II. Denaturation affects primary structure which gets distorted.
II. Denaturation leads to conversion of double strand of DNA into single strand.
IV. Coagulation of egg white on boiling and curdling of milk are examples of denaturation of
proteins.
Mark () and (*) under correct and incorrect with respect to given statements.
Correct Incorrect
I.

III.
V.

64. Which of the following statement is corect?

a) Fibrousproteins are generally soluble in water.
(b) Albumin is an example of fibrous proteins.
(c) In fibrous proteins, the structure is stabilised by hydrogen bonds and
disulphide bonds.
(d) pH does not affect the primary structure of protein.

TOPIC3
NCERT
Enzymes Pg 295

65. The conversion of maltose into gucose is possible by enzyme

*66. Which of the fllowing statement regarding enzymes is incorrect?
(a) Enzymes are usually globalar proteins.
(b) Enzymes are biocatalyst.
(c) Enzymes are very specific for a particular reaction and particular substrate.
(d) Enzymes increases magnitude of activation energy.
67. Activation energy for acid hydrolysis of sucrose is 2.15 k] mol in the absence of enzyme.
True False
chapter 10 Biomolecules 209

*68. Choose the appropriate word from the following to complete the
sentences.
Activation energy, Sucrose, Glucose, Biocatalyst, Chemical
energu, Antioxidonts
Enzymes are A which reduces the
nagnitude of B C_ helps in acid
hvdrolysis of sucrose while maltase catalyses hydroiysis of
maltose into D
A= B=
C=. D=

TOPIC4
NCERT
Vitamins Pg 295-297

69. Name the following.

(i) Vitamin which is an acid
(ü) Vitamin which can be synthesised in human body.
70. Pick the odd one out on the basis of fat solubility.

Vitamin-D, Vitamin-A, Vitamin-E, Vitamin-K, Vitamin-C

71. Complete the following analogy.

Ascorbic acid : Vitamin C::Pyridoxine :X
X=

*72. Match the vitamins given in Column I with deficiency diseases given in Column II.
ColumnI Column I
(Vitamins) (Diseases)
A Vitamin-A 1 Scurvy
B Vitamin-B2 2 Xerophthalmia
C Vitamin-C Muscular weakness
D Vitamin-E Pernicious anaemia

A B

D.
73. Which of the following statement is incorrect?
(a) Deficiency of riboflavin causes cheilosis.
(b) Deficiency of vitamin-B, present in egg yolk can cause convulsion.
(c) Rickets and osteomalacia are disease caused by deficiency of vitamin K.
(d) Deficiency of vitamin-A can cause night blindness.
210 NCERT REVISION WORKBOOK Chemistry Class XI

74. Which of the following vitamin helps in blood clotting?

(a) Vitamin-A |(b) Vitamin-C
(c) Vitamin-D d) vitamin-K
75. Which of the following acids is a vitamin?
(a) Aspartic acid (b) Ascorbicacid

(c) Adipic acid (d) Saccharic acid

76. Number of vitamins from the following which are fat-soluble are
Retinol, Tocopherol, Ascorbic acid, Phyloquinone, Biotin, Cobalamin, Calciferol

(a) 2 6)3 (d) 5

TO PIC5
NCERT
Nucleic Acids Pg 297-300

77. Particles (threads) in nucleus of the cell, responsible for heredity are called A which are
made up of proteins andB. Write Aand B
A= B=

78. Consider the following statements.

L. The complete hydrolysis of DNA yields f-D-2- deoxyribose sugar, phosphoric acid and
sulphur contains heterocyliccompound called bases.
II, RNA contains four bases adenine, guanine, cytosine and uracil.
Which of the following statement(s) is/are correct?
(a) Only I (b) Only I
(c) Both Iand II (d) Neither I nor II

79. Tick the correct structure of pentose sugar present in DNA.

HOH,C OH HOH,C OH

HH H/H H H/H

OH OH OH H
(4) (B)

80. Nucleic acids are the polymers of_

(a) nucleosides (b) nucleotides
(c) bases d) sugars
Chapter Biomolecules 211

at. Name the linkage through which nucleotides are joined together
with 5 and 3carbon atoms
of pentose sugars.

92. When nucleoside is linked to phosphoric acid at 3-position of

nucleotide.
sugar moeity, it results in
True False

R3. Consider the following structure and answer the questions in

one or two words
J3

A=T
-T=A

C=G>
C=G
T=A
Structure of DNA

T=A
C=G
G=C

5/

() Who gave double helix structure of DNA?

(ü) The bond which holds two nucleic acid chains together is
84. Identify Xand complete the following analogy.
Adenine: Thymine : :Cytosine : X.
X=

85. Number of nitrogenous bases from the following which are purines.
Adenine, Guonine, Cytosine, Thynine, Uracil
(a) 2 )3
(c) 4

86. Enlist any four uses of DNA fingerprinting.

(ii)
(ii) (iv)
 NCERT REVISION
WORKBOOK Chemistry Class)
212

DNA.
the given choices with respect to RNA and
87. Select the correct one for
of self duplication. (RNA/DNA)
)Capable
(ii) Protein synthesis. (RNA/DNA)
protein. (RNA/DNA).
(i) Message for synthesis of a particular
nucleotide from the DNA containing
thymine is
88. Write the productsformed when a
hydrolysed.

TOPIC6
NCERT
Hormones Pg 300-301

bio-system.
89. Hormones are biocatalysts which speed up the reactions in
True False

90. Pick the odd one out.

Insulin, Epine phrine, Maltose, Thyroxine

91. Identify hormone X and Y.

released to increase
Xis released in response to rapid rise in blood sugar level, whereas Yis
the blood sugar level.
X=
92. Which hormone is an iodinated derivative of amino acid tyrosine?

(a) Thyroxine ) Epinephrine

(c) Glycogen (d) Insulin

93. Match the following hormones with the respective diseases.

ColumnI 0Oolumn I
(Hormone) (Disease)
A. Insulin 1. Addison's disease

B. Thyroxine (low level) 2. Diabetes

C. Corticoids 3. Hyperthyroidis1
D. Thyroxine (high level) 4. Goisre

A. B.
C. D.
chapter 10 Biomolecules
213

A Which of the following is a peptide hormone?

(a) Glucagon )Testosterone
(c) Thyroxine |(d) Adrenaline
95. Name the hormone.
() Responsible for development of secondary male characteristics.
(ü) Responsible for carbohydrate metabolism.
96. Which hormone is responsible for preparing uterus for implantation of fertilized egg?
(a) Estradiol |(b) Glucocorticoids
() Thyroxine (d) Progesterone

Assertion-Reason Questions
Given below are two statements, one is labelled as Assertion (A)and other is labelled as Reason (R).
Select the most appropriate answer from the options given below.
lal Both Aand R are true and is correct the explanation of A.
(b) Both A and R are true but Ris not the correct explanation of A.
(c) Ais true but R is false.
(a) A is false but R is true.
1. Assertion (A) Pentaacetate of glucose does not react with hydroxylamine.
Reason (R)Glucose on reaction with NaHSO,, does not form hydrogen sulphite addition
product.
(a) (b) O
2. Assertion (A) Melting points and solubility in water of amino acids are generally higher than
that of corresponding halo acids.
Reason (R) Dipolar behaviour due to proton acceptor and proton donor moiety results in
strong electrostatic interaction.
(b)
3. Assertion (4) Cellulose is apolysaccharide that provides structural support to plants.
Reason (R)Cellulose is composed of ß-D-glucose units linked by glycosidic bonds.
(a) O (b) O (c) D
4. Assertion (A) Amino acids are amphoteric in nature.
Reason (R) Amino acids can act as both acids and bases due to the presence of both
carboxyl and amino groups.
(a) (b) D (c)
5. Assertion (A) Water present in the egg disappears after boiling the egg.
Reason (R) Protein present inside the egg get denatured and coagulate which absorb all
water present.
(a) (b) O (c) D
 Chemistry Class Yu
NCERT REVISION WORKBOOK
214
disruption of their secondary
an3
Assertion (A) Denaturation of proteins involves the
6.
tertiary structures. proteins.
the loss of biological activity of
Reason (R) Denaturation leads to
(d) D
micronutrients required in smallamounts for varione.
are essential
7. Assertion (A) Vitamins
physiological functions. obtained
be synthesized by the human body and must be
Reason (R) Vitamins cannot
from the diet.

(a) (b) O
in our body.
8. Assertion (A) Vitamin-D can be stored [NCERT Exemplar
vitamin.
Reason (R) Vitamin Dis fat soluble

(a) (b) O
structure.
9. Assertion (A) RNA has double strand helix
among the quantities of
Reason (R) When RNA is hydrolysed, there is no relationship
different bases obtained.

(a) D (b) O (c)

10. Assertion (A) Enzymes are highly specific in their action.
structure that is
Reason (R) The active site of an enzyme has a unique shape and
complementary to its substrate.
(b) O

Case Based Questions

1. Carbohydrates are essential biomolecules that serve as our primary energy source. They
come in various forms, ranging from simple sugars like glucose and fructose to complex
polysaccharides like starch and cellulose. The sweetness of different sugars varies, with
fructose being the sweetest and lactose the least sweet among common sugars. The human
body processes these carbohydrates through a series of enzymatic reactions, ultimately
converting them into glucose, which is used for 'energy production.
(i) Which of the following is the sweetest natural sugar?
(a) Glucose O()Sucrose
(c) Fructose D(d) Lactose
(ü) Which polysaccharide serves as the primary energy storage molecule in plants?
(a) Cellulose O(o) Glycogen
(c) Starch D(d) Chitin
(ii) Which of the following enzymes is involved in the breakdown of starch?
(a) Amylase (b) Lactase
(c) Sucrase (d) Maltase
chapter10 Biomolecules 215

liv) Which of the following carbohydrates is a non-reducing

sugar?
(a) Maltose O(b) Lactose
(c) Sucrose O(d) Glucose
2. Proteins are complex biomolecules composed of amino acids linked together by peptide
bonds. They play crucial roles in various biological processes, serving as enzymes,
hormones, antibodies, and structural components. The sequence of amino acids in a protein
determines its unique three-dimensional structure and function. Proteins can be denatured
by factors like heat, pH changes, and chemicals, leading to the los of their biological activity.
() Which of the following is the bond that links amino acids in a protein?
(a) Glycosidic bond D(b) Ester bond
(c) Peptide bond D(d) Hydrogen bond
(i) Which level of protein structure is characterized by the formation of alpha-helices and
beta-sheets?
(a) Primary D(b) Secondary
(c) Tertiary O(a) Quaternary
(i) Which of the following is a fibrous protein?
(a) Insulin O(b) Haemoglobin
(o) Collagen O(a) Amylase
(iv) Which of the following factors can denature proteins?
(a) High temperature O(b) Extreme pH
(c) Heavy metals O(d) Al of theses

COMPETITION EDGE UP
. Which of the following is the correct structure 2. The incorect statement about glucose is
[NCERT (New) Pg 233, JEE Main 2024]
of L-glucose? [NCERT (New) P 283, JEE Maln 2024]
(a) Glucose is an aldohexose.
CHO CHO (b)Glucose is one'of the monomer unit in
HO sUcrose.
HO
D6) Ho (c) Glucose is soluble in water because of having
HO
aldehyde functional group.
(d)Gluc0se remains in multiple isomeric form in
H OH
HO its aqueous solution.
H,0H CH,OH
3. Sugar which does not give reddish brown
CHO CHO
precipitate with Fehling's reagent,
HO -OH [NCERT (New) Pg 237, JEE Main 2024]
O D) H0 (a) maltose
HO -H H -OH
-H
(b) lactose
HO HO
(c) glucose
CH,OH CH,OH (d)sucrose
 NCERTREVISION WORKBOOK Chemistry Class
YI
216

Choose the correct answer from the options

4. CHO given below.
A B D
HO H
H

VI
CH,OH
The incorrect statement regarding the given
structure is NCERT (New) Po 283, JEE Main 2024) 7. The incorrect statemets regarding enzymes
(NCERT (New) Pg 295, JEE Main 2024]
(a) willcoexist in eçuilibrium with 2 other cyclic are
structure A. Enzymes are biocatalysts.
catalyse
(b) has 4 asymmetric carbon atom B. Enzymes are non-specific and can
different kinds of reactions.
(c) despite the presence of CHO does not give
Schiff's test C. Most enzymes are globular proteins.
(d) can be oxidised to a dicarboxylic acid with D.Enzyme-oxidase catalyses the hydrolysis of
Br, water maltose into glucose.

5. Motch List Iwith List II. Choose the correct answer from the options
[NCERT (New) Pg 286, JEE Main 2024] given below

List I
(a)B and D
List l
1(6) B and C
A. & Glucose and Functional
&- Galactose isomers (c)A, B and C
(d) B, C and D
B. a- Glucose and . Homologous
B- Glucose 8. Type of amino acids obtained by hydrolysis of
C. a- Glucose and I. Anomers proteins is NCERT (New) Pg 299, JEE Main 2024]
- Fructose O(b) a
D. - Glucose and IV. Epimers (c)B
- Ribose
9. Coagulation of egg, on heating is because of
Choose the correct answer from the options [NCERT (New) Pg 299, JEE Main 2024]
given below: (a) biological property of protein remains
(a) A- , B- IV, C- I, D- I unchanged
(b)A- , B- IV, C- 1, D- | (b) the secondary structure of protein remains
(c)A V, B- IlII, C- I, D- I unchanged
() A- IV, B-lll, C- , D- 1 (c) breaking of the peptide linkage in the primary
structure of protein occurs
6. Match List-lwith List-l).
[NCERT (New) Po 283, JEE Maln 2024] (d) denaturation of protein occurs.
List-l List-ll I0, The reagents with which glucose does not
1. Gluconic acid
react to give the corresponding tests/products
A Glucose/ are NCERT (New) Pg. 283, NEET 2024)
NaHcO, /A A, Toilen's reagent B. Schiff's reagent
Glucose/HNO, II, No reaction C, HCN D. NH,OH E. NaHSO,
C. Glucose HI/A II. mhexane Choose the correct options from the given
below:
Glucpse/bromine IV, Saccharic acid (a) B and C
water
(b) A and D
(c) Band E O (d) E and D
chapter 10 Biomolecules
217

) Given below are two

statements,
Statement l Aunit formed by the 14. Sucrose on hydrolysis gives
ottachment of a base to l'-position of sugar is [NCERT (New) Pa. 237, NEET 2020]
known as nucleoside, (a) B-D-glucose + d-D-fructose
Statement ll When nucleoside is linked to (b) a-D-gucose + -D-glucose
phosphorus acid at S-position of sugar moiety, (c) a-D-glucose + B-D-fructose
we get nucleotide, (d) a-D-fructose + B-D-fructose
ln the light of the above
statements, choose
the correct answer from the IS. The reaction of concentrated
sulphuric acid
options given with carbohydrates (C12 H,0,)is an example
below NCERT (New) Pg 298, NEET 2023) of
(a) Both Statement Iand Statement [NCERT (New) Po. 293, NEET (0et.) 2020]
ll are (a) dehydration
false.
(b) Statement Iis true but Statement ll (b) oxidation
is (c) reduction
false.
(c)Statement Iis false but Statement ll is (d) sulphonation
true.
l6. Deficiency of which vitamin causes
()Both Statemnent Iand Statement ll
are true. osteomalacia?
(NCERT (New) Po. 296, NEET (Oet.)2020]
(a) Vitamin A
2, The incorrect statement regarding
enzymes is (b) Vitamin D
[NCERT (New) Pg 295, NEET 2021)
(a) Like chemical catalysts enzymes reduce the (c) Vitamin K
activation energy of bio processes. (d) Vitamin E
(b) Enzymes are polysaccharides. I7. Which of the following statements is not
() Enzymes are very specific for a particular true
reaction and substrate.
about glucose?
[NCERT (New) Pg. 283, NEET (Oct) 2020]
(d) Enzymes are biocatalysts. (a) lt is an aldohexose.
I3. The RBC deficiency is deficiency disease of (b) It contains five hydroxyl groups.
NCERT (New) Pg. 296, NEET 2021) (c) t is a reducing sugar.
(a) Vitamin B (b) Vitamin B D (d) It is an aldopentose.
(c) Vitamin B, D a) Vitamin B, D