BIOMOLECULES ASSIG-1

1. Watson-Crick model. of structure of DNA exhibits 5. Identify the given organic. molecule represented by figure
below.
(1) Primary structure
(2) Secondary structure
(3) Tertiary structure
(4) Quaternary structure
2. The most abundant proteins. in whole of the biosphere
and animal world, respectively are
(1) Collagen and RuBisCO
(2) Glucose and collagen (1) Palmitic acid
(3) Starch and glucose (2) Glycerol
(4) RuBisCO and collagen (3) Lecithin
3. In primary structure. of a protein, left end is represented (4) Cholesterol

by A amino acid and is also called B amino acid

¯¯¯¯¯¯¯¯ ¯¯¯¯¯¯¯¯
6. Fats have A Melting. point and remain B at room
as

whereas right end is represented by C amino acid ¯¯¯¯¯¯¯ ¯¯¯¯¯¯¯

and is also called D amino acid. C¯h¯¯o¯¯o¯¯s¯e the option temperature while oils have C melting point and

which correctly fill t¯h¯¯e¯¯¯b¯¯lanks A, B, C and D. remain as D ¯¯¯¯¯¯¯

A B C D ¯¯¯¯¯¯¯ at room temperature.
A B C D
(1) First C-terminal Last N-terminal (1) High Liquid Low Solid
(2) Last C-terminal First N-terminal (2) Low Liquid High Solid
(3) First N-terminal Last C-terminal (3) Low Solid High Liquid
(4) High Solid Low Liquid
(4) Last N-terminal First C-terminal

(1) (1)
(1) (1)
(2) (2)
(2) (2)
(3) (3)
(3) (3)
(4) (4)
(4) (4)
7. How many types. Of amino acids are present in a protein?
4. Read the. following given statements and choose the
correct option w.r.t. nucleotides. (1) 24
(a) Nucleotides are the polymers of nucleic acid.
(2) 25
(b) If a phosphate group is found esterified to the sugar of
nucleoside, it is termed as a nucleotide. (3) 20
(c) Uridylic acid is a nucleotide which is found only in
DNA. (4) 16
(d) In a nucleotide, nitrogenous base is linked to sugar by
8. Read the items. listed in box given below.
glycosidic bond.
Collagen, RuBisCO, Chitin, Inulin, Cellulose, Glycogen
(1) Statements (a) and (b) are correct
How many among them are structural homopolymers?
(2) Statements (b) and (d) are correct (1) One
(3) Statements (b) and (c) are correct (2) Three
(4) Statements (a) and (c) are correct (3) Two
(4) Four

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9. Read the following statements. w.r.t. DNA and select the 15. The amino .acids are acidic, basic and neutral based on the
correct option. number of
Statement A: The two strands of polynucleotides are (1) Amino groups and hydrogen
parallel to each other with nitrogenous bases that face
out side. (2) Amino and carboxyl groups
Statement B: The backbone of nucleic acid is formed by (3) Carboxyl groups and hydrogen
the sugar-phosphate-sugar chain.
(4) Only carboxyl groups
(1) Both statements A and B are correct
(2) Both statements A and B are incorrect 16. In a polysaccharide chain. such as glycogen, the right end
is called the and the left end is called the
(3) Only statement A is correct respectively.
(4) Only statement B is correct (1) Reducing end, reducing end

10. Following is a. representation of an enzymatic reaction (2) Non-reducing end, non-reducing end
E
(3) Non-reducing end, reducing end
S − G + S′ → S + S ′ − G
Select the correct option which represents E for above (4) Reducing end, non-reducing end
reaction
17. Assertion (A): Starch. I2 complex is blue in colour.
(1) Lyase Reason (R): Starch can hold I2 in its helical secondary
(2) Ligase structure.
In the light of the above statements, choose the correct
(3) Transferase answer from the options given below
(4) Isomerase Both (A) and (R) are true and (R) is the correct
(1)
explanation of (A)
11. How many. of the following is/are chemically proteins?
Collagen, Trypsin, Insulin, Antibody, Both (A) and (R) are true but (R) is not the correct
(2)
Receptor, GLUT-4 explanation of (A)
Select the correct option.
(3) (A) is true but (R) is false
(1) Four
(4) (A) is false but (R) is true
(2) Six
18. Select the. mismatch w.r.t. secondary metabolites listed
(3) Five and their description.
(4) One (1) Alkaloid – Morphine

12. Haemoglobin has 2 α-chains. and 2 β-chains. The highest (2) Toxin – Carotenoids
level of organization exhibited by it is (3) Drug – Vinblastin
(1) Primary 2.Secondary (4) Essential oils – Lemon grass oil
(2) Tertiary 4.Quaternary
19. The biomolecule that cannot. be hydrolysed further is
13. How. many C-atoms are present in arachidonic acid
(1) Starch
excluding the carbon of carboxylic acid group?
(2) Glycogen
(1) 19
(3) Cellulose
(2) 20
(4) Glucose
(3) 16
(4) 15 20. Increasing order of organic. compounds in protoplasm is
(1) Proteins, Lipids, Nucleic acids, ions
14. Cell membranes. are broken into pieces to form vesicles
which get separated along with (2) Proteins, carbohydrates, Lipids, Nucleic acids
(1) Acid-soluble pool (3) Carbohydrates, Lipids, Nucleic acids, ions
(2) Acid-insoluble pool (4) Lipids, carbohydrates, Nucleic acids, proteins
(3) Ash 21. The most abundant. chemical compound in living
(4) Filtrate organisms is
(1) Proteins
(2) Nucleic acids
(3) Water
(4) Carbohydrates

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22. Hydroxy methyl. group as R-group is present in which of the 28. Choose. the option that matches items listed in column A
following amino acids? with column B.
(Column A) (Column B)
(1) Glycine Category Secondary metabolites
(2) Serine a. Alkaloids (i) Lemon grass oil
(3) Cysteine b. Drug (ii) Concanavalin A
(4) Valine c. Essential oils (iii) Anthocyanin

23. Which of. the following represents zwitterionic form of an d. Lectins (iv) Morphine
amino acid? (v) Vinblastine
a b c d
(1) (iv) (v) (i) (ii)
(1)
(2) (i) (ii) (iii) (iv)
(3) (v) (iv) (i) (ii)
(4) (iv) (ii) (iii) (v)

(2) (1) (1)

(2) (2)
(3) (3)
(4) (4)
(3)
29. Read. the following given statements and choose the
correct option w.r.t. chemical analysis of living tissue.
Statement A: Retentate is the acid-soluble fraction.
Statement B: Filtrate is the acid-insoluble fraction.

(4) (1) Both statements are incorrect

(2) Both statements are correct
(3) Only statement A is correct
24. Chitin. present in exoskeleton of insects is a
(4) Only statement B is correct
(1) Homopolymer
30. Which of the following. is a toxic secondary metabolite?
(2) Heteropolymer
(1) Anthocyanin
(3) Conjugated lipid
(2) Codeine
(4) Conjugated protein
(3) Vinblastin
25. Enzymes. that catalyse oxidation-reduction reactions are
called (4) Ricin

(1) Oxidoreductases 31. Nucleotides in a nucleic. acid are linked together with the
help of
(2) Transferases
(1) Glycosidic bonds
(3) Hydrolases
(2) Peptide bonds
(4) Lyases
(3) Disulphide bonds
26. After performing. the chemical analysis of organic
compounds found in living organisms, the fraction obtained (4) Phosphodiester bonds
in acid-insoluble pool is called 32. Which of the following. is not a homopolymer?
(1) Filtrate (1) Cellulose 2.Starch
(2) Retentate 3. Glycogen 4.Insulin
(3) Aquous pool
(4) Inorganic pool
33. If .the total amount of adenine in a double stranded DNA
27. Which. among the following gives positive iodine test by molecule is 30%, what will be the amount of pyrimidines in the
giving blue-black color? at DNA molecule?

(1) Starch 2.Cellulose (1) 50% 2.(2) 30%

3.Chitin 4.Glycogen (3) 40% 4.(4) 60%

34. The type. of protein structure represented by alpha helix is
(1) Primary 2.Secondary
(2) Tertiary 4.Quaternary

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39. All of the following .are made up of cellulose, except

35. Read the given. statements and choose the correct (1) Plant cell wall 2.Cotton fibre
option.
(2) Paper made from plant pulp 4.Bacterial cell wall
Statement I : In solutions of different pH, the structure of
amino acids changes. 40. Which of. the following polysaccharides are found in
Statement II : An amino acid may exist as zwitterionic form, exoskeletons of arthropods?
anionic form or cationic form depending on the pH of the
solution. (1) Inulin

(1) Only statement I is correct (2) Chitin

(2) Only statement II is correct (3) Peptidoglycan

(3) Both the statements are correct (4) Hyaluronic acid

(4) Both the statements are incorrect 41. A secondary metabolite. which can also be used as a
drug against cancer is
36. The simplest amino. acid with lowest molecular weight
and no asymmetrical carbon atom is (1) Monoterpene

(1) Methionine 2.Alanine (2) Diterpene

(2) Glycine 4.Tryptophan (3) Vinblastin

37. Choose the .correct sequence of events (4) Carotenoid

a. Active site of enzyme breaks the chemical bonds of the 42. Assertion (A): All. monosaccharides are reducing
substrate. sugars.
b. The enzyme releases the product of reaction. Reason (R): Monosaccharides possess free aldehyde or
c. Substrate binds to active site of enzyme. ketone group.
d. Binding of substrate induces enzyme to alter its shape. In the light of above statements, choose the correct
e. Enzyme product complex is formed. option.
(1) a → b → c → d → e Both Assertion & Reason are true and reason is the
(1)
(2) c → d → a → e → b correct explanation of the assertion.
(3) c → a → d → e → b Both Assertion & Reason are true but reason is not
(2)
(4) c → d → e → a → b the correct explanation of the assertion.

38. Observe the .structure given below. (3) Assertion is true statement but Reason is false.
(4) Both Assertion and Reason are false statements.

43. The two functional groups characteristic of sugars are

X represents a/an (1) Hydroxyl and sulfhydryl
(1) Ionic linkage 2.Peptide bond (2) Methyl and carboxyl
(2) Glycosidic bond 4.Ester bond (3) Carbonyl and hydroxyl
(4) Hydroxyl and phosphate
44. Read. the following statements A & B and choose the
correct answer
Statement A: All the elements present in sample of earth’s
crust are also present in a sample of living tissues
Statement B: Relative abundance of carbon & hydrogen
with respect to other elements is higher in any living
organism than in earth’s crust
(1) Both statements A & B are correct
(2) Both statements A & B are incorrect
(3) Only statement A is correct
(4) Only statement B is correct

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45. Which of. the following carbohydrates are classified in the 48. The four elements. making more than 90% of all the
correct category? elements found of living system are
(1) C, H, O, S
(1) Maltose, glucose, galactose – Hexoses
(2) C, H, O, P
(2) Sucrose, lactose, maltose – Disaccharides
(3) C, H, O, N
Glucuronic acid, glycerol, ribose – Derived
(3)
monosaccharides (4) C, P, O, N
(4) Ribose, fructose, deoxyribose – Pentoses 49. When a. tissue is fully burnt the element completely
oxidised to gaseous form is
46. Choose the correct set .of primary metabolites.
(1) Calcium
(1) Curcumin and codeine
(2) Carbon
(2) Glucose and cellulose
(3) Magnesium
(3) Valine and vinblastin
(4) Sodium
(4) Tyrosine and glucose
50. Concanavalin. A is a type of secondary metabolite
47. While analysing .the average composition of a cell, a categorized as a
research student found some biomacromolecule, which is
5-7% of the total cellular mass. These macromolecules (1) Lectin
could be
(2) Alkaloid
(1) Lipids
(2) Nucleic acids (3) Drug

(3) Carbohydrates (4) Protein transporter

(4) Proteins