NCERT CLASS 11 | TOPIC : BIOMOLECULES | QB-1 | NEET BIOLOGY ONLINE TEST

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NCERT CLASS 11 | TOPIC : BIOMOLECULES | QB-1 | NEET BIOLOGY ONLINE TEST

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It contains 100 important questions. Choose the most correct answer. Then check your answer. Try again if there are errors. Regards : www.onlinetest.kalvisolai.com

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1 ➤ 1. Which elements are abundantly found in living organism with comparison to earth’s crust?

(a) Carbon (b) Hydrogen (c) Oxygen (d) All of these

2 ➤ 2. To analyse the chemical composition of living tissue we solubilize them in

(a) HNO₃ (b) HCl (c) CF₃ COOH (d) CCI₃ COOH

3 ➤ 3. The percentage of oxygen in human body is

(a) 65% (b) 46.6% (c) 18.5% (d) 3.3%

4 ➤ 4.

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Fill in the blanks in (1) and (2) in the above fl owchart.

(a) a → greater than 1000 Dalton b → Nucleotide (b) a → 18.800 Da b → Nucleic acid (c) a → greater than 10,000 Da b → Oligosaccharides (d) a → greater than 1000 Dalton b → Nucleoside

5 ➤ 5. All the carbon compounds that we get from the living tissues can be called

(a) Bioresource (b) Bioinformatics (c) Biowar (d) Biomolecules

6 ➤ 6. Select the incorrect compounds that we get from living tissues can be called:

(a) Elemental analysis of living tissues gives elemental composition of living tissue. (b) Analysis of chemical compound of living tissue gives idea of organic and inorganic constituent of living tissue. (c) Weight of small amount of living fresh tissue is known as wet weight. (d) Acid soluble pool contain lipids, nucleic acid, polysaccharide only.

7 ➤ 7. The biomolecule whose weight is less than____ dalton (Da) is referred to as biomicromolecule.

(a) 800 (b) 18 (c) 1000 (d) 10,000

8 ➤ 8. Which of the following is not a macromolecule?

(a) Nucleic acid (b) Polysaccharides (c) Lipids (d) Proteins

9 ➤ 9. Lipids are extracted with acid insoluble fraction because

(a) Its molecular weight is less than 800 Da (b) It form vesicle or micelle which are not water soluble (c) It is a polymer (d) It is not a polymer

10 ➤ 10. Select the incorrect matching for component percentage in living cell:

(a) Water . 70 to 90% (b) Proteins . 10 to 15% (c) Carbohydrate . 2% (d) Nucleic Acid . 5 to 7%

11 ➤ 11. _________ of the total cell mass is formed by ions.

(a) 1% (b) 2% (c) 3% (d) 4%

12 ➤ 12. Monomeric unit of cellulose is

(a) Glucose (b) Fructose (c) Mannose (d) Ribose

13 ➤ 13. Monomeric unit of inulin is

(a) Glucose (b) Fructose (c) Mannose (d) Ribose

14 ➤ 14. Which of the following is homopolysaccharide?

(a) Cellulose (b) Inulin (c) Starch (d) All of these

15 ➤ 15. Starch forms helical _________ structure that can hold _________ molecule and gives blue colour.

(a) primary, I₂ (b) secondary, I₂ (c) tertiary, I₂ (d) quaternary, I₂

16 ➤ 16. Select the incorrect statement from the following:

(a) Cellulose does not contain complex helices. (b) Cellulose does not give colour with I2. (c) Cotton fibre, plant cell wall are made up of cellulose. (d) Cellulose is heteropolysaccharide.

17 ➤ 7. Which of the following is amino-sugar?

(a) Glucosamine (b) Galactosamine (c) Both (a) and (b) (d) None of these

18 ➤ 18. Chitin is a

(a) Homopolysaccharide (b) Heteropolysaccharide (c) Oligosaccharide (d) Monosaccharide

19 ➤ 19. Chitin is present in

(a) Exoskeleton of arthropods (b) Cell wall of fungus (c) Setae of earthworm (d) All of these

20 ➤ 20. In glycogen, which kind of linkage is found between adjacent glucose molecule?

(a) 1, 4 (b) 1, 6 (c) both (d) 1, 2

21 ➤ 21. Which of the following is incorrect about glycogen?

(a) It is a stored form of glucose in animals. (b) In glycogen, the right end is reducing and the left end is non-reducing. (c) It is a branched polymer of glucose. (d) It is a stored form of glucose in plants.

22 ➤ 22. The bond formed between two adjacent monosaccharide is

(a) Peptide bond (b) Ester bond (c) Glycosidic bond (d) Ionic bond

23 ➤ 23. Blood concentration of glucose in normal healthy individual is

(a) 2.3 mM (b) 4.5.5 mM (c) 6.7 mM (d) 1 mM

24 ➤ 24. Which is the correct Haworth structure of glucose?

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A) B) C) D)

25 ➤ 25. Which is the correct representation of ribose?

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A) B) C) D)

26 ➤ 26. Which of the following is a stored form of energy in plant?

(a) Starch (b) Cellulose (c) Glycogen (d) Chitin

27 ➤ 27. Lipids are

(a) Compounds of carbon, hydrogen and oxygen (b) Compounds of glycerol and fatty acid (c) Insoluble in water (d) All of these

28 ➤ 28. Lipids may be

(a) Fatty acid (b) Glycerol (c) Compound respectively of both (d) All of these

29 ➤ 29. What is the number of carbon atoms which the palmitic and arachidonic acid contain (including carboxyl carbon)?

(a) 16, 19 (b) 15, 19 (c) 16, 20 (d) 18, 20

30 ➤ 30. Fats or oils are

(a) Monoglycerides (b) Diglycerides (c) Triglycerides (d) Any of the above

31 ➤ 31. Which of following is an example of phospholipid?

(a) Palmitic acid (b) Arachidonic acid (c) Lecithin (d) Glycerol

32 ➤ 32. Which of the following is correct about lipids?

(a) On the basis on melting points they are divided into fats and oils. (b) Neural tissues are made up of simple lipids only. (c) Phospholipids never forms a part of cell membrane. (d) Lipids are strictly macromolecule.

33 ➤ 33. Select the incorrect matching regarding the following diagram:

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(a) Purine . Its metabolism forms uric acid (b) Uracil . It is exclusively found in RNA only (c) Adenylic acid . Monomer of both RNA and DNA (d) Cholesterol . Forms a part of cell membrane

34 ➤ 34. Which of the following is correct about amino acid?

(a) It is a compound containing amino and acidic group (.COOH). (b) It is a substitute and is methane. (c) It is based on the nature of eRf group they are of many types. (d) All the above

35 ➤ 35. How many amino-acids are used to form protein?

(a) 18 (b) 20 (c) 21 (d) 22

36 ➤ 36.

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(a) R → H (glycine), (b) R → CH3 (alanine), (c) R → CH2OH (serine) (d) All the above

37 ➤ 37. The chemical and physical property of amino acid is based on

(a) - NH2 group (b) - COOH group (c) - R group (d) All of these

38 ➤ 38. Match the column: Column I Column II

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A. Acidic - 1. Valine

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B. Basic - 2. Lysine

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C. Neural - 3. Glutamic acid

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D. Aromatic - 4. Tyrosine, phenylalanine, tryptophan.

(a) A.3, B.2, C.1, D.4 (b) A.2, B.3, C.4, D.1 (c) A.4, B.1, C.2, D.3 (d) A.1, B.2, C.2, D.4

39 ➤ 39.

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A) B) C) D)

40 ➤ 40. Protein is

(a) Homopolymer (b) Heteropolymer (c) Polypeptide (d) Both (b) and (c)

41 ➤ 41. Essential amino acids are those which are

(a) Not synthesized by our body (b) Not required by our body (c) Synthesized by our body (d) Only used to form proteins

42 ➤ 42. The most abundant protein in animal world is

(a) RuBisCo (b) Collagen (c) Elastin (d) Albumin

43 ➤ 43. The most abundant protein in whole biosphere is

(a) RuBisCo (b) Collagen (c) Elastin (d) Albumin

44 ➤ 44. Protein at

(a) Enzyme (b) Receptor (c) Antibody (d) All of these

45 ➤ 45. Match the column: Column I Column II

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A. Collagen - 1. Hormone

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B. Trypsin . 2. Enzyme

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C. Insulin - 3. Fight Infectious agent

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D. Receptor - 4. Enable glucose transport into cells

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E. GLUT.4 . 5. Sensory reception (smell, taste hormone) F. Antibody . 6. Intercellular ground substance

(a) A.3, B.2, C.4, D.1, E.6, F.5 (b) A.6, B.2, C.1, D.5, E.4, F.3 (c) A.1, B.4, C.2, D.5, E.3, F.6 (d) A.2, B.4, C.5, D.3, E.1, F.6

46 ➤ 46. The macromolecular fraction is comprised by which of the following?

(a) Polynucleotides (b) Polypeptides (c) Polysaccharides (d) All of these

47 ➤ 47. Protein is describ ed by biologists at _________ levels.

(a) 1 (b) 2 (c) 3 (d) 4

48 ➤ 48. Sequence or positional information of amino acid is given by the

(a) 2° structure (b) 1° structure (c) Tertiary structure (d) Quaternary structure

49 ➤ 49. In the primary structure of protein

(a) Left end represents → 1st amino acid (C-terminal amino acid) (b) Right end represents → Last amino acid (N terminal amino acid) (c) Left end represents → 1st amino acid (N-terminal amino acid) (d) Right end represents → 1st amino acid (C-terminal amino acid)

50 ➤ 50. Name the used amino acid in the above diagram.

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(a) Serine–Cysteine–Tyrosine–Glutamic acid (b) Serine–Methionin–Tryptophan–Glutamic acid (c) Serine–Methionin–Tyrosine–Aspartic acid (d) Serine–Cysteine–Tyrosine–Aspartic acid

51 ➤ 51. Which of the following is correct about secondary structure?

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(a) Helix is a primary structure. (b) In proteins only left handed helices are observed. (c) In proteins only right handed helices are observed. (d) None of these

52 ➤ 52. Which structure is absolutely necessary for the many biological activities of proteins?

(a) 1° (b) 3° (c) 2° (d) 4°

53 ➤ 53. When an assembly of more than one polypeptide occurs then it is known as _____ structure of protein.

(a) 1° (b) 2° (c) 3° (d) 4°

54 ➤ 54. Which of the following is correct about human Haemoglobin (Hb)?

(a) Made up to 2-a and 2-b subunits (b) Present in RBC (c) Use to carry O2 and CO2 (d) All of these

55 ➤ 55. Select the incorrect statement from the following:

(a) Most of the enzymes are protein. (b) ‘Hb’ is an example of quaternary structure of protein. (c) In the primary structure of protein, the left hand is N-terminal and the right hand is C-terminal. (d) In protein or polypeptide, the amino acids are linked by glycosidic bond.

56 ➤ 56. Which of the following possess heterocyclic ring?

(a) Adenine (b) Guanine and Cytosine (c) Thymine and Uracil (d) All of these

57 ➤ 57. Identify the nucleoside from the following:

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A. Adenosine

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B. Uridylic acid

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C. Uridine

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D. Cytidylic acid

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(a) A and B only (b) A and C only (c) C and D only (d) B and C only

58 ➤ 58. Which of the following acts as a genetic material?

(a) DNA and RNA (b) Uridylic acid (c) Adenylic acid (d) Guanylic acid

59 ➤ 59. Sugar + Nitrogen bases form

(a) Nucleoside (b) Nucleotide (c) Peptide (d) Glycoside

60 ➤ 60. Sugar + Nitrogen bases + Phosphate forms

(a) Nucleoside (b) Nucleotide (c) Peptide (d) Glycoside

61 ➤ 61. How many Nitrogen atoms are present in adenine?

(a) 3 (b) 4 (c) 5 (d) 6

62 ➤ 62. The diagrams represent the nitrogenous bases. Identify the correct combination.

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(a) A→Adenine; B→Thymine (b) A→Guanine; B→Uracil (c) A→Adenine; B→Uracil (d) A→Guanine; B→Thymine

63 ➤ 63. DNA and RNA are

(a) Polypeptides (b) Polynucleotides (c) Polysaccharides (d) All of these

64 ➤ 64. How much percentage of total cellular mass is formed by nucleic acid?

(a) 3 (b) 2 (c) 5 to 7 (d) 10 to 15

65 ➤ 65. Which of the following are purines?

a) Adenine (b) Guanine (c) Cytosine (d) Both (a) and (b)

66 ➤ 66. Which of the following are pyramidine (substituted)?

(a) Cytosine (b) Thymine (c) Uracil (d) All of these

67 ➤ 67. DNA contains

(a) Ribose (b) 3’ deoxyribose (c) 5’ deoxyribose (d) 2’ deoxyribose

68 ➤ 68. The bond present between two nucleotides is known as

(a) Phosphoester linkage (b) Phosphodiester linkage (c) Glycosidic linkage (d) Peptide linkage

69 ➤ 69. The Watson-Crick Structure of DNA is

(a) 1° structure (b) 2° structure (c) 3° structure (d) 4° Structure

70 ➤ 70. Which of the following is correct about DNA?

(a) Double helical structure in which two strands of polynucleotide runs antiparallel. (b) Backbone is formed by Sugar.Phosphate.Sugar chain. (c) N2-bases projected more or less perpendicular to back bone and faces inside. (d) All of these

71 ➤

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71. The diagrams represent the nitrogenous bases. Identify the correct combination.

(a) A→Adenine; B→Thymine (b) A→Guanine; B→Uracil (c) A→Adenine; B→Uracil (d) A→Guanine; B→Thymine

72 ➤ 72. Which one of the following is the diagrammatic representation of a nucleotide?

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A) B) C) D)

73 ➤ 73. Which one is correct about the following diagram?

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(a) It is a nucleotide. (b) It contains pyrimidine nitrogen base. (c) It is used to form DNA. d) It is used to form RNA.

74 ➤ 74. Which one is correct about DNA?

(a) DNA exist as double helix. (b) Two strands of polynucleotide in DNA are antiparallel. (c) The nitrogen bases are projected more or less perpendicular to this backbone but face inside. (d) All the above

75 ➤ 75. At each step of an ascent in a B-DNA double helical structure, the strand turns _________.

(a) 36° (b) 72° (c) 90° (d) 18°

76 ➤ 76. One full turn of B-DNA helix strand would involve how many base pairs?

(a) 12 (b) 8 (c) 10 (d) 20

77 ➤ 77. Select the incorrect statement from the following:

(a) N2-bases (A, G, C, T, U) have heterocyclic rings. (b) In most of the organisms, the DNA is genetic material. (c) Adenylic acid is nucleoside. (d) The rise per base pair in B-DNA is 3.4A°.

78 ➤ 78. There are _____ hydrogen bond between A and T, and _____ hydrogen bond between G and C.

(a) 2, 2 (b) 3, 3 (c) 2, 3 (d) 3, 2

79 ➤ 79. Plants produce an enormous diversity of substances that have no apparent roles in growth and development processes and are classified under the heading of

(a) Primary metabolites (b) Secondary metabolites (c) Necessary metabolites d) Tertiary metabolites

80 ➤ 80. Which one of the following is a secondary metabolite?

(a) Amino acid (b) Sugar (c) Flavonoides and antibiotics (d) Protein

81 ➤ 81. Which one of the following statement is incorrect?

(a) Primary metabolites have identifiable functions. (b) Some secondary metabolites have ecological importance. (c) Secondary metabolites like rubber, drugs, spices, scents and pigments are useful to human welfare. (d) Secondary metabolites are not found in fungi, microbes and plants.

82 ➤ 82. Which of the following are pigments?

(a) Morphine (b) Vinblastine (c) Carotenoids and anthocyanin (d) Ricin

83 ➤ 83. Which one of the following is not a polymeric substance?

(a) Rubber (b) Morphine (c) Protein (d) Cellulose

84 ➤ 84. Which of the following secondary metabolites are used as drugs?

(a) Abrin + Ricin (b) Vinblastin + Curcumin (c) Anthocyanins (d) Monoterpenes

85 ➤ 85. Which one of the following is a secondary metabolite?

(a) Lemon oil grass (b) Sucrose (c) Lactose (d) Glycine

86 ➤ 86. Match the Column Column I Column II (Category) (Secondary Metabolites)

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A. Pigments - 1. Concanavalin A

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B. Terpenoids - 2. Monoterpenes, Diterpenes

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C. Alkaloids - 3. Morphine, Codeine

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D. Lectins - 4. Carotenoids, Anthocyanine

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E. Toxins - 5. Abrin and Ricin

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F. Drugs - 6. Vinblastin, Curcumin

(a) A.1, B.2, C.6, D.4, E.5, F.6 (b) A.4, B.2, C.3, D.1, E.5, F.6 (c) A.3, B.4, C.6, D.5, E.1, F.2 (d) A.2, B.1, C.4, D.6, E.5, F.6

87 ➤ 87. Which one of the following are secondary metabolites?

(a) Flavonoids and rubber (b) Antibiotics, coloured pigments and essential oils (c) Scents, gums, spices (d) All the above

88 ➤ 88. Select the incorrect statement from the following:

(a) All biomolecules have turnover in cell. (b) Metabolic reaction does not occur in isolation. (c) Metabolic pathways are either linear or circular. (d) Metabolites flow is a steady state of body constituent.

89 ➤ 89. Select the incorrect statement from the following:

(a) Acetic acid becoming cholesterol is an example of biosynthetic or anabolic pathway. (b) Glucose becoming lactic acid in our skeletal muscles is an example of degradation or catabolic pathway. (c) The flow of metabolite through metabolic pathway does not have a definite rate and direction. (d) Anabolic pathway requires energy whereas catabolic pathway releases energy.

90 ➤ 90. Bond energy, which is stored in our body in the form of ATP is utilized in

(a) Biosynthetic phase (b) Osmotic work (c) Mechanical work (d) All of these

91 ➤ 91. Living state is

(a) Non-equilibrium, non-steady state (b) Equilibrium, steady state (c) Non-equilibrium, steady state (d) Equilibrium, non-steady state

92 ➤ 92. Select the correct statement from the following: ?

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(A) Biomolecules are in metabolic flux in living state.

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(B) Living process is a constant effort to prevent falling into equilibrium.

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(C) Metabolism provides a mechanism for the production of energy.

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(D) Living state and metabolism is synonymous.

(a) All except A (b) All except B (c) All except D (d) All of these

93 ➤ 93. In how many metabolic steps the degradation of glucose to lactic acid occurs?

(a) 8 (b) 9 (c) 10 (d) 2

94 ➤ 94. How do living organisms derive their energy? What strategies have they evolved? How do they store this energy and in what form? How do they convert this energy into work? These aspects are studied under a sub-discipline called

(a) Biowar (b) Bioinformatics (c) Bioenergetics (d) Biosynthesis

95 ➤ 95. Almost all enzymes are

(a) Proteins (b) Nucleic acid (c) Carbohydrates (d) Vitamins

96 ➤ 96. There are some nucleic acids that behaves like enzymes and are called

(a) DNase (b) RNase (c) Endonuclease (d) Ribozymes

97 ➤ 97. _________ of an enzyme is a crevices or pocket into which substrate fit.

(a) Inactive site (b) Active site (c) Allosteric site (d) Any of these

98 ➤ 98. Select the incorrect statement from the following:

(a) Active enzyme has tertiary structure having many active sites (substrate binding sites). (b) Enzymes are biocatalyst. (c) Enzymes occur in viruses. (d) Enzymes are mainly protein in nature.

99 ➤ 99. Select the correct statement from the following:

(a) Inorganic catalysts work efficiently at high temperature and high pressure while enzymes get damaged at high temperature (above 40‹C). (b) Ribozymes are nucleic acids behaving like enzyme. (c) Thermophilic organisms living in hot vents and sulphur springs have enzymes that are stable and retain their catalytic power even at high temperatures (80.90‹C). (d) All of these

100 ➤ 100. Select the incorrect statement from the following:

(a) A physical change simply refers to a change in shape without breaking of bonds. (b) Change is a state of matter and it is also a physical change. (c) Hydrolysis of starch into glucose is an inorganic chemical reaction. (d) Catalyzed reactions proceed at rates vastly higher than that of uncatalyzed ones.

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