sinfoera.com – MCQs, Mock Tests | IIT JEE IIT JEE CHEMISTRY Biomolecules And Biological Processes

1 Sucrose on hydrolysis yields a mixture which is

A Optically inactive B Dextro rotatory C Laevo rotatory D Racemic.

✅ Correct Answer: 3

2 Which disaccharide is present in milk ?

A Maltose B Galactose C Sucrose D Lactose.

✅ Correct Answer: 4

3 Which of the following enzymes helps in digestion of proteins ?

A Invertase B Trypsin C Triosinase D Urease.

✅ Correct Answer: 2

4 The linkage that holds monosaccharide units together in a polysaccharide is called

A Peptide linkage B Glycoside linkage C Hydroxide linkage D Nucleoside linkage.

✅ Correct Answer: 2

5 Lactose on hydrolysis yields

A Glucose B Fructose C Glucose and fructose D Glucose and galactose.

✅ Correct Answer: 4

6 A certain compound gives negative test with ninhydrin and positive test with Benedicts solution. The compound is

A A protein B A monosaccharide C A lipid D An amino acid.

✅ Correct Answer: 2

7 A sucrose molecule on hydrolysis yields

A Gloucose B Fructose C Glucose and fructose D Glucose and galactose.

✅ Correct Answer: 3

8 The letter D in D-glucose signifies

A dextri ritatory B mode of synthesis C its configuration D its dsiamagnetic nature.

✅ Correct Answer: 3

9 Ribose and 2-deoxyribose are

A Isomers B Diastereomers C Enantiomers D Aldopentoses.

✅ Correct Answer: 4

10 Which of the following is an example of zwitter ion ?

A Alanine B Glycine hydrochloride C Both of the above D None of these.

✅ Correct Answer: 1

11 Glycoside linkage is an

A amide linkage B ether linkage C ester linkage D None of these.

✅ Correct Answer: 2

12 Glucose and fructose are

A Isomers of each other B Homologues of each other C Anomers of each other D Enantiomers of each other.

✅ Correct Answer: 1

13 Hydrolysis of sucrose into (+) glucose and (-) fructose is known as

A Muta-rotation B Inversion C Pyrolysis D None of these.

✅ Correct Answer: 2

14 Which of the following is not a monosaccharide ?

A Glucose B Fructose C Glyceraldehyde D Surcose.

✅ Correct Answer: 4

15 A pyranose ring consists of a skeleton of

A 5 carbon atoms and one oxygen atom B 6 carbon atoms C 6 carbon atoms and one oxygen atom D 4 carbon atoms and one oxygen atom.

✅ Correct Answer: 1

16 Chhse is an example of

A Denaturede protein B Derived protein C Conjugated protein D Globular protein.

✅ Correct Answer: 1

17 The reagent which forms crystalline osazone derivative when reacted with glucose is

A Fehling solution B Phenylhydrazine C Benedict solution D Hydroxylamine.

✅ Correct Answer: 2

18 Which of the following is the simple carbohnydrate ?

A Glucose B Maltose C Sucrose D Glyceraldehyde.

✅ Correct Answer: 4

19 Maltose on hydrolysis yields

A Fructose B Glucose C Galactose D Glucose + Fructose.

✅ Correct Answer: 2

20 Amino acids are formed on hydrolysis of

A Fats B Proteins C Nucleic acids D Carbohydrates.

✅ Correct Answer: 2

21 Ribose is an example of

A Polysaccharide B Disaccharide C Hexose D Pentose.

✅ Correct Answer: 4

22 Glucose on oxidation with bromine water gives

A Glyceric acid B Gluconic acid C Saccharic acid D Pyruvic acid.

✅ Correct Answer: 2

23 Insulin is

A a protein B a hormone C Both of the above D None of these.

✅ Correct Answer: 3

24 Digestion of carbohydrates mainly takes place in

A Stomach B Small intestine C Large intestine D Mouth.

✅ Correct Answer: 2

25 Which of the following is not sweet in taste ?

A Lactose B Maltose C Galactose D Starch.

✅ Correct Answer: 4

26 Which of the following is an ketohexose ?

A Fructose B Maltose C Glucose D Ribose.

✅ Correct Answer: 1

27 Which of the following is a non reducing sugar ?

A Glyceraldehyde B Glucose C Fructose D Sucrose.

✅ Correct Answer: 4

28 he sweetest carbohydrate is .

A Sucrose. B Glucose C Fructose D Saccharine

✅ Correct Answer: 3

29 Which of the following compounds can reduce Tollens reagent ?I. Sucrose ; II. ; Glucose ; III. Fructose ; IV. Maltose.

A I, II, III and IV B II C II and III D II, III and IV.

✅ Correct Answer: 4

30 Whcih of the following bases is not present in DNA ?

A Thymine B Uracil C Adenine D Guanine.

✅ Correct Answer: 2

31 Which of the following is an example of aldopentose ?

A Glyceraldeyhde B Ribose C Fructose D Erythrose.

✅ Correct Answer: 2

32 Which of the following is an example of zwitter ion ?

A Aniline B Alanine hydrochloride C Glycine D All of the above.

✅ Correct Answer: 3

33 The number of polyeptide chains present in a molecule of haemoglobin is

A 8 B 6 C 4 D 12

✅ Correct Answer: 3

34 The energy released during conversion of ATP to ADP is approximately

A 31 KJ/mole B 3.0 KJ/mole C 28 KJ/mole D 2.8 KJ/mole

✅ Correct Answer: 1

35 Glucose on reaction with excess phenylhydrazine gives glucosazone. In this reaction one molecule of glucose reacts with_______ molecules of phenylhydrazine.

A Two B Three C Four D Six.

✅ Correct Answer: 2

36 In stomach the proteins are broken down into peptides by enzyme

A Trypsin B Pepsin C Chymotrypsin D Amylase.

✅ Correct Answer: 2

37 Classification of proteins into fibrous and globular forms is on the basis of

A Primary structure B Secondary structure C Tertiary structure D Quarternary structure.

✅ Correct Answer: 3

38 Glucose on oxidation with nitric acid yields

A Giucaric acid B Gluconic acid C Oxalic acid D Sorbitol.

✅ Correct Answer: 1

39 Pyrimidine bases present in RNA are

A Adenine and guanine B Thymine and uracil C Uracil and cytosine D Thymine and cytosine.

✅ Correct Answer: 3

40 A nucleoside is made up of a

A base and sugar B base and phosphoric acid C sugar and phosphoric acid D sugar, a base and phosphoric acid.

✅ Correct Answer: 1

41 The first stage of oxidation of carbohydrates is known as

A Glycolysis B Celluar respiration C Krebs cycle D Anabolism.

✅ Correct Answer: 1

42 Reference proteins are those obtained from

A Milk B Soyabean C Meat D Egg

✅ Correct Answer: 4

43 Digestion of lipids occurs primarily in

A Stomach B Small intestine C Mouth D Large intestine.

✅ Correct Answer: 4

44 Whcih of the following is protozoal disease ?

A Mumps B Measles C Syphilis D Malaria.

✅ Correct Answer: 4

45 Adenosine monophosphate (AMP) is a/an

A nucleotide B nucleoside C enzyme D nucleic acid.

✅ Correct Answer: 1

46 Whcih of the following bases is a purine ?

A Thymine B Uracil C Cytosine D Adenine.

✅ Correct Answer: 4

47 Which of the following is most abundant in the living world ?

A Starch B Proteins C Glucose D Cellulose.

✅ Correct Answer: 4

48 Insulin is secreted by

A Pancres B Stomach C Thyroid D Adernal medula.

✅ Correct Answer: 1

49 The linkage which holds various amino acid units in primary structure of proteins is

A glycoside linkage B peptide linkage C ionic linkage D hydrogen bond.

✅ Correct Answer: 2

50 Gums and pectins are examples of .

A Protiens B Lipids C Enzymes D Polysaccharides

✅ Correct Answer: 4

51 Glycylalanine and alanylglycine are

A Stereosisomers B Structural isomers C Diastereomers D Identical.

✅ Correct Answer: 2

52 Whcih of the following fatty acids is a saturated fatty acid ?

A Oleic acid B Linoleic acid C Linolenic acid D Stearic acid.

✅ Correct Answer: 4

53 Which of the following is not proteinous ?

A Wool B Hair C Nails D DNA.

✅ Correct Answer: 4

54 Glucose gives silver mirror with Tollens reagent. It shows the presence of a/an

A Alcoholic group B Keto group C Aldehydic group D Acidic group.

✅ Correct Answer: 3

55 In myoglobin the number of polypeptide chains associated with one heme unit is

A Three B One C Two D Four.

✅ Correct Answer: 2

56 With which of the following disease is Vitamin K associated ?

A Rickets. B Coagulating property of blood C Scurvy D Sore throat.

✅ Correct Answer: 2

57 Which of the following is not a sugar ?

A Sucrsoe B Glucose C Fructose D All are sugars.

✅ Correct Answer: 4

58 Which name is associated with the chemical substances produced in endocrine ductless glands ?

A Vitamins B Antigens C Bile acids D Hormones.

✅ Correct Answer: 4

59 The main structural feature of proteins is

A Peptide linkage B Glucoside linkage C Ether linkage D All the three.

✅ Correct Answer: 1

60 Glucose cannot be classified as

A Hexose B Carbohydrate C Aldose D Oligosaccharide.

✅ Correct Answer: 4

61 nvert sugar is

A A variety of cane sugar B Optically inactive form of sugar C Mixture of glucose and fructose in equimolar proportion D Mixture of glucose and galactose.

✅ Correct Answer: 3

62 In cellular respiration, there is a net gain of _________ per molecule of glucose

A 38 ATP molecules B 50 ATP molecules C 36 ATP molecules D 10 ATP molecules.

✅ Correct Answer: 3

63 Catabolism refers to

A breakdown of complex molecules in living organisms B synthesis of complex molecules C breakdown of complex molecules D None of these.

✅ Correct Answer: 1

64 Biochemical reactions which require oxygen are called

A Metabolic B both synthesis as well as C Anaerobic D No specific name.

✅ Correct Answer: 2

65 Which chemical substance act as emulsifiers in lipid metabolism ? .

A Hydrochloric acid B Bile acids C Nucleosde D Fatty acids

✅ Correct Answer: 2

66 During digestion which enzyme converts peptides into amino acids

A Peptidase B Invertase C Lipase D Maltsae

✅ Correct Answer: 1

67 When hemiacetal reacts with alcohol, the product is

A Dihemiacetal B Alcohol C Peptide D Acetal.

✅ Correct Answer: 4

68 The amino acids are the end products of the digestion of

A Lipids B Fats C Proteins D Enzymes.

✅ Correct Answer: 3

69 Which of the following can be used for detection of traces of iodine ?

A Glucose in aqueous solution B Starch in aqueous solution C Cellulose in alcoholic solution D Cellulose in aqueous solution.

✅ Correct Answer: 2

70 The constituent units of sucrose are

A lactose and glucose B glucose and fructose C galactose and glucose D glucose and maltose.

✅ Correct Answer: 2

71 Which one of the following is synthesized in our body by sun rays?

A Vitamin D B Vitamin B C Vitamin K D Vitamin A

✅ Correct Answer: 4

72 During glycolysis one molecule of glucose breaks into

A Two molecules of acetic acid B Three molecules of acetic acid C Two molecules of pyruvic acid D Three molecules of pyruvic acid.

✅ Correct Answer: 2

73 Which carbohydrate is an essential constituent of plant cells ?

A Starch B Sucrose C Glucose D Cellulose.

✅ Correct Answer: 4

74 Denaturation of protein does not have any effect on its

A Secondary structure B Tertiary structure C Quaternary structure D Primary structure.

✅ Correct Answer: 4

75 The force of attraction between the neighbouring peptide chains is

A van der Waals force B Covalent bond C Hydrogen bond D Peptide linkage.

✅ Correct Answer: 3

76 Fructose has

A Bitter taste B Sweet taste C Tasteless D Salty taste.

✅ Correct Answer: 2

77 ATP represents

A abnormal temperature ande pressure B atmospheric temperature C adenosine triphosphate D None of these.

✅ Correct Answer: 3

78 The region of plants where photosynthesis occurs is called .

A Mitochondria B Chloroplast C Cytoplasm D None of these

✅ Correct Answer: 2

79 Whcih one of following vitamins checks night blindness ?

A A B B C C D D

✅ Correct Answer: 1

80 Hyperglycemia refers to

A High blood sugar level B Low blood sugar level C High concentration of salts in blood D Low concentration of salts in blood.

✅ Correct Answer: 1

81 Photosynthesis involves

A conversion of chemical energy into radiant energy B conversion of chemical energy into mechanical energy C conversion of solar energy into chemical energy D conversio of mechanical energy into chemical energy.

✅ Correct Answer: 4

82 Which of the following is a test for proteins ?

A Molischs test B Beilstein test C Biuret test D Benedicts test.

✅ Correct Answer: 3

83 Enzymes are

A Steroids B Proteins C Fatty acids D Nucleic acids.

✅ Correct Answer: 2

84 Biuret test is used for the detection of

A Sugars Proteins B Proteins C Fats D Starch.

✅ Correct Answer: 2

85 At isoelectric point, the amino acid has

A Least viscosity B Maximum surface tension C Maximum solubility D All of the above.

✅ Correct Answer: 1

86 Peptids on hydrolysis give .

A Ammonia B Amines C Amino acids D Hydroxy acids

✅ Correct Answer: 3

87 Which of following is an example of fibrous protein ?

A Insulin B Haemoglobin C Fibroin D Glucogen.

✅ Correct Answer: 3

88 The enzyme that converts starch into maltose is called

A Zymase B Maltase C Invertase D Amylase.

✅ Correct Answer: 4

89 The proteins with a prosthetic group are known as

A Complix proteins B Conjutated proteins C Secondary proteins D Essential proteins.

✅ Correct Answer: 2

90 The non-proteinous substances which certain enzymes require for their activity are called

A Catalysts B Inhibitors C Co-enzymes D Epimers.

✅ Correct Answer: 3

91 Which of the following is an example of globular protein ?

A Myosin B Collagen C Keratin D Haemoglobin

✅ Correct Answer: 4

92 The disease phenyl ketone urea is caused by the deficiency of .

A Acetophenone B Phenyl acetone C Triosinase D Phenylalanine hydroxylase

✅ Correct Answer: 4

93 An example of zwitter ion is

A Glucine hydrochloride B Ammonium acetate C Aniline D Alanine.

✅ Correct Answer: 4

94 The destruction of the biological nature and activity of proteins by heat or chemical gaent is called

A dehydration B denaturation C denitrogenation D deammination.

✅ Correct Answer: 2

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IIT JEE CHEMISTRY Biomolecules And Biological Processes