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NEET Biomolecules (B) PYQs with Solutions

572 previous year questions from Biomolecules (B) (NEET UG Botany) with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

572 questionsBotany2002–2023Answers + solutions

About Biomolecules (B) PYQs

Biomolecules (B) has 572 previous year questions in the Quantrex Academy NEET UG Botany bank. The 220 questions in this list come from NEET (157), JIPMER (40) and AIIMS (23), spanning 2002 to 2023. Each question opens on its own page with the options, the correct answer and the worked solution where available.

Questions by year (this list)

  • 2023: 1
  • 2019: 2
  • 2018: 7
  • 2017: 3
  • 2015: 7
  • 2014: 7
  • 2013: 5
  • 2012: 3
  • 2011: 3
  • 2010: 3
  • 2008: 8
  • 2007: 4

Biomolecules (B) questions with solutions

1

Which of the following is the most abundant protein in the whole of the biosphere?

NEET 2023 Solution
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2

Among the following choose the correct epimers.

JIPMER 2019 Solution
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3

Citrulline structure

JIPMER 2019 Solution
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4

Which of the following is not a derivative of cholesterol?

AIIMS 2018 Solution
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5

In which one of the following sets of three items each belong to the category mentioned against them?

AIIMS 2018 Solution
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6

Which of the following is not a derivative of cholesterol?

JIPMER 2018 Solution
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7

Which is the 21 st amino acid?

JIPMER 2018 Solution
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8

Proteins are needed in diet because

JIPMER 2018 Solution
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9

Non-essential amino acid is

JIPMER 2018 Solution
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10

Omega 3 fatty acid is present in

JIPMER 2018 Solution
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11

Match the tissues/molecules mentioned in column I with those of their degrading enzymes mentioned in column II and select the correct option from the given codes.

AIIMS 2017 Solution
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12

Assertion: Secondary metabolites are produced in small quantities and their extraction from the plant is difficult and expensive. Reason : Secondary metabolites can be

AIIMS 2017 Solution
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13

Macromolecule chitin is

JIPMER 2017 Solution
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14

Match Column - I with Column - II and select the correct option from codes given below.

AIIMS 2015 Solution
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15

Assertion : Secondary metabolites are produced in small quantities and their extraction from the plant is difficult and expensive. Reason: Secondary metabolites can be

AIIMS 2015 Solution
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16

Cholesterol is a precursor for each of the following except

AIIMS 2015 Solution
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17

What base is responsible for hot spots for spontaneous point mutations?

JIPMER 2015 Solution
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18

If the free energy change of a reaction is greater than zero, then the reaction is

JIPMER 2015 Solution
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19

Match the biological molecule listed under column I with their biological function listed under column II. Choose the answer which gives correct combination of alphabets of the

JIPMER 2015 Solution
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20

The enzyme hexokinase which catalysis glucose to a glucose-6-phosphate in glycolysis is inhibited by glucose-6-phosphate. This is an example of I. competitive inhibition II.

JIPMER 2015 Solution
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21

Match the enzyme in column I with its function in column II and choose the correct option. Column I Column II A. β-galactosidase 1. Joining of DNA fragments B. Permease 2. Peptide

JIPMER 2014 Solution
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22

Which of the following represent uridylic acid?

JIPMER 2014 Solution
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23

The statement All biological catalysts are proteins is no longer valid after the discovery of

JIPMER 2014 Solution
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24

Many elements are found in living organisms either free or in form of compounds. One of the following is negligible is living organisms

JIPMER 2014 Solution
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25

Given below is the chemical formula of

JIPMER 2014 Solution
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26

Phage genome site on bacterial chromosome resulted in the structure

JIPMER 2014 Solution
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27

Jacob and Monod named some enzymes as allosteric whose activity is regulated by

JIPMER 2014 Solution
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28

From the following groups, select the one which has only secondary metabolites?

AIIMS 2013 Solution
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29

Assertion : All proteinecous enzymes have a three-dimensional structure. Reason : The secondary structure of protein is according to amino acid present inside the polypeptides.

AIIMS 2013 Solution
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30

Which one out of (a) to (d) given below correctly represents the structural formula of the basic amino acid?

JIPMER 2013 Solution
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31

Which one of the following structural formula of two organic compounds is correctly identified along with its related function?

JIPMER 2013 Solution
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32

Lactose is composed of

JIPMER 2013 Solution
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33

Select the option having all correctly matched pairs. A. Alkaloids (i) Carotenoid; Anthocyanin B. Pigments (ii) Vinblastin; curcumin C. Drugs (iii) Morphine; Codeine

AIIMS 2012 Solution
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34

In a normal adult, ascending order of concentration of following molecules is

AIIMS 2012 Solution
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35

Nucleotides are formed by

JIPMER 2012 Solution
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36

Assertion : Glycerides are important nutrients for body. Reason : Glycerides are hydrolysed into glycerol and fatty acids which are further absorbed in intestine by the formation

AIIMS 2011 Solution
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37

Assertion : Enzymes lower down the activation energy of the reactant molecule to make its transition into product easier. Reason : Enzymes are highly substrate specific catalysts.

AIIMS 2011 Solution
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38

An example of competitive inhibition of an enzyme is the inhibition of

JIPMER 2011 Solution
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39

During strenuous exercise, glucose is converted into

JIPMER 2010 Solution
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40

Which one is component of Ornithine cycle?

JIPMER 2010 Solution
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41

Which of the following amino acids is not optically active?

JIPMER 2010 Solution
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42

Enzymes, vitamins and hormones can be classified into a single category of biological chemicals because of all of these

AIIMS 2008 Solution
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43

Assertion : Competitive inhibitor is also called as substrate analogue. Reason : It resembles the enzymes in structure.

AIIMS 2008 Solution
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44

There was so much......material in the speech that it was difficult to know what the speaker wanted to say.

JIPMER 2008 Solution
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45

Paragraph: Read the following passage carefully and answer the questions given below it. Journalism combines writing with news gathering and interpretation. While the journalist's

JIPMER 2008 Solution
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46

Cell theory was proposed by

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47

Pneumatic bones are expected to be found in

JIPMER 2008 Solution
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48

The back bone of RNA consists of which of the following sugar?

JIPMER 2008 Solution
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49

Which of the following is not a pyrimidine ?

JIPMER 2008 Solution
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50

An example of competitive inhibition of an enzyme is the inhibition of

AIIMS 2007 Solution
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51

Which of the following contain \(β-1,4\) linkage?

AIIMS 2007 Solution
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52

Carbohydrates, the most abundant biomolecules on earth, are produced by:

JIPMER 2007 Solution
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53

Which of the following is the simplest amino acid?

JIPMER 2007 Solution
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54

The figure given below shows three velocitysubstrate concentration curves for an enzyme reaction. What do the curves a, b , and c depict respectively?

AIIMS 2006 Solution
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55

A nucleotide is a molecule consisting of a :

JIPMER 2006 Solution
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56

Non-protein part of enzyme is known as :

JIPMER 2006 Solution
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57

In DNA, which is absent?

JIPMER 2006 Solution
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58

Which one of the following statements regarding enzyme inhibition is correct?

AIIMS 2005 Solution
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59

The basic unit of chitin is

JIPMER 2004 Solution
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60

Arachidonic acid is

JIPMER 2004 Solution
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61

Continued consumption of a diet rich in butter, red meat and eggs for a long period may lead to:

AIIMS 2003 Solution
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62

An example of competitive inhibition of an enzyme is the inhibition of:

AIIMS 2003 Solution
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63

Assertion : Living organisms are regarded as closed systems. Reason : Energy of living organisms cannot be lost or gained from the environment.

AIIMS 2002 Solution
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64

Assertion : Study of biology requires basic knowledge of chemistry and physics. Reason : Living organisms are made up of atoms and molecules which follow chemical and physical

AIIMS 2002 Solution
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65

What are proteins made of?

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66

What is the source of essential amino acids for humans?

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67

What is the most abundant protein in the animal world?

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68

What is the common feature of all compounds found in the acid soluble pool?

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69

What is the difference between micromolecules and biomacromolecules?

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70

Why are lipids considered part of the macromolecular fraction?

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71

What is the acid soluble pool representative of?

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72

What are biomolecules commonly referred to as?

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73

What is the difference between primary and secondary metabolites?

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74

What are some examples of secondary metabolites that are useful to human welfare?

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75

Do secondary metabolites have any ecological importance?

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76

What is the main characteristic of lipids?

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77

What is the R group in a fatty acid?

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78

Where are phospholipids found in the body?

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79

What type of fatty acid has 16 carbon atoms including the carboxyl carbon?

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80

What type of lipid is found in cell membranes?

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81

What is the ionizable nature of amino acids?

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82

What are the three functional groups of amino acids?

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83

What is the R group in proteinaceous amino acids?

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84

How many types of amino acids occur in proteins?

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85

What type of elements are found in the ash?

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86

What type of compounds can be seen in the acid-soluble fraction?

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87

What is the purpose of elemental analysis?

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88

What is the purpose of extracting compounds from living tissues?

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89

What is the purpose of analyzing the isolated compound?

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90

What is the term used for carbon compounds obtained from living tissues?

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91

What is the purpose of burning the tissue?

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92

What is the term used for the remaining material after the tissue is dried?

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93

What is obtained from straining the thick slurry obtained from grinding living tissue in trichloroacetic acid using a mortar and pestle?

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94

What is the process of finding the type of organic compounds found in living organisms called?

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95

What is the result of straining the slurry through a cheesecloth or cotton?

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96

Which of the following is true about the elements present in a sample of earth's crust and living tissue?

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97

What is the non-reducing end of a polysaccharide chain?

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98

What is the color of starch-I 2 ?

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99

What is the reducing end of a polysaccharide chain?

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100

What is glycogen in animals?

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101

What is the function of starch in plants?

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102

What is cellulose?

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103

What are polysaccharides?

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104

What type of bond links amino acids in a polypeptide or a protein?

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105

What type of bond links individual monosaccharides in a polysaccharide?

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106

What type of bond links the 3’-carbon of one sugar of one nucleotide to the 5’-carbon of the sugar of the succeeding nucleotide in a nucleic acid?

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107

What is the famous Watson-Crick model for DNA?

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108

What is the direction of the two strands of polynucleotides in DNA according to the Watson-Crick model?

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109

What is the backbone of DNA in the Watson-Crick model formed by?

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110

What do A and G of one strand of DNA compulsorily base pair with?

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111

How many hydrogen bonds are there between A and T in DNA?

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112

How many base pairs does one full turn of the helical strand in DNA involve?

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113

What is the pitch of B-DNA?

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114

What is the rise per base pair in B-DNA?

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115

What is an active site in an enzyme?

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116

What type of Biomolecule is an enzyme?

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117

What is the difference between enzyme catalysts and inorganic catalysts?

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118

What is thermal stability in enzymes?

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119

Can enzymes isolated from thermophilic organisms retain their catalytic power at high temperatures?

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120

What is the purpose of the formation of the ‘ES’ complex?

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