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Biomolecules — NEET UG Chemistry PYQs

1,038 previous year questions from Biomolecules with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

1,038 questionsChemistrySolutions on every page
1

What type of sugar is the stachyose?

MHT CET Medical 2026 Solution View → 2

What is the number of stereo structure of glucose?

MHT CET Medical 2026 Solution View → 3

Which of the following is having largest size?

MHT CET Medical 2026 Solution View → 4

Which of the following is non reducing sugar?

MHT CET Medical 2026 Solution View → 5

Which of the following exists as a zwitter ion ?

MHT CET Medical 2026 Solution View → 6

Which of the following is a disaccharide ?

MHT CET Medical 2026 Solution View → 7

Name the polymer in which chains are formed by -1,4-glycosidic linkages between -glucose units and branches are formed by -1,6-glycosidic linkages.

MHT CET Medical 2026 Solution View → 8

Match List I with List II List I (CARBOHYDRATE) List II (TYPE) (A). Glycogen (I). Oligosaccharide (B). Stachyose (II). Monosaccharide (C). Ribose (III). Polysaccharide Choose the c

MHT CET Medical 2026 Solution View → 9

What is monomer used in cellulose, a straight chain polysaccharide?

MHT CET Medical 2026 Solution View → 10

Which of the following reagents is used to identify one primary alcoholic group of glucose?

MHT CET Medical 2026 Solution View → 11

Identify the product formed when glucose is oxidized with concentrated nitric acid

MHT CET Medical 2026 Solution View → 12

Which from following statements regarding biological importance of elements is NOT true?

MHT CET Medical 2026 Solution View → 13

What type of following peptides, the glycylalanine is?

MHT CET Medical 2026 Solution View → 14

Why does fructose reduce Fehling's solution?

MHT CET Medical 2026 Solution View → 15

What type of compound the Keratin is?

MHT CET Medical 2026 Solution View → 16

Formation of saccharic acid from glucose by oxidation with dilute HNO ₃ , confirms

MHT CET Medical 2026 Solution View → 17

Identify glycosidic linkage present in maltose.

MHT CET Medical 2026 Solution View → 18

Which of the following compounds is obtained when glucose is heated with HI for a prolonged ?

MHT CET Medical 2026 Solution View → 19

Identify the product formed when glucose is treated with dil. HNO ₃ .

MHT CET Medical 2026 Solution View → 20

Which of the following is Zwitter ion of sulphanilic acid?

MHT CET Medical 2026 Solution View → 21

Identify the structure of alanine when pH is 11 .

MHT CET Medical 2026 Solution View → 22

Identify the amino acid, NOT having nitrogen atom in a side chain.

MHT CET Medical 2026 Solution View → 23

Most common secondary structure of protein Myosin in muscle and -keratin in hair are,

MHT CET Medical 2026 Solution View → 24

Identify the functional group / groups found in amino acid.

MHT CET Medical 2026 Solution View → 25

Which of the following statements regarding fats is NOT true?

MHT CET Medical 2026 Solution View → 26

Identify the name of above nitrogen base.

MHT CET Medical 2026 Solution View → 27

O ₂ gas has very low solubility in water. However, its solubility in blood is excessively high. This is because of

MHT CET Medical 2026 Solution View → 28

Which from followings is true regarding structure of glucopyranose ?

MHT CET Medical 2026 Solution View → 29

Identify the correct statements about biomolecules. A. Lipids are generally water soluble. B. Proteins are polypeptides. C. Polysaccharides are long chains of sugars. D. Adenine an

NEET 2026 Solution View → 30

The amino acid that gives a red-blood colour on treating its sodium fusion extract with sodium nitroprusside is

NEET 2026 Solution View → 31

The correct statement with regard to the secondary structure of DNA/RNA is :

NEET 2026 Solution View → 32

Which of the following statements are correct regarding amino acids ? A. They are substituted methanes. B. Serine is an aromatic amino acid. C. Valine is a neutral amino acid. D. L

NEET 2026 Solution View → 33

Match the vitamins in List I with their sources in List II List I List II A. vitamin A I. meat B. vitamin B₁₂ II. sunflower oil C. vitamin E III. green leafy vegetables D. vitamin

NEET 2026 Solution View → 34

The correct statement about peptides and proteins is

NEET 2026 Solution View → 35

Alpha-helix is found in which level of protein structure ?

NEET 2026 Solution View → 36

The following reaction depicts the activity of a particular class of enzymes : Identify the enzyme class 'E' from the following options :

NEET 2026 Solution View → 37

Match List I with List II : List I List II A. Trypsin I. Intercellular ground substance B. Morphine II. Lectin C. Concanavalin A III. Enzyme D. Collagen IV. Alkaloid Choose the cor

NEET 2026 Solution View → 38

Which one of the following enzymes contains 'Haem' as the prosthetic group?

NEET 2025 Solution View → 39

Match List I with List II: array |l|l|l|l| & List - I & & List - II A . & Adenosine & (i) & Nitrogen base B. & Adenylic acid & (ii) & Nucleotide C. & Adenine & (iii) & Nucleoside D

NEET 2025 Solution View → 40

The protein portion of an enzyme is called:

NEET 2025 Solution View → 41

Why can't insulin be given orally to diabetic patients?

NEET 2025 Solution View → 42

Match List - I with List-II array llll & array l List-I (Name of the array & & array l List-II (Deficiency array & Vitamin) & & array l disease) array A. & Vitamin B₁₂ & I. & Cheil

NEET 2025 Solution View → 43

Sugar 'X' A. is found in honey. B. is a keto sugar. C. exists in and - anomeric forms. D. is laevorotatory. ' X ' is :

NEET 2025 Solution View → 44

Name the class of enzyme that usually catalyze the following reaction : S - G + S ^ # ~S + S ^ # - G Where, G a group other than hydrogen S a substrate S ^ # another substrate

NEET 2025 Solution View → 45

Given below are two statements : Statement I: Glycogen is similar to amylose in its structure. Statement II : Glycogen is| found in yeast and fungi also. In the light of the above

NEET 2024 Solution View → 46

The reagents with which glucose does not react to give the corresponding tests/products are A. Tollen's reagent B. Schiff's reagent C. HCN D. NH ₂ OH E. NaHSO ₃ Choose the correct

NEET 2024 Solution View → 47

Cheilosis occurs due to deficiency of

NEET 2023 Solution View → 48

Given below are two statements : Statement I: A unit formed by the attachment of a base to 1 ' position of sugar is known as nucleoside Statement II: When nucleoside is linked to p

NEET 2023 Solution View → 49

The incorrect statement about denaturation of proteins is

NEET 2022 Solution View → 50

The incorrect statement regarding enzymes is:

NEET 2022 Solution View → 51

The RBC deficiency is deficiency disease of:

NEET 2021 Solution View → 52

The reaction of concentrated sulphuric acid with carbohydrates C 12 H 22 O 11 is an example of

NEET 2020 Solution View → 53

Deficiency of which vitamin causes osteomalacia?

NEET 2020 Solution View → 54

Which of the following statement is not true about glucose?

NEET 2020 Solution View → 55

Sucrose on hydrolysis gives

NEET 2020 Solution View → 56

Which of the following is a basic amino acid?

NEET 2020 Solution View → 57

Which of the following act as epimeric pair?

JIPMER 2019 Solution View → 58

Invert sugar is mixture of

JIPMER 2019 Solution View → 59

Which structure(s) of proteins remains(s) intact during denaturation process?

NEET 2019 Solution View → 60

The non-essential amino acid among the following is:

NEET 2019 Solution View → 61

Which one of the following represents the correct structure of cellulose?

JIPMER 2018 Solution View → 62

Which of the following compounds can form a zwitter ion?

NEET 2018 Solution View → 63

What is the difference between amylose and amylopectin?

NEET 2018 Solution View → 64

On hydrolysis of starch, we finally get

JIPMER 2017 Solution View → 65

Which of the following statements is not correct?

NEET 2017 Solution View → 66

Sugars are seperated by using the solvent BAW ( n -butanol acetic acid - H ₂ O ) and detected by spraying the plate with

JIPMER 2016 Solution View → 67

Which one of the following compounds shows the presence of intramolecular hydrogen bond?

NEET 2016 Solution View → 68

The central dogma of molecular genetics states that the genetic information flows from:

NEET 2016 Solution View → 69

The correct corresponding order of names of four aldoses with configuration given below respectively, is

NEET 2016 Solution View → 70

In a protein molecule various amino acids are linked together by:

NEET 2016 Solution View → 71

The correct statement regarding RNA and DNA, respectively is:

NEET 2016 Solution View → 72

Which one given below is a non-reducing sugar?

NEET 2016 Solution View → 73

In an amino acid, the carboxyl group ionises at p K_ a₁ =2.34 and ammonium ion at p K_ a₂ =9.60 . The isoelectric point of the amino acid is at pH

JIPMER 2015 Solution View → 74

What percentage of -D-(+)-glucopyranose is found at equilibrium in the aqueous solution?

JIPMER 2015 Solution View → 75

In DNA, the complimentary bases are

JIPMER 2014 Solution View → 76

D ( + ) glucose reacts with hydroxyl amine and yield an oxime. The structure of the oxime would be:

NEET 2014 Solution View → 77

The deficiency of vitamin C causes

JIPMER 2013 Solution View → 78

In DNA the linkages between different nitrogenous bases are:

NEET 2013 Solution View → 79

Deficiency of vitamin B₁ causes the disease

NEET 2012 Solution View → 80

Which one of the following sets of monosaccharides forms sucrose?

NEET 2012 Solution View → 81

Lactose is made of

JIPMER 2011 Solution View → 82

Which one of the following statements is not true regarding (+) lactose?

NEET 2011 Solution View → 83

Which of the following is not a fat soluble vitamin?

NEET 2011 Solution View → 84

Which of the statements about 'Denaturation' given below are correct? Statements (A) Denaturation of proteins causes loss of secondary and tertiary structures of the protein. (B) D

NEET 2011 Solution View → 85

The general molecular formula for disaccharide is

JIPMER 2010 Solution View → 86

Which one of the following proteins transports oxygen in the blood stream?

JIPMER 2010 Solution View → 87

Proteins are composed of

JIPMER 2010 Solution View → 88

Which one of the following does not exhibit the phenomenon of mutarotation?

NEET 2010 Solution View → 89

Fructose reduces Tollen's reagent due to

NEET 2010 Solution View → 90

The segment of DNA, which acts as the instrumental manual for the synthesis of the protein is

NEET 2009 Solution View → 91

The state of hybridization of C ₂, C ₃, C ₅ and C ₆ of the hydrocarbon - is in the following sequence :

NEET 2009 Solution View → 92

Which of the following is not reducing sugar ?

JIPMER 2008 Solution View → 93

The enzyme which can catalyse the conversion of glucose to ethanol is

JIPMER 2008 Solution View → 94

The dissociation equilibrium of a gas A B₂ can be represented as 2 A B₂(g) 2 A B(g)+B₂(g) The degree of dissociation is ' x ' and is small compared to 1. The expression relating th

NEET 2008 Solution View → 95

In DNA, the complimentary bases are

NEET 2008 Solution View → 96

Which one of the following is an amine hormone?

NEET 2008 Solution View → 97

The values of (K_ p₁ ) and (K_ p₂ ) for the reactions (X Y+Z ) ...(i) and (A 2 B ) ...(ii) are in ratio of (9: 1 ). If degree of dissociation of (X ) and (A ) be equal, then total

NEET 2008 Solution View → 98

Which functional group participates in disulphide bond formation in proteins?

JIPMER 2007 Solution View → 99

RNA and DNA are chiral molecules, their chirality is due to:

NEET 2007 Solution View → 100

Which of the following vitamins is water soluble?

NEET 2007 Solution View → 101

Which of the following amino acid is optically inactive?

JIPMER 2006 Solution View → 102

Glucose has difference from fructose in that it:

JIPMER 2006 Solution View → 103

The human body does not produce:

NEET 2006 Solution View → 104

Which one of the following is a peptide hormone?

NEET 2006 Solution View → 105

Which functional group participates in disulphide bond formation in proteins?

NEET 2005 Solution View → 106

The cell membranes are mainly composed of:

NEET 2005 Solution View → 107

Which of the following structures represents the peptide chain?

NEET 2004 Solution View → 108

A sequence of how many nucleotides in messenger RNA makes a codon for an amino acid?

NEET 2004 Solution View → 109

The hormone that helps in the conversion of glucose to glycogen is:

NEET 2004 Solution View → 110

The correct statement in respect of protein haemoglobin is that it:

NEET 2004 Solution View → 111

Number of chiral carbon in -D-(+) glucose is:

NEET 2004 Solution View → 112

The helical structure of protein is stabilized by:

NEET 2004 Solution View → 113

Vitamin B₁₂ contains:

NEET 2003 Solution View → 114

Chargaff's rule states that in an organism

NEET 2003 Solution View → 115

Cellulose is a polymer of:

NEET 2002 Solution View → 116

Which of the following statement(s) is incorrect?

NEET 2002 Solution View → 117

Pellagra is a condition associated with the deficiency of which vitamin?

NEET Solution View → 118

Which type of RNA is involved in the processing and splicing of pre-mRNA in eukaryotic cells?

NEET Solution View → 119

What is the process by which HI reacts with an alkane to form a straight-chain hydrocarbon?

NEET Solution View → 120

What is the structural similarity between glycogen and amylopectin?

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