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JEE Main

Biomolecules

Chemistry

Previous Years Questions

MCQ (Single Correct Answer)

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The formulas of A and B for the following reaction sequence are...
JEE Main 2022 (Online) 28th July Evening Shift
Two statements in respect of drug-enzyme interaction are given below Statement I : Action of an enzyme can be blocked on...
JEE Main 2022 (Online) 28th July Evening Shift
For the below given cyclic hemiacetal (X), the correct pyranose structure is : ...
JEE Main 2022 (Online) 28th July Morning Shift
Match List - I with List - II. .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style...
JEE Main 2022 (Online) 28th July Morning Shift
Match List - I with Match List - II. .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border...
JEE Main 2022 (Online) 27th July Evening Shift
A sugar 'X' dehydrates very slowly under acidic condition to give furfural which on further reaction with resorcinol giv...
JEE Main 2022 (Online) 27th July Morning Shift
Animal starch is the other name of
JEE Main 2022 (Online) 26th July Evening Shift
Which one of the following is a reducing sugar?
JEE Main 2022 (Online) 26th July Morning Shift
Glycosidic linkage between C1 of $$\alpha$$-glucose and C2 of $$\beta$$-fructose is found in
JEE Main 2022 (Online) 25th July Evening Shift
During the denaturation of proteins, which of these structures will remain intact?
JEE Main 2022 (Online) 25th July Morning Shift
The sugar produced after complete hydrolysis of DNA is
JEE Main 2022 (Online) 30th June Morning Shift
Match List-I with List-II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:soli...
JEE Main 2022 (Online) 26th June Evening Shift
A chemical which stimulates the secretion of pepsin is :
JEE Main 2022 (Online) 26th June Morning Shift
Given below are two statements. Statement I : Maltose has two $$\alpha$$-D-glucose units linked at C1 and C4 and is a re...
JEE Main 2022 (Online) 27th June Evening Shift
When sugar 'X' is boiled with dilute H2SO4 in alcoholic solution, two isomers 'A' and 'B' are formed. 'A' on oxidation w...
JEE Main 2022 (Online) 28th June Evening Shift
The structure of protein that is unaffected by heating is
JEE Main 2022 (Online) 29th June Evening Shift
Sugar moiety in DNA and RNA molecules respectively are
JEE Main 2022 (Online) 29th June Morning Shift
Which of the following is not an example of fibrous protein?
JEE Main 2021 (Online) 31st August Evening Shift
Which one of the following compounds contains $$\beta$$-C1-C4 glycosidic linkage?
JEE Main 2021 (Online) 31st August Morning Shift
Hydrolysis of sucrose gives :
JEE Main 2021 (Online) 27th August Evening Shift
Out of following isomeric forms of uracil, which one is present in RNA?
JEE Main 2021 (Online) 27th August Morning Shift
Given below are two statements : one is labelled as Assertion (A) and other is labelled as Reason (R). Assertion (A) : S...
JEE Main 2021 (Online) 26th August Evening Shift
Compound A gives D-Galactose and D-Glucose on hydrolysis. The compound A is :
JEE Main 2021 (Online) 27th July Evening Shift
Which one among the following chemical tests is used to distinguish monosaccharide from disaccharide?
JEE Main 2021 (Online) 27th July Morning Shift
Which one of the following is correct structure for cytosine?
JEE Main 2021 (Online) 25th July Evening Shift
The water soluble protein is :
JEE Main 2021 (Online) 25th July Morning Shift
Which one of the following statements is not true about enzymes?
JEE Main 2021 (Online) 20th July Evening Shift
Deficiency of vitamin K causes :
JEE Main 2021 (Online) 18th March Evening Shift
A non-reducing sugar "A" hydrolyses to give two reducing mono saccharides. Sugar A is
JEE Main 2021 (Online) 18th March Morning Shift
Fructose is an example of :
JEE Main 2021 (Online) 17th March Evening Shift
The secondary structure of protein is stabilised by:
JEE Main 2021 (Online) 16th March Evening Shift
Seliwanoff test and Xanthoproteic test are used for the identification of ___________ and ________ respectively.
JEE Main 2021 (Online) 26th February Evening Shift
Match List - I with List - II. List - I List - II (a) Sucrose (i) $$\beta...
JEE Main 2021 (Online) 26th February Evening Shift
Which of the following is correct structure of $$\alpha$$-anomer of maltose?
JEE Main 2021 (Online) 25th February Evening Shift
Which of the glycosidic linkage between galactose and glucose is present in lactose?
JEE Main 2021 (Online) 25th February Morning Slot
Out of the following, which type of interaction is reponsible for the stabilisation of $$\alpha $$-helix structure of pr...
JEE Main 2021 (Online) 24th February Morning Slot
Which one of the following statements is not true?
JEE Main 2020 (Online) 6th September Evening Slot
Which of the following is not an essential amino acid :
JEE Main 2020 (Online) 5th September Morning Slot
What are the functional groups present in the structure of maltose?
JEE Main 2020 (Online) 4th September Morning Slot
Consider the following rections: 'x', 'y' and 'z' in these reactions are respectively....
JEE Main 2020 (Online) 2nd September Morning Slot
A, B and C are three biomolecules. The results of the tests performed on them are given below: A, B and C are respectiv...
JEE Main 2020 (Online) 9th January Evening Slot
Two monomers in maltose are :
JEE Main 2020 (Online) 8th January Evening Slot
Which of the following statement is not true for glucose?
JEE Main 2020 (Online) 8th January Morning Slot
Which of the following statements is correct ?
JEE Main 2020 (Online) 7th January Evening Slot
Which of the given statements is INCORRECT about glycogen?
JEE Main 2019 (Online) 12th April Evening Slot
Which of the following statements is not true about RNA?
JEE Main 2019 (Online) 12th April Morning Slot
Glucose and Galactose are having identical configuration in all the positions except position.
JEE Main 2019 (Online) 12th April Morning Slot
Number of stereo centers present in linear and cyclic structures of glucose are respectively :
JEE Main 2019 (Online) 10th April Evening Slot
Amylopectin is compound of :
JEE Main 2019 (Online) 10th April Morning Slot
The peptide that gives positive ceric ammonium nitrate and carbylamine tests is :
JEE Main 2019 (Online) 9th April Evening Slot
Which of the following statements is not true about sucrose?
JEE Main 2019 (Online) 9th April Morning Slot
Fructose and glucose can be distinguished by :
JEE Main 2019 (Online) 8th April Evening Slot
Maltose on treatment with dilute HCI gives :
JEE Main 2019 (Online) 8th April Morning Slot
The correct structure of histidine in a strongly acidic solution (pH = 2) is -
JEE Main 2019 (Online) 12th January Evening Slot
Among the following compounds most basic amino acid is -
JEE Main 2019 (Online) 12th January Morning Slot
Among the following compounds, which one is found in RNA ?
JEE Main 2019 (Online) 11th January Morning Slot
Which of the following tests cannot be used for identifying amino acids?
JEE Main 2019 (Online) 10th January Evening Slot
The correct structure of product 'P' in the following reactions is : ...
JEE Main 2019 (Online) 10th January Morning Slot
The correct sequence of amino acids present in the tripeptide given below is : ...
JEE Main 2019 (Online) 9th January Evening Slot
The increasing order of pka of the following amino acids in aqueous solution is : Gly Asp Lys Arg
JEE Main 2019 (Online) 9th January Morning Slot
Among the following, the incorrect statement is :
JEE Main 2018 (Online) 16th April Morning Slot
The dipeptide, Gln-Gly, on treatment with CH3COCl followed y aqueous work up gives :
JEE Main 2018 (Online) 15th April Evening Slot
Which of the following will not exist in zwitter ionic form at pH=7 ?
JEE Main 2018 (Online) 15th April Morning Slot
Which of the following is the corect structure of Adenosine?
JEE Main 2018 (Online) 15th April Morning Slot
The predominant form of histamine present in human blood is (pKa, Histidine = 6.0)
JEE Main 2018 (Offline)
Glucose on prolonged heating with HI gives
JEE Main 2018 (Offline)
The incorrect statement among the following is :
JEE Main 2017 (Online) 9th April Morning Slot
Among the following, the essential amino acid is :
JEE Main 2017 (Online) 8th April Morning Slot
Which of the following compounds will behave as a reducing sugar in an aqueous KOH solution?
JEE Main 2017 (Offline)
Observation of “Rhumann’s purple” is a confirmatory test for the presence of :
JEE Main 2016 (Online) 10th April Morning Slot
Consider the following sequence for aspartic acid : The pI (isoelectric point) of aspartic acid is :...
JEE Main 2016 (Online) 9th April Morning Slot
Thiol group is present in :
JEE Main 2016 (Offline)
Which of the vitamins given below is water soluble?
JEE Main 2015 (Offline)
Which one of the following bases is not present in DNA?
JEE Main 2014 (Offline)
Synthesis of each molecule of glucose in photosynthesis involves:
JEE Main 2013 (Offline)
Which one of the following statements is correct ?
AIEEE 2012
Which of the following compounds can be detected by Molisch’s test ?
AIEEE 2012
The presence or absence of hydroxyl group on which carbon atom of sugar differentiates RNA and DNA ?
AIEEE 2011
The two functional groups present in a typical carbohydrate are
AIEEE 2009
$$\alpha$$-D-(+)-glucose and $$\beta$$-D-(+)-glucose are
AIEEE 2008
The secondary structure of a protein refers to
AIEEE 2007
The pyrimidine bases present in DNA are
AIEEE 2006
The term anomers of glucose refers to
AIEEE 2006
In both DNA and RNA, heterocyclic base and phosphate ester linkages are at-
AIEEE 2005
Insulin production and its action in human body are responsible for the level of diabetes. This compound belongs to whic...
AIEEE 2004
Which base is present in RNA but not in DNA?
AIEEE 2004
Identify the correct statements regarding enzymes
AIEEE 2004
The reason for double helical structure of $$DNA$$ is operation of
AIEEE 2003
Complete hydrolysis of cellulose gives
AIEEE 2003
RNA is different from DNA because RNA contains
AIEEE 2002
The functional group, which is found in amino acid is
AIEEE 2002

Numerical

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In alanylglycylleucylalanylvaline, the number of peptide linkages is ___________.
JEE Main 2022 (Online) 24th June Evening Shift
The number of oxygens present in a nucleotide formed from a base, that is present only in RNA is ___________.
JEE Main 2022 (Online) 26th June Morning Shift
The total number of negative charge in the tetrapeptide, Gly-Glu-Asp-Tyr, t pH 12.5 will be ______________. (Integer ans...
JEE Main 2021 (Online) 26th August Morning Shift
The number of chiral carbons present in sucrose is _____.
JEE Main 2020 (Online) 5th September Evening Slot
The number of chiral carbon(s) present in peptide, Ile-Arg-Pro, is _____.
JEE Main 2020 (Online) 5th September Morning Slot
The number of groups present in a tripeptide Asp–Glu–Lys is ____....
JEE Main 2020 (Online) 3rd September Evening Slot

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