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MCQ (Single Correct Answer)

JEE Main 2024 (Online) 9th April Evening Shift
The incorrect statement about Glucose is :
JEE Main 2024 (Online) 1st February Morning Shift
If one strand of a DNA has the sequence ATGCTTCA, sequence of the bases in complementary strand is :
JEE Main 2024 (Online) 31st January Morning Shift
Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family...
JEE Main 2024 (Online) 30th January Morning Shift
Sugar which does not give reddish brown precipitate with Fehling's reagent, is :
JEE Main 2024 (Online) 29th January Evening Shift
Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family...
JEE Main 2024 (Online) 29th January Morning Shift
Type of amino acids obtained by hydrolysis of proteins is :
JEE Main 2024 (Online) 27th January Evening Shift
Which structure of protein remains intact after coagulation of egg white on boiling?
JEE Main 2024 (Online) 27th January Morning Shift
Two nucleotides are joined together by a linkage known as :
JEE Main 2023 (Online) 15th April Morning Shift
Which is not true for arginine?
JEE Main 2023 (Online) 13th April Evening Shift
The naturally occurring amino acid that contains only one basic functional group in its chemical structure is
JEE Main 2023 (Online) 13th April Morning Shift
The products formed in the above reaction are...
JEE Main 2023 (Online) 11th April Morning Shift
L-isomer of tetrose $$\mathrm{X}\left(\mathrm{C}_{4} \mathrm{H}_{8} \mathrm{O}_{4}\right)$$ gives positive Schiff's test and has two chiral carbons. O...
JEE Main 2023 (Online) 10th April Morning Shift
The one that does not stabilize 2$$^\circ$$ and 3$$^\circ$$ structures of proteins is
JEE Main 2023 (Online) 8th April Evening Shift
Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family...
JEE Main 2023 (Online) 8th April Morning Shift
Sulphur (S) containing amino acids from the following are: (a) isoleucine (b) cysteine (c) lysine (d) methionine (e) glutamic acid
JEE Main 2023 (Online) 6th April Evening Shift
Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family...
JEE Main 2023 (Online) 6th April Morning Shift
Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family...
JEE Main 2023 (Online) 1st February Evening Shift
All structures given below are of vitamin C. Most stable of them is :
JEE Main 2023 (Online) 1st February Evening Shift
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : $$\alpha$$-halocarboxylic a...
JEE Main 2023 (Online) 1st February Morning Shift
The correct representation in six membered pyranose form for the following sugar [X] is ...
JEE Main 2023 (Online) 1st February Morning Shift
Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family...
JEE Main 2023 (Online) 31st January Morning Shift
A protein '$$\mathrm{X}$$' with molecular weight of $$70,000 \mathrm{~u}$$, on hydrolysis gives amino acids. One of these amino acid is
JEE Main 2023 (Online) 30th January Morning Shift
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Ketoses give Seliwanoff's t...
JEE Main 2023 (Online) 29th January Evening Shift
Following tetrapeptide can be represented as (F, L, D, Y, I, Q, P are one letter codes for amino acids)...
JEE Main 2023 (Online) 29th January Morning Shift
Number of cyclic tripeptides formed with 2 amino acids A and B is :
JEE Main 2023 (Online) 25th January Morning Shift
Match items of Row I with those of Row II. Row I : Row II : (i) $$\alpha$$-$$\mathrm{D}$$-$$(-)$$-$$\mathrm{Fructofuranose}$$ (ii) $$\beta$$-D-$$(-)$...
JEE Main 2022 (Online) 29th July Evening Shift
Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason R. Assertion A: Amylose is insoluble in water. Reas...
JEE Main 2022 (Online) 28th July Evening Shift
The formulas of A and B for the following reaction sequence are...
JEE Main 2022 (Online) 28th July Morning Shift
For the below given cyclic hemiacetal (X), the correct pyranose structure is : ...
JEE Main 2022 (Online) 27th July Evening Shift
Match List - I with Match List - II. .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;...
JEE Main 2022 (Online) 27th July Morning Shift
A sugar 'X' dehydrates very slowly under acidic condition to give furfural which on further reaction with resorcinol gives the coloured product after ...
JEE Main 2022 (Online) 26th July Evening Shift
Animal starch is the other name of
JEE Main 2022 (Online) 26th July Morning Shift
Which one of the following is a reducing sugar?
JEE Main 2022 (Online) 25th July Evening Shift
Glycosidic linkage between C1 of $$\alpha$$-glucose and C2 of $$\beta$$-fructose is found in
JEE Main 2022 (Online) 25th July Morning Shift
During the denaturation of proteins, which of these structures will remain intact?
JEE Main 2022 (Online) 30th June Morning Shift
The sugar produced after complete hydrolysis of DNA is
JEE Main 2022 (Online) 29th June Evening Shift
The structure of protein that is unaffected by heating is
JEE Main 2022 (Online) 29th June Morning Shift
Sugar moiety in DNA and RNA molecules respectively are
JEE Main 2022 (Online) 28th June Evening Shift
When sugar 'X' is boiled with dilute H2SO4 in alcoholic solution, two isomers 'A' and 'B' are formed. 'A' on oxidation with HNO3 yields saccharic acid...
JEE Main 2022 (Online) 28th June Morning Shift
Stability of $$\alpha$$-Helix structure of proteins depends upon
JEE Main 2022 (Online) 27th June Evening Shift
Given below are two statements. Statement I : Maltose has two $$\alpha$$-D-glucose units linked at C1 and C4 and is a reducing sugar. Statement II : M...
JEE Main 2022 (Online) 27th June Morning Shift
L-isomer of a compound 'A' (C4H8O4) gives a positive test with [Ag(NH3)2]+. Treatment of 'A' with acetic anhydride yields triacetate derivative. Compo...
JEE Main 2022 (Online) 26th June Evening Shift
Match List-I with List-II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family...
JEE Main 2022 (Online) 26th June Evening Shift
Which one of the following is a water soluble vitamin, that is not excreted easily?
JEE Main 2022 (Online) 24th June Morning Shift
A polysaccharide 'X' on boiling with dil H2SO4 at 393 K under 2-3 atm pressure yields 'Y'. 'Y' on treatment with bromine water gives gluconic acid. 'X...
JEE Main 2021 (Online) 31st August Evening Shift
Which of the following is not an example of fibrous protein?
JEE Main 2021 (Online) 31st August Morning Shift
Which one of the following compounds contains $$\beta$$-C1-C4 glycosidic linkage?
JEE Main 2021 (Online) 27th August Evening Shift
Hydrolysis of sucrose gives :
JEE Main 2021 (Online) 27th August Morning Shift
Out of following isomeric forms of uracil, which one is present in RNA?
JEE Main 2021 (Online) 26th August Evening Shift
Given below are two statements : one is labelled as Assertion (A) and other is labelled as Reason (R). Assertion (A) : Sucrose is a disaccharide and a...
JEE Main 2021 (Online) 27th July Evening Shift
Compound A gives D-Galactose and D-Glucose on hydrolysis. The compound A is :
JEE Main 2021 (Online) 27th July Morning Shift
Which one among the following chemical tests is used to distinguish monosaccharide from disaccharide?
JEE Main 2021 (Online) 27th July Morning Shift
The compound 'A' is a complementary base of _______________ in DNA stands....
JEE Main 2021 (Online) 25th July Evening Shift
Which one of the following is correct structure for cytosine?
JEE Main 2021 (Online) 25th July Morning Shift
The water soluble protein is :
JEE Main 2021 (Online) 22th July Evening Shift
Thiamine and pyridoxine are also known respectively as :
JEE Main 2021 (Online) 20th July Evening Shift
Which one of the following statements is not true about enzymes?
JEE Main 2021 (Online) 20th July Morning Shift
Identify the incorrect statement from the following
JEE Main 2021 (Online) 18th March Evening Shift
Deficiency of vitamin K causes :
JEE Main 2021 (Online) 18th March Morning Shift
A non-reducing sugar "A" hydrolyses to give two reducing mono saccharides. Sugar A is
JEE Main 2021 (Online) 17th March Evening Shift
$${C_{12}}{H_{22}}{O_{11}} + {H_2}O\buildrel {Enzyme\,A} \over \longrightarrow \mathop {{C_6}{H_{12}}{O_6}}\limits_{Glu\cos e} + \mathop {{C_6}{H_{1...
JEE Main 2021 (Online) 17th March Evening Shift
Fructose is an example of :
JEE Main 2021 (Online) 17th March Morning Shift
Which of the following is correct structure of tyrosine?
JEE Main 2021 (Online) 16th March Evening Shift
The secondary structure of protein is stabilised by:
JEE Main 2021 (Online) 16th March Morning Shift
Which among the following pairs of Vitamins is stored in our body relatively for longer duration?
JEE Main 2021 (Online) 26th February Evening Shift
Match List - I with List - II. List - I List - II (a) Sucrose (i) $$\beta $$-D-Galactose and $$\beta $$...
JEE Main 2021 (Online) 26th February Morning Shift
Which of the following vitamin is helpful in delaying the blood clotting?
JEE Main 2021 (Online) 25th February Evening Shift
Which of the following is correct structure of $$\alpha$$-anomer of maltose?
JEE Main 2021 (Online) 25th February Morning Shift
Which of the glycosidic linkage between galactose and glucose is present in lactose?
JEE Main 2021 (Online) 24th February Evening Shift
Match List - I and List - II. List I List II (a) Valium (i) Antifertility drug (b) Morphin...
JEE Main 2021 (Online) 24th February Morning Shift
Out of the following, which type of interaction is reponsible for the stabilisation of $$\alpha $$-helix structure of proteins ?
JEE Main 2020 (Online) 6th September Evening Slot
Which one of the following statements is not true?
JEE Main 2020 (Online) 5th September Morning Slot
Which of the following is not an essential amino acid :
JEE Main 2020 (Online) 4th September Morning Slot
What are the functional groups present in the structure of maltose?
JEE Main 2020 (Online) 4th September Morning Slot
Which of the following will react with CHCl3 + alc. KOH?
JEE Main 2020 (Online) 2nd September Evening Slot
The correct observation in the following reactions is : ...
JEE Main 2020 (Online) 2nd September Morning Slot
Consider the following rections: 'x', 'y' and 'z' in these reactions are respectively....
JEE Main 2020 (Online) 8th January Evening Slot
Two monomers in maltose are :
JEE Main 2020 (Online) 8th January Morning Slot
Which of the following statement is not true for glucose?
JEE Main 2020 (Online) 7th January Evening Slot
Which of the following statements is correct ?
JEE Main 2020 (Online) 7th January Morning Slot
Match the following : (i) Riboflavin    (a) Beriberi (ii) Thiamine    (b) Scurvy (iii) Pyridoxine   (c) Chelio...
JEE Main 2019 (Online) 12th April Evening Slot
Which of the given statements is INCORRECT about glycogen?
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
Which of the following statements is not true about RNA?
JEE Main 2019 (Online) 10th April Evening Slot
Number of stereo centers present in linear and cyclic structures of glucose are respectively :
JEE Main 2019 (Online) 10th April Morning Slot
Amylopectin is compound of :
JEE Main 2019 (Online) 9th April Evening Slot
The peptide that gives positive ceric ammonium nitrate and carbylamine tests is :
JEE Main 2019 (Online) 9th April Morning Slot
Which of the following statements is not true about sucrose?
JEE Main 2019 (Online) 8th April Evening Slot
Fructose and glucose can be distinguished by :
JEE Main 2019 (Online) 8th April Morning Slot
Maltose on treatment with dilute HCI gives :
JEE Main 2019 (Online) 12th January Evening Slot
The correct structure of histidine in a strongly acidic solution (pH = 2) is -
JEE Main 2019 (Online) 12th January Evening Slot
The correct statement (s) among I to III with respect to potassium ions that are abundant within the cell fluid is /are I. They activate many enzymes...
JEE Main 2019 (Online) 12th January Morning Slot
Among the following compounds most basic amino acid is -
JEE Main 2019 (Online) 11th January Evening Slot
The correct match between Item I and Item II is : .tg {border-collapse:collapse;border-spacing:0;width:100%} .tg td{font-family:Arial, sans-serif;fo...
JEE Main 2019 (Online) 11th January Morning Slot
Among the following compounds, which one is found in RNA ?
JEE Main 2019 (Online) 10th January Evening Slot
Which of the following tests cannot be used for identifying amino acids?
JEE Main 2019 (Online) 10th January Morning Slot
The correct structure of product 'P' in the following reactions is : ...
JEE Main 2019 (Online) 9th January Evening Slot
The correct sequence of amino acids present in the tripeptide given below is : ...
JEE Main 2019 (Online) 9th January Morning Slot
The increasing order of pka of the following amino acids in aqueous solution is : Gly, Asp, Lys, Arg
JEE Main 2018 (Online) 16th April Morning Slot
Among the following, the incorrect statement is :
JEE Main 2018 (Offline)
Glucose on prolonged heating with HI gives
JEE Main 2018 (Offline)
The predominant form of histamine present in human blood is (pKa, Histidine = 6.0)
JEE Main 2018 (Online) 15th April Evening Slot
The dipeptide, Gln-Gly, on treatment with CH3COCl followed y aqueous work up gives :
JEE Main 2018 (Online) 15th April Morning Slot
Which of the following is the correct structure of Adenosine?
JEE Main 2017 (Online) 9th April Morning Slot
The incorrect statement among the following is :
JEE Main 2017 (Online) 8th April Morning Slot
Among the following, the essential amino acid is :
JEE Main 2017 (Offline)
Which of the following compounds will behave as a reducing sugar in an aqueous KOH solution?
JEE Main 2016 (Online) 10th April Morning Slot
Observation of “Rhumann’s purple” is a confirmatory test for the presence of :
JEE Main 2016 (Online) 9th April Morning Slot
Consider the following sequence for aspartic acid : The pI (isoelectric point) of aspartic acid is :...
JEE Main 2016 (Offline)
Thiol group is present in :
JEE Main 2015 (Offline)
Which of the vitamins given below is water soluble?
JEE Main 2014 (Offline)
Which one of the following bases is not present in DNA?
JEE Main 2013 (Offline)
Synthesis of each molecule of glucose in photosynthesis involves:
AIEEE 2012
Which of the following compounds can be detected by Molisch’s test ?
AIEEE 2012
Which one of the following statements is correct ?
AIEEE 2011
The presence or absence of hydroxyl group on which carbon atom of sugar differentiates RNA and DNA ?
AIEEE 2010
Biuret test is not given by
AIEEE 2009
The two functional groups present in a typical carbohydrate are
AIEEE 2008
$$\alpha$$-D-(+)-glucose and $$\beta$$-D-(+)-glucose are
AIEEE 2007
The secondary structure of a protein refers to
AIEEE 2006
The term anomers of glucose refers to
AIEEE 2006
The pyrimidine bases present in DNA are
AIEEE 2005
In both DNA and RNA, heterocyclic base and phosphate ester linkages are at-
AIEEE 2004
Identify the correct statements regarding enzymes
AIEEE 2004
Which base is present in RNA but not in DNA?
AIEEE 2004
Insulin production and its action in human body are responsible for the level of diabetes. This compound belongs to which of the following categories?...
AIEEE 2003
Complete hydrolysis of cellulose gives
AIEEE 2003
The reason for double helical structure of $$DNA$$ is operation of
AIEEE 2002
The functional group, which is found in amino acid is
AIEEE 2002
RNA is different from DNA because RNA contains

Numerical

JEE Main 2024 (Online) 1st February Evening Shift
The number of tripeptides formed by three different amino acids using each amino acid once is ______.
JEE Main 2024 (Online) 31st January Evening Shift
From the vitamins $$\mathrm{A}, \mathrm{B}_1, \mathrm{~B}_6, \mathrm{~B}_{12}, \mathrm{C}, \mathrm{D}, \mathrm{E}$$ and $$\mathrm{K}$$, the number of ...
JEE Main 2024 (Online) 30th January Evening Shift
The total number of correct statements, regarding the nucleic acids is _________. A. RNA is regarded as the reserve of genetic information B. DNA mole...
JEE Main 2024 (Online) 29th January Morning Shift
Number of compounds among the following which contain sulphur as heteroatom is ___________. Furan, Thiophene, Pyridine, Pyrrole, Cysteine, Tyrosine...
JEE Main 2023 (Online) 12th April Morning Shift
In an oligopeptide named Alanylglycylphenyl alanyl isoleucine, the number of $$\mathrm{sp}^{2}$$ hybridised carbons is __________.
JEE Main 2023 (Online) 11th April Evening Shift
Number of compounds from the following which will not produce orange red precipitate with Benedict solution is ___________. Glucose, maltose, sucrose,...
JEE Main 2023 (Online) 1st February Evening Shift
Testosterone, which is a steroidal hormone, has the following structure. The total number of asymmetric carbon atom/s in testosterone is ____________...
JEE Main 2023 (Online) 30th January Evening Shift
A short peptide on complete hydrolysis produces 3 moles of glycine (G), two moles of leucine (L) and two moles of valine (V) per mole of peptide. The ...
JEE Main 2023 (Online) 24th January Evening Shift
Total number of tripeptides possible by mixing of valine and proline is ___________
JEE Main 2023 (Online) 24th January Morning Shift
Uracil is a base present in RNA with the following structure. % of N in uracil is ___________ Given: Molar mass N = 14 g mol$$^{-1}$$ O = 16 g mol$$^...
JEE Main 2022 (Online) 29th July Morning Shift
In a linear tetrapeptide (Constituted with different amino acids), (number of amino acids) $$-$$ (number of peptide bonds) is ________.
JEE Main 2022 (Online) 29th June Morning Shift
C6H12O6 $$\buildrel \text{Zymase} \over \longrightarrow $$ A $$\mathrel{\mathop{\kern0pt\longrightarrow} \limits_\Delta ^\text{NaOI}} $$ B + CHI3 The...
JEE Main 2022 (Online) 26th June Morning Shift
The number of oxygens present in a nucleotide formed from a base, that is present only in RNA is ___________.
JEE Main 2022 (Online) 25th June Evening Shift
How many of the given compounds will give a positive Biuret test ____________ ? Glycine, Glycylalanine, Tripeptide, Biuret
JEE Main 2022 (Online) 24th June Evening Shift
In alanylglycyl leucyl alanyl valine, the number of peptide linkages is ___________.
JEE Main 2021 (Online) 1st September Evening Shift
A peptide synthesized by the reactions of one molecule each of Glycine, Leucine, Aspartic acid and Histidine will have _________ peptide linkages.
JEE Main 2021 (Online) 26th August Morning Shift
The total number of negative charge in the tetrapeptide, Gly-Glu-Asp-Tyr, at pH 12.5 will be ______________. (Integer answer)
JEE Main 2020 (Online) 5th September Evening Slot
The number of chiral carbons present in sucrose is _____.
JEE Main 2020 (Online) 5th September Morning Slot
The number of chiral carbon(s) present in peptide, Ile-Arg-Pro, is _____.
JEE Main 2020 (Online) 4th September Evening Slot
The number of chiral centres present in threonine is ________.
JEE Main 2020 (Online) 3rd September Evening Slot
The number of groups present in a tripeptide Asp–Glu–Lys is ____....
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