Biomolecules · Chemistry · JEE Main

The incorrect statement about Glucose is :

The $$\mathrm{F}^{-}$$ ions make the enamel on teeth much harder by converting hydroxyapatite (the enamel on the surface of teeth) into much harder fl...

The incorrect statement regarding the given structure is...

The incorrect statements regarding enzymes are : (A) Enzymes are biocatalysts. (B) Enzymes are non-specific and can catalyse different kinds of reacti...

DNA molecule contains 4 bases whose structure are shown below. One of the structures is not correct, identify the incorrect base structure.

Coagulation of egg, on heating is because of :

Which of the following gives a positive test with ninhydrin ?

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Which of the following is the correct structure of L-Glucose?

If one strand of a DNA has the sequence ATGCTTCA, sequence of the bases in complementary strand is :

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Sugar which does not give reddish brown precipitate with Fehling's reagent, is :

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Type of amino acids obtained by hydrolysis of proteins is :

Which structure of protein remains intact after coagulation of egg white on boiling?

Two nucleotides are joined together by a linkage known as :

Which is not true for arginine?

The naturally occurring amino acid that contains only one basic functional group in its chemical structure is

The products formed in the above reaction are...

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...

The one that does not stabilize 2$$^\circ$$ and 3$$^\circ$$ structures of proteins is

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Sulphur (S) containing amino acids from the following are: (a) isoleucine (b) cysteine (c) lysine (d) methionine (e) glutamic acid

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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...

All structures given below are of vitamin C. Most stable of them is :

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : $$\alpha$$-halocarboxylic a...

The correct representation in six membered pyranose form for the following sugar [X] is ...

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A protein '$$\mathrm{X}$$' with molecular weight of $$70,000 \mathrm{~u}$$, on hydrolysis gives amino acids. One of these amino acid is

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...

Following tetrapeptide can be represented as (F, L, D, Y, I, Q, P are one letter codes for amino acids)...

Number of cyclic tripeptides formed with 2 amino acids A and B is :

Match items of Row I with those of Row II. Row I : Row II : (i) $$\alpha$$-$$\mathrm{D}$$-$$(-)$$-$$\mathrm{Fructofuranose}$$ (ii) $$\beta$$-D-$$(-)$...

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...

The formulas of A and B for the following reaction sequence are...

For the below given cyclic hemiacetal (X), the correct pyranose structure is : ...

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A sugar 'X' dehydrates very slowly under acidic condition to give furfural which on further reaction with resorcinol gives the coloured product after ...

Animal starch is the other name of

Which one of the following is a reducing sugar?

Glycosidic linkage between C1 of $$\alpha$$-glucose and C2 of $$\beta$$-fructose is found in

During the denaturation of proteins, which of these structures will remain intact?

The sugar produced after complete hydrolysis of DNA is

The structure of protein that is unaffected by heating is

Sugar moiety in DNA and RNA molecules respectively are

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...

Stability of $$\alpha$$-Helix structure of proteins depends upon

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...

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...

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Which one of the following is a water soluble vitamin, that is not excreted easily?

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...

Which of the following is not an example of fibrous protein?

Which one of the following compounds contains $$\beta$$-C1-C4 glycosidic linkage?

Hydrolysis of sucrose gives :

Out of following isomeric forms of uracil, which one is present in RNA?

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...

Compound A gives D-Galactose and D-Glucose on hydrolysis. The compound A is :

Which one among the following chemical tests is used to distinguish monosaccharide from disaccharide?

The compound 'A' is a complementary base of _______________ in DNA stands....

Which one of the following is correct structure for cytosine?

The water soluble protein is :

Thiamine and pyridoxine are also known respectively as :

Which one of the following statements is not true about enzymes?

Identify the incorrect statement from the following

Deficiency of vitamin K causes :

A non-reducing sugar "A" hydrolyses to give two reducing mono saccharides. Sugar A is

$${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...

Fructose is an example of :

Which of the following is correct structure of tyrosine?

The secondary structure of protein is stabilised by:

Which among the following pairs of Vitamins is stored in our body relatively for longer duration?

Match List - I with List - II. List - I List - II (a) Sucrose (i) $$\beta $$-D-Galactose and $$\beta $$...

Which of the following vitamin is helpful in delaying the blood clotting?

Which of the following is correct structure of $$\alpha$$-anomer of maltose?

Which of the glycosidic linkage between galactose and glucose is present in lactose?

Match List - I and List - II. List I List II (a) Valium (i) Antifertility drug (b) Morphin...

Out of the following, which type of interaction is reponsible for the stabilisation of $$\alpha $$-helix structure of proteins ?

Which one of the following statements is not true?

Which of the following is not an essential amino acid :

Which of the following will react with CHCl3 + alc. KOH?

What are the functional groups present in the structure of maltose?

The correct observation in the following reactions is : ...

Consider the following rections: 'x', 'y' and 'z' in these reactions are respectively....

Two monomers in maltose are :

Which of the following statement is not true for glucose?

Which of the following statements is correct ?

Match the following : (i) Riboflavin    (a) Beriberi (ii) Thiamine    (b) Scurvy (iii) Pyridoxine   (c) Chelio...

Which of the given statements is INCORRECT about glycogen?

Glucose and Galactose are having identical configuration in all the positions except position

Which of the following statements is not true about RNA?

Number of stereo centers present in linear and cyclic structures of glucose are respectively :

Amylopectin is compound of :

The peptide that gives positive ceric ammonium nitrate and carbylamine tests is :

Which of the following statements is not true about sucrose?

Fructose and glucose can be distinguished by :

Maltose on treatment with dilute HCI gives :

The correct structure of histidine in a strongly acidic solution (pH = 2) is -

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...

Among the following compounds most basic amino acid is -

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Among the following compounds, which one is found in RNA ?

Which of the following tests cannot be used for identifying amino acids?

The correct structure of product 'P' in the following reactions is : ...

The correct sequence of amino acids present in the tripeptide given below is : ...

The increasing order of pka of the following amino acids in aqueous solution is : Gly, Asp, Lys, Arg

Among the following, the incorrect statement is :

The predominant form of histamine present in human blood is (pKa, Histidine = 6.0)

Glucose on prolonged heating with HI gives

The dipeptide, Gln-Gly, on treatment with CH3COCl followed y aqueous work up gives :

Which of the following is the correct structure of Adenosine?

The incorrect statement among the following is :

Among the following, the essential amino acid is :

Which of the following compounds will behave as a reducing sugar in an aqueous KOH solution?

Observation of “Rhumann’s purple” is a confirmatory test for the presence of :

Consider the following sequence for aspartic acid : The pI (isoelectric point) of aspartic acid is :...

Thiol group is present in :

Which of the vitamins given below is water soluble?

Which one of the following bases is not present in DNA?

Synthesis of each molecule of glucose in photosynthesis involves:

Which of the following compounds can be detected by Molisch’s test ?

Which one of the following statements is correct ?

The presence or absence of hydroxyl group on which carbon atom of sugar differentiates RNA and DNA ?

Biuret test is not given by

The two functional groups present in a typical carbohydrate are

$$\alpha$$-D-(+)-glucose and $$\beta$$-D-(+)-glucose are

The secondary structure of a protein refers to

The term anomers of glucose refers to

The pyrimidine bases present in DNA are

In both DNA and RNA, heterocyclic base and phosphate ester linkages are at-

Identify the correct statements regarding enzymes

Insulin production and its action in human body are responsible for the level of diabetes. This compound belongs to which of the following categories?...

Which base is present in RNA but not in DNA?

The reason for double helical structure of $$DNA$$ is operation of

Complete hydrolysis of cellulose gives

The functional group, which is found in amino acid is

RNA is different from DNA because RNA contains

Total number of essential amino acid among the given list of amino acids is ________. Arginine, Phenylalanine, Aspartic acid, Cysteine, Histidine, Val...

The total number of carbon atoms present in tyrosine, an amino acid, is ________.

The number of tripeptides formed by three different amino acids using each amino acid once is ______.

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 ...

The total number of correct statements, regarding the nucleic acids is _________. A. RNA is regarded as the reserve of genetic information B. DNA mole...

Number of compounds among the following which contain sulphur as heteroatom is ___________. Furan, Thiophene, Pyridine, Pyrrole, Cysteine, Tyrosine...

In an oligopeptide named Alanylglycylphenyl alanyl isoleucine, the number of $$\mathrm{sp}^{2}$$ hybridised carbons is __________.

Number of compounds from the following which will not produce orange red precipitate with Benedict solution is ___________. Glucose, maltose, sucrose,...

Testosterone, which is a steroidal hormone, has the following structure. The total number of asymmetric carbon atom/s in testosterone is ____________...

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 ...

Total number of tripeptides possible by mixing of valine and proline is ___________

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$$^...

In a linear tetrapeptide (Constituted with different amino acids), (number of amino acids) $$-$$ (number of peptide bonds) is ________.

C6H12O6 $$\buildrel \text{Zymase} \over \longrightarrow $$ A $$\mathrel{\mathop{\kern0pt\longrightarrow} \limits_\Delta ^\text{NaOI}} $$ B + CHI3 The...

The number of oxygens present in a nucleotide formed from a base, that is present only in RNA is ___________.

How many of the given compounds will give a positive Biuret test ____________ ? Glycine, Glycylalanine, Tripeptide, Biuret

In alanylglycyl leucyl alanyl valine, the number of peptide linkages is ___________.

A peptide synthesized by the reactions of one molecule each of Glycine, Leucine, Aspartic acid and Histidine will have _________ peptide linkages.

The total number of negative charge in the tetrapeptide, Gly-Glu-Asp-Tyr, at pH 12.5 will be ______________. (Integer answer)

The number of chiral carbons present in sucrose is _____.

The number of chiral carbon(s) present in peptide, Ile-Arg-Pro, is _____.

The number of chiral centres present in threonine is ________.

The number of groups present in a tripeptide Asp–Glu–Lys is ____....