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When sugar \( X \) is boiled with dilute \( \mathrm{H_2SO_4} \) in alcoholic solution, two isomers \( A \) and \( B \) are formed. \( A \) on oxidation with \( \mathrm{HNO_3} \) yields saccharic acid where as \( B \) is laevorotatory. The compound \( X \) is:

Given below are two statements.
Statement I : Maltose has two \( \alpha \)- D-glucose units linked at \( C_1 \) and \( C_4 \) and is a reducing sugar.
Statement II: Maltose has two monosaccharides; \( \alpha \)- D-glucose and \( \beta \)- D-glucose linked at \( C_1 \) and \( C_6 \) and it is a non-reducing sugar.
In the light of the above statements, choose the correct answer from the options given below.

Which one of the following is a reducing sugar?

Match List-I with List-II

List-I	List-II
(A) Glucose + \( \mathrm{HI} \)	(I) Gluconic acid
(B) Glucose + \( \mathrm{Br}_2 \) water	(II) Glucose pentaacetate
(C) Glucose + acetic anhydride	(III) Saccharic acid
(D) Glucose + \( \mathrm{HNO}_3 \)	(IV) Hexane

Choose the correct answer from the options given below:

The structure of protein that is unaffected by heating is:

Animal starch is the other name of

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

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

Stability of \( \alpha \)-helix structure of proteins depends upon:

10.

Match List I with List II.

Choose the correct answer from the options given below:

11.

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

12.

Sugar moiety in DNA and RNA molecules respectively are:

13.

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

14.

Match List-I with List-II.

Choose the most appropriate answer from the options given below:

15.

How many of the following drugs is/are example(s) of broad spectrum antibiotics?
Ofloxacin, Penicillin G, Terpineol, Salvarsan.

16.

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.
Reason R : Amylose is a long linear molecule with more than \( 200 \) glucose units.
In the light of the above statements, choose the correct answer from the options given below.

17.

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

18.

A protein ‘A’ contains \( 0.30\% \) of glycine (molecular weight \( 75 \)). The minimum molar mass of the protein ‘A’ is __________ \( \times 10^3 \, \mathrm{g\, mol^{-1}} \) [nearest integer]

19.

Which of the following compounds is an example of hypnotic drug?

20.

. Match List-I with List-II

List -I (Polymer)	List-II (Monomer)
(A) Neoprene	(I) Acrylonitrile
(B) Teflon	(II) Chloroprene
(C) Acrilan	(III) Tetrafluoroethene
(D) Natural rubber	(IV) Isoprene

Choose the correct answer from the options given below:

21.

In a linear tetrapeptide (Constituted with different amino acids), (number of amino acids) – (Number of peptide bonds) is __________.

22.

A sugar ‘\( X \)’ dehydrates very slowly under acidic condition to give furfural which on further reaction with resorcinol gives the coloured product after sometime. Sugar ‘\( X \)’ is:

23.

A chemical which stimulates the secretion of pepsin is:

24.

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

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JEE Main 2022 25th July Morning Shift

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

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JEE Mains | PYQ