Biomolecules — JEE Main PYQs

Match List I with List II.

List I
A. Zymase
B. Diastase
C. Urease
D. Pepsin

List II
I. Stomach
II. Yeast
III. Malt
IV. Soyabean

Choose the correct answer from the options given below:

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

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

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

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

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Sucrose is a disaccharide and a non-reducing sugar.
Reason (R): Sucrose involves glycosidic linkage between ${\mathrm{C}}_1$ of $\beta$-glucose and …

Identify the incorrect statement from the following:

The correct structure of Rhumann's Purple, the compound formed in the reaction of ninhydrin with proteins is:

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

Hydrolysis of sucrose gives:

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

Thiamine and pyridoxine are also known respectively as:

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

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

Match List-I with List-II.

List - I
(a) Sucrose
(b) Lactose
(c) Maltose

List - II
(i) $\beta$-D-Galactose and $\beta$-D-Glucose
(ii) $\alpha$-D-Glucose and $\beta$-D-Fructose
(iii) $\alpha$-D-Glucose and $\alpha$-D-Glucose

Choose the correct answer from the options giv …

Seliwanoff test and Xanthoproteic test are used for the identification of.......and.....respectively.

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

Which one of the following compounds contains $\beta -{\mathrm{C}}_1-{\mathrm{C}}_4$ glycosidic linkage?

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

The compound 'A' is a complementary base of ______ in DNA strands.

Which of the following is correct structure of tyrosine?

With respect to drug-enzyme interaction, identify the wrong statement.

The water soluble protein is:

Which one of the following is correct structure for cytosine?

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

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

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

The secondary structure of protein is stabilised by:

Deficiency of vitamin K causes:

Fructose is an example of:

${\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6\stackrel{\text{ Enzyme B }}{\to }2{\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}+2{\mathrm{CO}}_2$

In the above reactions, the enzyme $A$ and enzyme $B$ respectively are:

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

Match the following

Column - I
(i) Riboflamin
(ii) Thiamine
(iii) Pyridoxine
(iv) Ascorbic acid

Column - II
(a) Beriberi
(b) Scurvy
(c) Cheilosis
(d) Convulsions

Which of the following statements is correct?

Which of the following statement is not true for glucose?

Two monomers in maltose are:

A, B and C are three biomolecules. The results of the tests performed on them are given below:
| (C) | Negative | Negative | Posi …

The number of chiral carbons present in sucrose is ____ .

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

Which one of the following statements is not true?

Which of the following is not an essential amino acid?

The number of chiral carbon(s) present in peptide, lie-Arg-Pro, is ____

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

Which of the following will react with ${\mathrm{CHCl}}_3+$ alc. KOH ?

The number of chiral centres present in threonine is ____ .

Maltose on treatment with dilute HCl gives:

Fructose and glucose can be distinguished by:

The major product in the following reaction is:

Which of the following statements is not true about sucrose?

The correct structure of product ' P ' in the following reaction is