List of top Chemistry Questions on Biomolecules asked in JEE Main

Sugar moiety in DNA and RNA molecules, respectively are
During the denaturation of proteins, which of these structures will remain intact ?
In the above reaction, 5 g of toluene is converted into benzaldehyde with 92% yield. The amount of benzaldehyde produced is______ × 10–2 g. (Nearest integer).
The formulas of A and B for the following reaction sequence are
formula for reaction

The number of molecules(s) or ions(s) from the following having non-planar structure is ____.
\(NO^-_3, H_2O_2, BF_3, PCl_3, XeF_4, SF_4, XeO_3, PH^+_4, SO3,[Al(OH)_4]^-\)

The structure shown below is of which well-known drug molecule?
drug molecule
Which one of the following is a water soluble vitamin, that is not excreted easily?
Amongst BeF2, BF3, H2O, NH3, CCl4 and HCl, the number of molecules with non-zero net dipole moment is ______.
A sugar ‘X’ dehydrates very slowly under acidic conditions to give furfural which on further reaction with resorcinol gives the coloured product after some time. Sugar ‘X’ is
sugar ‘X’ dehydrates very slowly under acidic condition
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 whereas ‘B’ is laevorotatory. The compound ‘X’ is :

Match List-I with List-II
 

List-IList-II
(A) Glucose + HI(I) Gluconic acid
(B) Glucose + Br2 water(II) Glucose pentacetate
(C) Glucose + acetic anhydride(III) Saccharic acid
(D) Glucose + HNO3(IV) Hexane
For the below given cyclic hemiacetal (X), the correct pyranose structure is :
cyclic hemiacetal (X)
Hydrolysis of sucrose gives :
The water soluble protein is :
Compound A gives D-Galactose and D-Glucose on hydrolysis. The compound A is :
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 C\(_1\) of \(\beta\)-glucose and C\(_2\) of \(\alpha\)-fructose.
Choose the most appropriate answer from the options given below :
The total number of negative charge in the tetrapeptide, Gly-Glu-Asp-Tyr, at pH 12.5 will be _________. (Integer answer)

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

Which one of the following compounds contains \(\beta\)-C\(_1\)-C\(_4\) glycosidic linkage?
Which of the following is NOT an example of fibrous protein ?

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

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 glycosidic linkage between galactose and glucose is present in lactose ?
Out of the following, which type of interaction is responsible for the stabilisation of α-helix structure of proteins ?