List of top Chemistry Questions on Biomolecules asked in JEE Main

From the vitamins $ A, \, B_1, \, B_6, \, B_{12}, \, C, \, D, \, E, \, \text{and} \, K $, the number of vitamins that can be stored in our body is ______.

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

Total number of essential amino acid among the given list of amino acids is _______.
Arginine, Phenylalanine, Aspartic acid, Cysteine, Histidine, Valine, Proline

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

Vanillin compound obtained from vanilla beans, has total sum of oxygen atoms and $ \pi $ electrons is ______

Coagulation of egg, on heating is because of :

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

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

Number of compounds among the following which contain sulfur as a heteroatom is ___.
Compounds: Furan, Thiophene, Pyridine, Pyrrole, Cysteine, Tyrosine

$\textbf{Match List I with List II}$
$\begin{array}{|c|c|c|} \hline \text{List I (Bio Polymer)} & \text{List II (Monomer)} \\ \hline \text{A. Starch} & \text{I. nucleotide} \\ \text{B. Cellulose} & \text{II. } \alpha\text{-glucose} \\ \text{C. Nucleic acid} & \text{III. } \beta\text{-glucose} \\ \text{D. Protein} & \text{IV. } \alpha\text{-amino acid} \\ \hline \end{array}$
$\text{Choose the correct answer from the options given below :-}$

The total number of correct statements, regarding the nucleic acids is_________.
A. RNA is regarded as the reserve of genetic information.
B. DNA molecule self-duplicates during cell division.
C. DNA synthesizes proteins in the cell.
D. The message for the synthesis of particular proteins is present in DNA.
E. Identical DNA strands are transferred to daughter cells.

Match List I with List II
$\begin{array}{|c|c|c|} \hline \text{LIST-I} & & \text{LIST-II} \\ \hline \text{A. Glucose/NaHCO}_3/\Delta & & \text{I. Gluconic acid} \\ \text{B. Glucose/HNO}_3 & & \text{II. No reaction} \\ \text{C. Glucose/HI/} \Delta & & \text{III. n-hexane} \\ \text{D. Glucose/Bromine water} & & \text{IV. Saccharic acid} \\ \hline \end{array}$
Choose the correct answer from the options given below:

An indicator ' X ' is used for studying the effect of variation in concentration of iodide : on the rate of reaction of iodide ion with $H_2O_2 $ at room temp. The indicator ' X ' forms blue colored complex with compound ' A ' present in the solution. The indicator ' X ' and compound 'A' respectively are

Compound $A , C _5 H _{10} O _5$, given a tetraacetate with $AC _2 O$ and oxidation of $A$ with $Br _2- H _2 O$ gives an acid, $C _5 H _{10} O _6$ Reduction of $A$ with $HI$ gives isopentane The possible structure of $A$ is:

Glycosidic linkage between $C _1$ of $\alpha$-glucose and $C_2$ of $\beta$-fructose is found in

Match the terms in Column-I with their description in Column-II and choose the correct option :

Column I		Column II
(i)	Vitamin A	a	Beri-beri
(ii)	Vitamin C (Ascorbic acid)	b	Cheilosis
(iii)	Riboflavin	c	Xerophthalmia
(iv)	Thiamine	d	Scurvy

Sulphur (S)-containing amino acids from the following are:
(a) Isoleucine
(b) Cysteine
(c) Lysine
(d) Methionine
(e) Glutamic acid

One which does not stabilize secondary and tertiary protein?

We are given some diseases in Column II. Column-I contains name of some vitamins and their deficiencies will cause:

Column-I		Column-II
(A)	Vitamin A	(p)	Scurvy
(B)	Vitamin B₂	(q)	Xerophthalmia
(C)	Vitamin B₁ (Thiamine)	(r)	Cheilosis
(D)	Vitamin C	(s)	Beri Beri

Red ppt. by Benedict solution is?

L-isomer of tetrose X ($C_4H_8O_4$) gives positive Schiff’s test and has two chiral carbons. On acetylation, ‘X’ yields triacetate. ‘X’ undergoes following reactions

Chiral compound ‘X’ is

Number of compounds from the following which will not produce orange red precipitate with Benedict solution is ____________
Glucose, maltose, sucrose, ribose, 2-deoxyribose, amylose, lactose