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JEE Mains | PYQ

Match List-I with List-II.

Choose the correct answer from the options given below :

Given below are two statements:
Statement I : D-glucose pentaacetate reacts with \( 2,4 \)-dinitrophenylhydrazine.
Statement II : Starch, on heating with concentrated sulfuric acid at \( 100^\circ \mathrm{C} \) and \( 2\text{–}3 \) atmosphere pressure produces glucose.
In the light of the above statements, choose the correct answer from the options given below:

Which of the following acids is a vitamin?

Identify correct conversion during acidic hydrolysis from the following:
(A) starch gives galactose.
(B) cane sugar gives equal amount of glucose and fructose.
(C) milk sugar gives glucose and galactose.
(D) amylopectin gives glucose and fructose
(E) amylose gives only glucose.
Choose the correct answer from the options given below:

A tetrapeptide, "x" on complete hydrolysis produced glycine (Gly), alanine (Ala), valine (Val), leucine (Leu) in equimolar proportion each. The number of tetrapeptides (sequences) possible involving each of these amino acids is:

Match List-I with List-II.

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The total number of hydrogen bonds of a DNA-double Helix strand whose one strand has the following sequence of bases is ________.
\( 5^{\prime} - \mathrm{G-G-C-A-A-A-T-C-G-G-C-T-A} - 3^{\prime} \)

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

Match the LIST-I with LIST-II.

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Identify the number of structure/s from the following which can be correlated to D-glyceraldehyde.

Match List - I with List - II.

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Identify the essential amino acids from below:
(A) Valine (B) Proline (C) Lysine (D) Threonine (E) Tyrosine
Choose the correct answer from the options given below:

Given below are two statements:
Statement (I): On hydrolysis, oligo peptides given rise to fewer number of \( \alpha \) – amino acids while proteins given rise to a large number of \( \beta \) – amino acids
Statement (II): Natural protein are denatured by acids which convert the water soluble form of fibrous proteins to their waver insoluble form.
In the light of the above statements, choose the most appropriate answer from the options given below:

Given below are two statements:
Statement I: Wet cotton clothes made of cellulose based carbohydrate takes comparatively longer time to get dried than wet nylon polymer based clothes.
Statement II: Intermolecular hydrogen bonding with water molecule is more in nylon-based clothes than in the case of cotton clothes.
In the light of the above statements, choose the correct answer from the options given below:

Given below are two statements:
Statement I: D-(+)‑glucose + D-(+) fructose \( \xrightarrow{-\mathrm{H_2O}} \) Sucrosesucrose \( \xrightarrow{\text{hydrolysis}} \) D-(+) glucose + D-(+) fructose
Statement II: Invert sugar is formed during sucrose hydrolysis
In the light of the above statements, choose the correct answer from the options given below.

The \( \alpha \) – Helix and \( \beta \) – Pleated sheet structures of protein are associated with its:

The carbohydrate “Ribose” present in DNA, is:
(A) A pentose sugar                        (B) present in pyranose from
(C) in “D” configuration                   (D) a reducing sugar, when free
(E) in \( \alpha \) – anomeric form
Choose the correct answer from the options given below:

Choose the correct option for structures of A and B, respectively:

Fat soluble vitamins are:
(A) Vitamin B \( 1 \)
(B) Vitamin C
(C) Vitamin E
(D) Vitamin B \( 12 \)
(E) Vitamin K
Choose the correct answer from the options given below:

Identify the correct statement among the following: