1
JEE Main 2025 (Online) 24th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

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 $\propto$-anomeric form

Choose the correct answer from the options given below:

A
  A, D and E Only
B
B, D and E Only
C
A, C and D Only
D
A, B and E Only
2
JEE Main 2025 (Online) 23rd January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The $\alpha$-Helix and $\beta$ - Pleated sheet structures of protein are associated with its :

A
tertiary structure
B
quaternary structure
C
primary structure
D
secondary structure
3
JEE Main 2025 (Online) 23rd January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements:

Statement I: Fructose does not contain an aldehydic group but still reduces Tollen's reagent

Statement II: In the presence of base, fructose undergoes rearrangement to give glucose.

In the light of the above statements, choose the correct answer from the options given below

A
Statement I is true but Statement II is false
B
Statement I is false but Statement II is true
C
Both Statement I and Statement II are true
D
Both Statement I and Statement II are false
4
JEE Main 2025 (Online) 22nd January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

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

JEE Main 2025 (Online) 22nd January Evening Shift Chemistry - Biomolecules Question 15 English

A
three
B
two
C
one
D
four
JEE Main Subjects
EXAM MAP