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Biomolecules

309 Questions Start JEE Mains Test
All Exams JEE Mains JEE Advanced TS-EAMCET AP-EAPCET BITSAT
2005 Q301 JEE Mains MCQ
14 Mar 2026
In both DNA and RNA, heterocyclic base and phosphate ester linkages are at-
A.
$C_5^{'}$ and $C_2^{'}$ respectively of the sugar molecule
B.
$C_2^{'}$ and $C_5^{'}$ respectively of the sugar molecule
C.
$C_1^{'}$ and $C_5^{'}$ respectively of the sugar molecule
D.
$C_5^{'}$ and $C_1^{'}$ respectively of the sugar molecule
2005 Q302 JEE Advanced Numerical
14 Mar 2026

Which of the following disaccharide will not reduce Tollen's reagent?

IIT-JEE 2005 Mains Chemistry - Biomolecules Question 6 English

2004 Q303 JEE Mains MCQ
14 Mar 2026
Identify the correct statements regarding enzymes
A.
Enzymes are specific biological catalysts that can normally function at very high temperature (T ~ 1000 K)
B.
Enzymes are specific biological catalysts that the posses well – defined active sites
C.
Enzymes are specific biological catalysts that can not be poisoned
D.
Enzymes are normally heterogeneous catalysts that are very specific in their action
2004 Q304 JEE Mains MCQ
14 Mar 2026
Which base is present in RNA but not in DNA?
A.
Uracil
B.
Thymine
C.
Guanine
D.
Cytosine
2004 Q305 JEE Mains MCQ
14 Mar 2026
Insulin production and its action in human body are responsible for the level of diabetes. This compound belongs to which of the following categories?
A.
A co- enzyme
B.
An antibiotic
C.
An enzyme
D.
A hormone
2003 Q306 JEE Mains MCQ
14 Mar 2026
The reason for double helical structure of $DNA$ is operation of
A.
dipole-dipole interaction
B.
hydrogen bonding
C.
electrostatic attractions
D.
van der Waals' forces
2003 Q307 JEE Mains MCQ
14 Mar 2026
Complete hydrolysis of cellulose gives
A.
D-ribose
B.
D-glucose
C.
L-glucose
D.
D-fructose
2002 Q308 JEE Mains MCQ
14 Mar 2026
The functional group, which is found in amino acid is
A.
-COOH group
B.
-NH2 group
C.
-CH3 group
D.
both (a) and (b)
2002 Q309 JEE Mains MCQ
14 Mar 2026
RNA is different from DNA because RNA contains
A.
ribose sugar and thymine
B.
ribose sugar and uracil
C.
deoxyribose sugar and thymine
D.
deoxyribose sugar and uracil