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1
COMEDK 2025 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0
Which one of the following is the correct statement?
A
Fructose exists as a five membered ring named furanose.
B
Glucose gives Saccharic acid on reaction with $\mathrm{Br}_2$ water.
C
Amylose is a water insoluble branched chain polymer of $\alpha-D-(-)$-glucose.
D
Cellulose is a branched chain polysaccharide having only $\propto$-D-glucose units.
2
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0
Choose the incorrect statement.
A
The hormone Glucocorticoid controls the level of excretion of water and salts by the kidney.
B
Vitamins $A$ and $K$ are fat soluble and are stored in the liver of human beings.
C
Denaturation of protein is due to loss of both the secondary and tertiary structures of the protein.
D
Complete hydrolysis of RNA gives Nitrogen containing bases, a pentose sugar and phosphoric acid.
3
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0

Two statements, one Assertion (A) and the other Reason (R) are given. Choose the correct option.

Assertion: Maltose, a disaccharide, is a reducing sugar and is obtained by the partial hydrolysis of starch in presence of the enzyme diastase.

Reason: Hydrolysis of one mole of Maltose gives one mole each of $\alpha-D-$ Glucose and $\beta-D-$ Fructose.

A
A is wrong but R is correct.
B
Both A and R are correct but R is not the correct explanation of A .
C
A is correct but R is wrong.
D
Both A and R are correct and R is the correct explanation of A .
4
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0

Match the reactions of Glucose given in Column I with the major product formed in the reaction as in Column II.

Column I - Reactions Column II - Major product
A. $\mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}_6+\mathrm{HI}$ (Heat) P. $\mathrm{HOOC}-(\mathrm{CHOH})_4-\mathrm{COOH}$
B. $\mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}_6+\mathrm{Br}_2(\mathrm{aq})$ Q. $\mathrm{CH}_3-\left(\mathrm{CH}_2\right)_4-\mathrm{CH}_3$
C. $\mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}_6+$ Conc. $\mathrm{HNO}_3$ R. $\mathrm{NH}_4 \mathrm{O}-\mathrm{OC}-(\mathrm{CHOH})_4-\mathrm{CH}_2 \mathrm{OH}$
D. $\mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}_6+2\left[\mathrm{Ag}\left(\mathrm{NH}_3\right)_2\right] \mathrm{OH}$ S. $\mathrm{HOOC}-(\mathrm{CHOH})_4-\mathrm{CH}_2 \mathrm{OH}$

A
$\mathrm{A}=\mathrm{S} \quad \mathrm{B}=\mathrm{R} \quad \mathrm{C}=\mathrm{Q} \quad \mathrm{D}=\mathrm{P}$
B
$A=P \quad B=S \quad C=Q \quad D=R$
C
$\mathrm{A}=\mathrm{R} \quad \mathrm{B}=\mathrm{P} \quad \mathrm{C}=\mathrm{S} \quad \mathrm{D}=\mathrm{Q}$
D
$\mathrm{A}=\mathrm{Q} \quad \mathrm{B}=\mathrm{S} \quad \mathrm{C}=\mathrm{P} \quad \mathrm{D}=\mathrm{R}$
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