MPSC PYQ

Polysaccharides

Tested in 2 real MPSC questions across 2 years (20162023). See it in context on the interactive Concept Graph →

Years it was asked

Real questions that test this

खालीलपैकी कोणता पिष्टमय पदार्थ डायसॅकराइड आहे ? Which of the following carbohydrates is a disaccharide ?

1)Glucose
2)Fructose
3)Sucrose✓ Correct
4)Cellulose

Sucrose is a disaccharide formed by the combination of two monosaccharides, glucose and fructose. Glucose and fructose are monosaccharides, while cellulose is a polysaccharide.

संयुग 'A' चे जलीय अपघटन (तीन H₂O वापरून) योग्य परिस्थितीत केले असता एक ग्लुकोज एकक, एक फ्रुक्टोज एकक आणि दोन गॅलॅक्टोज एकक तयार होतात, तर 'A' चे रेणुसुत्र ____________ हे आहे. / The compound 'A' undergoes hydrolysis (Using three H₂O) under appropriate conditions to form a unit of glucose, a unit of fructose and two units of galactose. The molecular formula of the compound 'A' is

a)C₂₄H₄₄O₂₂
b)C₂₄H₄₈O₂₄
c)C₂₄H₄₂O₂₁✓ Correct
d)C₂₄H₄₀O₂₀

Compound A is a tetrasaccharide formed by 1 glucose (C6H12O6), 1 fructose (C6H12O6), and 2 galactoses (C6H12O6). Total formula before hydrolysis: 4 monosaccharide units = 4*(C6H12O6) = C24H48O24. Subtracting 3 H2O molecules (H6O3) yields C24H42O21.