Question

Monosaccharides present in stachyose:

• A. galc-galc-glc-fruc.
• B. glc-fruc-glc-glc.
• C. galc-glc-fruc-glc.
• D. glc-galc-glc-fruc.

Hint:

Stachyose is often found in beans and other legumes. It's a type of oligosaccharide that cannot be fully digested by humans, leading to its fermentation in the gut.

Answer 1

The Correct Option is A

Stachyose is a tetrasaccharide that consists of two galactose (galc) units, one glucose (glc) unit, and one fructose (fruc) unit. The monosaccharides in stachyose are arranged as galactose-galactose-glucose-fructose. The structure of stachyose is important in both food and biological systems, particularly because of its role in fiber-rich foods.
- Option (1) "galc-galc-glc-fruc" is correct as it accurately reflects the monosaccharide components of stachyose.
- Option (2) "glc-fruc-glc-glc" is incorrect as it does not follow the correct sequence of monosaccharides.
- Option (3) "galc-glc-fruc-glc" is incorrect due to the incorrect positioning of glucose and fructose.
- Option (4) "glc-galc-glc-fruc" is incorrect because it does not reflect the correct arrangement of monosaccharides.
Thus, the correct answer is "galc-galc-glc-fruc."