Question

The chemical formula of starch is:

• A. $\left( C _{6} H _{10} O _{5}\right)_{ n }$
• B. $\left( C _{6} H _{12} O _{6}\right)_{ n }$
• C. $C _{12} H _{22} O _{11}$
• D. $CH _{3} COOH$

Answer 1

Answer: (A)

Starch is a homoglycan polysaccharides consist of $D$ glucose chain joined by $1,4 \,\alpha- D$ polyglucosidic bonds. Its chemical formula is $\left( C _{6} H _{10} O _{5}\right)_{ n }$ which comprises two main component water soluble amylose (about $20 \%$ ) and water insoluble amylopectin (about $80 \%$ ).