Question

1. which formula represents an oligosaccharide that consists of five monosaccharides joined together by dehydration synthesis?

o c6h12o6
o c30h60o30
o 5c6h12o6
o c30h52o26

Explanation:

A monosaccharide has the general formula $C_{6}H_{12}O_{6}$. When five monosaccharides join by dehydration synthesis, water ($H_2O$) is removed. For each bond formed, one $H_2O$ molecule is lost. When 5 monosaccharides combine, 4 water - molecules are lost. The total number of carbon atoms from 5 monosaccharides is $5\times6 = 30$, hydrogen atoms is $5\times12-4\times2=52$ and oxygen atoms is $5\times6 - 4=26$.

Answer:

$C_{30}H_{52}O_{26}$