Which of the statements about polysaccharides can be used to describe both starch and cellulose?
1 adjacent glucose molecules are rotated by ${180^ \circ }$
2 contains glycosidic bonds
3 polymer of $\alpha $–glucose
1 )
1 only
2 only
3 )
1 and 3 only
4 )
2 and 3 only
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