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