Which of the following statements is correct?

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(D) $1$. Cellulose is a linear homopolysaccharide of $\beta-D-glucose$ units linked by $\beta-1,4-glycosidic$ bonds. Thus,statement $A$ is correct.$2$

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All of the above statements are correct.

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(D) $1$. Cellulose is a linear homopolysaccharide of $\beta-D-glucose$ units linked by $\beta-1,4-glycosidic$ bonds. Thus,statement $A$ is correct.$2$. Starch consists of amylose (linear,$\alpha-1,4$ linkages) and amylopectin (branched,$\alpha-1,4$ and $\alpha-1,6$ linkages). Thus,statement $B$ is correct.$3$. Proteins are polymers of $\alpha-amino$ acids linked by peptide bonds,which are amide linkages. Thus,statement $C$ is correct.$4$. Nucleic acids ($DNA$ and $RNA$) store and transmit genetic information for biosynthesis. Thus,statement $D$ is correct.

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