Identifying plant-based polysaccharides as saccharides

Steps:

• Saccharides encompass carbohydrates, including polysaccharides formed from glucose monomers.
• Examine each option for components: amylose (linear starch), amylopectin (branched starch), cellulose (β-linked glucose chains), glycogen (branched animal storage).
• Confirm A contains only plant-derived polysaccharides: starch components and cell wall material.
• Eliminate options with glycogen, as it is animal-specific, not aligning with typical plant saccharide contexts.

Why A is correct:

• Amylose, amylopectin, and cellulose are all glucose polysaccharides exclusive to plants, fitting the saccharide category for plant biology.

Why the others are wrong:

• B includes glycogen, an animal polysaccharide.
• C includes glycogen, an animal polysaccharide.
• D includes glycogen, an animal polysaccharide.

Final answer: A