Q.A mixture of amylose and amylopectin is called ______.

The two important polysaccharides found in plants are starch and cellulose.

Concept. Polysaccharides are long condensation polymers of monosaccharide units joined by glycosidic linkages. In plants:

• Starch — the food-storage polysaccharide, a polymer of $\alpha$-D-glucose consisting of amylose (linear) and amylopectin (branched). …

Cellulose is a polymer of thousands of glucose units (a polysaccharide); maltose and sucrose are disaccharides and fructose is a monosaccharide. Answer: (d).

• Maltose = glucose + glucose (disaccharide).
• Sucrose = glucose + fructose (disaccharide). …

Both are glucose polymers, but they differ in the type of glycosidic linkage joining the glucose units — $\alpha$ in starch, $\beta$ in cellulose — which changes the overall shape and digestibility of the polymer.

Structural comparison

• Starch is a polymer of $\alpha$-D-glucose units. It consists of two components: amylose (a long unbranched chain of glucose units joined by $\alpha(1\rightarrow4)$-glycosidic linkages, which coils into a helical structure) and amylopectin (a branched-chain polysaccharide of glucose units joined mainly by $\alpha(1\rightarrow4)$ linkages, with branching through $\alpha(1\rightarrow6)$-glycosidic linkages roughly every 25 units).
• Cellulose is a polymer made up only of $\beta$-D-glucose units, joined exclusively by $\beta(1\rightarrow4)$-glycosidic linkages, forming a long, straight, unbranched chain. These linear chains run parallel and are extensively hydrogen-bonded to each other, giving cellulose fibres great mechanical strength (as in the plant cell wall). …

Glycogen is the reserve carbohydrate stored in the animal body, hence "animal starch" — option (c).

Starch is a mixture of two glucose polymers — the linear, helical amylose and the highly branched amylopectin.

Starch, the storage polysaccharide of plants, is composed of two distinct components, both built from $\alpha$-D-glucose units:

1. Amylose (≈15–20% of starch): a linear, unbranched chain of $\alpha$-D-glucose units joined by $\alpha(1\rightarrow4)$ glycosidic linkages. It coils into a helical shape and is responsible for the blue-black colour starch gives with iodine (iodine molecules slot inside the helix). …

Cellulose, the structural polysaccharide of plant cell walls, is the most abundant carbohydrate (and organic compound) on Earth.

Cellulose is a straight-chain polymer of beta-D-glucose units joined by beta-1,4-glycosidic linkages. It forms the structural framework of plant cell walls and, since plants dominate the biosphere, it is the single most abundant carbohydrate in nature. Glucos …

Starch, the storage polysaccharide in plants, is a mixture of two glucose polymers: amylose and amylopectin.

Starch is made of two components:

• Amylose (~15-20%): a long unbranched chain of alpha-D-glucose units joined by C1-C4 glycosidic linkages; it is water-soluble and responsible for the blue colour with iodine.
• Amylopectin (~80-85%): a branched-chain polymer of alpha-D-glucose, with branching occurring through C1-C6 glycosidic linkages; it is insoluble in water. …

Starch is a naturally occurring polysaccharide, built entirely of α-D-glucose units (as amylose and amylopectin) synthesised by plants — it is a natural, not artificial, polymer.

The statement is False.

Starch is a polysaccharide (a carbohydrate biomolecule), made of a very large number of glucose units joined by glycosidic linkages. It occurs naturally in plants (seeds, tubers, roots) as the main storage form of energy, and consists of:

• Amylose (15–20%): a long unbranched chain of $\alpha$-D-glucose units linked by C1–C4 glycosidic bonds.
• Amylopectin (80–85%): a branched-chain polymer with additional C1–C6 branch linkages. …

Part (a): starch = $\alpha$-glucose, $\alpha$-(1→4)/(1→6) links (helical, digestible); cellulose = $\beta$-glucose, $\beta$-(1→4) links (linear, indigestible). Part (b): DNA hydrolyses to 2-deoxyribose, phosphoric acid, and the bases A, G, C and T.