Which of the following pairs is INCORRECTLY matched?.

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Accepted Answer

Step-by-step check of each pair:

1) Lactose: Milk — Correct. Lactose is a disaccharide found in milk (lactose = glucose + galactose, written as $	ext{lactose} = 	ext{glucose} + 	ext{galactose}$).

2) Starch: Egg yolk — Incorrect. Starch is a plant polysaccharide (storage form of glucose) found in cereals, tubers and seeds. Egg yolk is animal-derived and contains mainly lipids and proteins, not starch.

3) Fructose: Grapes — Correct. Fructose is a common fruit sugar present in grapes and many fruits.

4) Maltose: Wheat, cornmeal and barley — Correct (maltose arises from enzymatic breakdown of starch in cereals and is especially associated with germinated grains and malts such as barley).

Conclusion: The incorrectly matched pair is (2) Starch: Egg yolk.

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