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Lactose can be a nutrient source for bacteria, it is a _____________________

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Lactose can be a nutrient source for bacteria, it is a _____________________

(a) monosaccharide

(b) lipid

(c) disaccharide

(d) polysaccharide

This question was posed to me in an online interview.

I'm obligated to ask this question of Gene Expression Control topic in division Control of Gene Expression of Cell Biology

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The correct option is (c) disaccharide

To explain I would say: Lactose is a disaccharide comprised of glucose and galactose. Oxidation of this disaccharide can provide a bacterial cell with metabolic intermediates and energy.

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