E. coli, Enterobacter aerogenes, Salmonella typhi, and Proteus vulgaris are all able to metabolize glucose. Why are they all not able to metabolize lactose and sucrose?
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Expert's answer
2012-07-12T10:45:00-0400
these microorganisms do not have enzymes that are needed for cleavage of lactose and sucrose (disaccharides) to glucose and fructose (monosaccharides). These enzymes are called invertase and lactase.
Microorganisms can do nothing with lactose and sucrose without these enzymes.
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