Question

At which pH does the protein precipitate?

(a) 1

(b) 7

(c) 8

(d) 9

This question was addressed to me in examination.

My question is from Anaerobic Bacterial Degradation of Biopolymers topic in chapter Biodegradation of Organic Pollutants of Environmental Biotechnology

Answer 1

Right choice is (a) 1

Best explanation: At an acidic pH i.e preferably 1 tp 4 pH or in presence of enzymes the proteins precipitate outside the cell and not in neutral i.e pH 7 or basic pH i.e 8 to 14.