Aresearcher added a mixture of animal proteins to a physiological bufler solution (ph 7.4) in a test tube incubated at 37"c.
the researcher then added purified pepsin to the mbture, but even after several hours, the proteins were not digested.

which of the following would explain this result?

a)pepsin must be converted to its active form, pepsinogen, which digests proteins.

b)the ph was too high

c)pepsin doesn't digest animal proteins

d)the temperature was too low

b)The pH was too high

Explanation:

pepsin is enzyme present in stomach and involves in digestion of proteins. Pepsin dont work at high pH as it normally activates around acidic pH 2. so in stomach, HCL is released from the linings, which will decrease the pH of the stomach and will cause activation of pepsin after the stimulation of food arrival in to the stomach.

the sun d the answer is sun

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link: