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

How can scientists test their ideas about the origin of the universe if they can't physically interact with or study?

Subduction zones form when an oceanic plate collides with another oceanic plate or continental plate. the continental crust is lighter and less dense than oceanic crust. continental crust's density is approximately 2.7 grams per cubic centimeter. oceanic crust is thinner and the average density is about 3.3 cubic centimeters. when the two crustal plates converge the oceanic plate always bends and subducts beneath a continental plate. once the oceanic crust subjects, the rocks are subjected to changes in heat and pressure. because of this, we would expect to find rocks in the area of a subduction. a) clastic b) igneous c) metamorphic d) sedimentary

Wich of the following are manual restraint techniques for dogs