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

The reactions that occur in the ribosome, where amino acids are combined to form proteins are anabolic or catabolic?

Astudent wants to test the hypothesis that fertilizer improves the growth rate of grass seeds. to test this hypothesis, the student put the same amount of grass seed in 3 containers with the same type of soil. the student measured the growth at the end of the week. all plants received equal amounts of water and sunlight. if you were asked to graph this data, what would you place on the x-axis? a. fertilizer b. water c. plant growth d. week one

The table lists the observations students made about four specimens under a microscope. based on these observations, what specimens did the students examine? animal plant virus prokaryote cell membrane present ribosomes present lysosomes present nuclear membrane present cell wall present ribosomes present nuclear membrane absent cell wall present ribosomes present nucleus present large vacuole present reproduces inside of a cell nucleus absent rna present 2019 edmentum all rights reserved intl