A researcher has isolated a protein produced by a snail and thought to be an intercellular chemical signaling agent.The researcher will incubate this agent with snail cells to test whether a specific cellular response occurs.What control should be run at the same time?
A) Incubate normal snail cells with a solution that does not contain the signal protein.
B) Incubate normal snail cells with a solution containing signal protein that has been chemically altered.
C) Incubate normal snail cells with a solution that contains a signal protein other than the one being investigated.
D) Incubate mutant snail cells known to be incapable of the cellular response with the signal protein.
E) Incubate mutant snail cells that constantly carry out the cellular response with the signal protein.

Question

Quizplus · Accepted Answer

A control group is necessary to compare the results of the experiment with the snail cells incubated with the signal protein. By incubating normal snail cells with a solution that does not contain the signal protein, the researcher can confirm that any observed cellular response is due to the signal protein and not some other factor present in the experimental setup.

A Researcher Has Isolated a Protein Produced by a Snail