Question

what would be your conclusion if most of the cells in the negative control were red?
a) all cells survived as expected
b) the negative control confirms the validity of the experiment
c) our experimental setup is flawed
d) no conclusion can be made

Explanation:

A negative control in an experiment is designed to show no positive result (here, red cells likely indicate a positive, non-control outcome). If most cells in the negative control are red, this means the control is not behaving as intended, which signals a problem with the experimental setup.

Answer:

c) Our experimental setup is flawed