Question

In this diagram, you see that culturing blue cells with green cells leads to a proliferative response in the green cells. Based on Experiments 1 & 2, which is the most accurate conclusion about the inducer’s mode of signaling?

a.Juxtacrine- requires cell contact

b.It can pass through aluminium foil

c.Paracrine- inducer released from a distance

d.Autocrine- inducer is made by the cell it acts on

Answer 1

c.Paracrine- inducer released from a distance

Signals cannot pass through the aluminium foil.In paracrine signalling even though signals are produced from nearby cells, it cannot pass through aluminium foil.

where as in option a, Juxtacrine requires close contact, hence it is not possible in both the experiments.

where as in option d, it is wrong with our experiment because blue cells need green cells to proliferate.