The Graph Below Shows the Results of a Study Using

Multiple Choice

The graph below shows the results of a study using human skin cells grown in culture.Identical cells were grown in culture with or without the proteins laminin or collagen in the substrate of the culture.After a defined period of time, the cell surface areas were measured. Which statement best provides a conclusion that can be drawn from this study?

A) The presence of laminin in the extracellular matrix of human skin cells is essential for cell growth.
B) The presence of collagen in the extracellular matrix of human skin cells is essential for cell growth.
C) Collagen plus laminin stimulate human skin cell growth to a greater extent than either collagen or laminin alone.
D) Low concentrations of collagen alone or laminin alone are much less effective in stimulating human skin cell growth than high concentrations of collagen.
E) Combining collagen and laminin is more effective at stimulating human skin cell growth than high concentrations of collagen.