The Graph Below Shows the Results of a Study Using

question 231

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.

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