A researcher is interested in the mode of transport across the cell membrane of

Question

A researcher is interested in the mode of transport across the cell membrane of three different substances: A, B, and C. His data are reported in the graphs associated with the following questions. Initial rate of transport into the cell BorC 98. The graph above shows the initial rate of transport for each substance when the cells are placed in solutions of different concentrations of A B, and C. Based on these data, substance A is transported via A) active transport. B) facilitated transport. C) passive transport. D) simple diffusion. E) choices A, B, and C 99. Based on the same graph, substances B and C A) show saturation kinetics B) are transported by a transporter protein C) do not move by simple diffusion D) choices A and B only E) all of the above

Explanation / Answer

98. Based on the above the graph, substance is transported across the cell membrane by simple diffusion. Hence, option “d” is correct.

99. Based on the graph only, all the option are correct as it is showing transport by transporter proteins not by diffusion. Hence, option “e” is correct.

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