D-glucose is added to cells and the rate of glucose transport is plotted against D-glucose concentration.In the presence of the D-galactose derivative 6-O-benzyl-D-galactose,the curve is shifted to the right,indicating that D-glucose and the D-galactose derivative both compete for a place in the binding site.Which of the following is true?

Question

Quizplus · Accepted Answer

The presence of 6-O-benzyl-D-galactose, which competes with D-glucose for the same binding sites, means that some of those sites will be occupied by the derivative instead of glucose (A), reducing the number of sites available for glucose at any given concentration (B). This competition necessitates a higher concentration of glucose to achieve the same rate of transport, as the curve shift to the right indicates (D). Since all these statements support the described competitive inhibition scenario, they are all true.

D-Glucose Is Added to Cells and the Rate of Glucose