1.3 Transport in cells

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Question 17

Medium73%

The graph below shows the rate of entry of two different substances, $X\,$ and $Y$ , into a human cell across the cell surface membrane at different external concentrations:

Rate of entry graph

Which of the following options correctly identifies substance $X$ , substance $Y$ , and the factor that limits the rate of entry of substance $Y\,$ at high external concentrations?

Substance $X$ : Oxygen; Substance $Y$ : Glucose; Limiting factor for $Y$ : Density of carrier proteins in the membrane

Substance $X$ : Sodium ions; Substance $Y$ : Carbon dioxide; Limiting factor for $Y$ : Surface area of the cell membrane

Substance $X$ : Carbon dioxide; Substance $Y$ : Sodium ions; Limiting factor for $Y$ : Rate of aerobic respiration

Substance $X$ : Ethanol; Substance $Y$ : Glucose; Limiting factor for $Y$ : Concentration gradient of glucose

1.3 Transport in cells

Question 17

1.3 Transport in cells Questions

1.3 Transport in cells

Question 17

1.3 Transport in cells Questions