Extended Response

Some cells have carrier proteins that transport sugar molecules and hydrogen ions into the cytosol at the same time. These proteins move sugar up their gradient as hydrogen ions move down their gradient.

Part A How would the transport of sugar into these cells affect the pH of the cells' external environment?

Part B What would happen to the transport of sugar if hydrogen ions were removed from the external environment?

Pay close attention to questions that contain words such as not, only, rather, and some, because these words can often help you eliminate answer choices.

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