medium · MCAT bio-biochem
Which of the following describes the secondary active transport of glucose in the intestinal lining?
- The glucose transporter directly hydrolyzes ATP to actively pump glucose inward.
- Glucose slips directly through the phospholipid bilayer since it is a small nonpolar solute.
- Glucose passively moves down its gradient through a dedicated channel protein, needing no energy.
- Glucose is moved against its gradient by coupling its flow to the downhill movement of Na⁺.
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