Homework Help: Biology

Posted by Cady on Thursday, September 29, 2011 at 12:05am.

Animal cells can take up sucrose against its concentration gradient using a Na+/sucrose symporter. Indicate if the following statements are true or false.

1. In the Na+/sucrose symporter Na+ is also moving against its concentration gradient. False
2. For the symporter to work, the cell must first establish a Na+ concentration gradient. True
3. A symporter works by making the membrane more permeable to ions and sucrose. False
4. Moving sucrose against its concentration gradient is a form of active transport. True

I'm not sure if these answers are right, I have already tried google and what I have read doesn't really help me, can someone please check the answers?

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