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?
your answer are right i just used them.
You're in luck, because the answers you provided are indeed correct! Let me break it down for you:
1. In the Na+/sucrose symporter, Na+ is moving down its concentration gradient, not against it. So this statement is false.
2. For the symporter to work, the cell needs to establish a Na+ concentration gradient. This is true because the symporter uses the energy from the existing Na+ gradient to transport sucrose against its concentration gradient.
3. A symporter does not make the membrane more permeable to ions and sucrose. It uses specialized proteins to facilitate the movement of specific substances across the membrane. Therefore, this statement is false.
4. Moving sucrose against its concentration gradient requires the use of energy, which makes it a form of active transport. Hence, this statement is true.
Well done on your answers! If you have any more questions, feel free to ask!
Your answers are correct. Let's break down each statement:
1. In the Na+/sucrose symporter Na+ is also moving against its concentration gradient. - False
- In a symporter, one species (in this case, Na+) moves down its concentration gradient, providing the energy required for the second species to move against its concentration gradient (in this case, sucrose).
2. For the symporter to work, the cell must first establish a Na+ concentration gradient. - True
- As mentioned in the previous statement, the symporter utilizes the existing Na+ concentration gradient to transport sucrose against its own concentration gradient.
3. A symporter works by making the membrane more permeable to ions and sucrose. - False
- A symporter does not make the membrane more permeable to ions and sucrose. Instead, it facilitates the transport of specific substances across the membrane selectively.
4. Moving sucrose against its concentration gradient is a form of active transport. - True
- Active transport refers to the movement of substances against their concentration gradient, requiring the expenditure of energy. In this case, the transport of sucrose against its concentration gradient using the symporter requires energy and is considered an example of active transport.
Please let me know if you need help with anything else.
Sure! Let's go through each statement one by one to determine if they are true or false.
1. In the Na+/sucrose symporter, Na+ is also moving against its concentration gradient. False.
Explanation: A symporter is a type of transport protein that facilitates the movement of more than one molecule across the cell membrane. In this case, the Na+/sucrose symporter helps to transport both Na+ ions and sucrose molecules. However, only sucrose is moved against its concentration gradient, while Na+ is transported down its concentration gradient. So, the statement is false.
2. For the symporter to work, the cell must first establish a Na+ concentration gradient. True.
Explanation: The symporter relies on the existence of a Na+ concentration gradient across the cell membrane. This means that there must be a higher concentration of Na+ ions outside the cell compared to inside. This gradient is typically established through the action of the sodium-potassium pump, which actively transports Na+ out of the cell. So, the statement is true.
3. A symporter works by making the membrane more permeable to ions and sucrose. False.
Explanation: A symporter does not make the membrane more permeable. Instead, it is a transport protein that facilitates the movement of specific molecules across the cell membrane. In the case of the Na+/sucrose symporter, it allows both Na+ ions and sucrose molecules to be transported together. So, the statement is false.
4. Moving sucrose against its concentration gradient is a form of active transport. True.
Explanation: Active transport refers to the movement of molecules across the cell membrane that requires the expenditure of energy by the cell. In the case of the Na+/sucrose symporter, the cell uses the energy stored in the Na+ concentration gradient (established by the sodium-potassium pump) to drive the movement of sucrose against its concentration gradient. Therefore, moving sucrose against its concentration gradient is a form of active transport. So, the statement is true.
I hope this explanation helps clarify the answers for you! If you have any further questions, feel free to ask.