Which statement correctly describes glucose uniport?
Understand the Problem
The question is asking to identify the correct statement describing glucose uniport. Uniport is a type of facilitated diffusion that involves the movement of a single molecule across a cell membrane down its concentration gradient using a specific transport protein.
Answer
A glucose uniport transports only glucose across a cell membrane via facilitated diffusion.
A glucose uniport is a transport protein that moves only glucose across a cell membrane, facilitating its diffusion either into or out of the cell depending on the concentration gradient.
Answer for screen readers
A glucose uniport is a transport protein that moves only glucose across a cell membrane, facilitating its diffusion either into or out of the cell depending on the concentration gradient.
More Information
Uniporters are integral membrane proteins that are involved in facilitated diffusion. They bind to a specific molecule and transport it across the membrane down its concentration gradient. This process doesn't require energy input from the cell.
Tips
A common mistake is confusing uniport with other types of membrane transport such as symport or antiport, which involve the transport of multiple molecules. Another mistake is thinking that all glucose transport requires energy, while uniport is a form of passive transport.
Sources
- The plasma membrane of liver cells contains a glucose uniport that ... - homework.study.com
- Transport of Small Molecules - The Cell - NCBI Bookshelf - ncbi.nlm.nih.gov
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