Name two ways cells are able to move molecules against their concentration gradient. What is this...

Name two ways cells are able to move molecules against their concentration gradient. What is this type of transport called and is it possible to move molecules against their concentration gradient without using ATP?

Expert Solution

molecules can move across the membrane against the concentration gradient via

i) primary active transport: protein pumps in the membrane pump the molecules against the concentration gradient using the energy of ATP.

ii) secondary active transport: secondary active transport uses the energy of concentration gradient of a molecule, one molecule is transported down the concentration gradient, using the energy released via this transport a molecule is transported against the concentration gradient.

the concentration gradient of the molecule is generated by the action of a primary active transporter which uses the energy of ATP to pump molecules against the concentration gradient, so ATP is required in secondary active transport also.

the type of transport is called active transport, ATP is required for the transport of molecules against the concentration gradient, ATP is directly used in primary active transport, and secondary active transport also requires ATP to create concentration gradient of a molecule.

it is not possible to move molecules against their concentration gradient without using ATP.

gladiator answered 1 year ago

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