In which method of transport in the plasma membrane is a carrier molecule not required?

Explain: Facilitated Diffusion and its properties.

The movement of water through the suberized layer of the endodermis under pressure is called:

Consider the following statements and choose the correct answer:
$I.$ Carrier proteins are needed by both facilitated diffusion and active transport and are sensitive to inhibitors that react with protein side chains.
$II.$ Different types of proteins present in the membrane play a major role in both active as well as passive transport.
$III.$ The carrier proteins needed by facilitated and active transport are specific.
$IV.$ There is no need of energy to pump molecules against a concentration gradient in active transport.
$V.$ Transport rate reaches a saturation point when all the active proteins are used.

The transport rate reaches a maximum when:

What is meant by influx and efflux?