Uphill transport is a type of

When does the rate of active transport reach its maximum?

Choose the correct sentences for diffusion:
$(1)$ In diffusion,molecules move in a random fashion.
$(2)$ Diffusion rates are affected by the gradient of concentration.
$(3)$ Diffusion is a slow process and is dependent on a 'living system'.
$(4)$ Movement by diffusion is passive.

Which of the following processes requires membrane proteins?

$A-$ In an antiport,both molecules move in opposite directions.
$R -$ In symport,only one molecule crosses the membrane in the same direction.

Given below is a table. Fill in the gaps.

Property	Simple Diffusion	Facilitated Transport	Active Transport
Highly selective	No	Yes	...
Uphill transport	...	...	Yes
Requires $ATP$	...	...	...