$Na^+/K^+$ dependent $ATPase$ activity helps in the transport of:

  • A
    $K^+$ inward,$Na^+$ outward
  • B
    $K^+$ inward only
  • C
    $Na^+$ inward only
  • D
    $K^+$ outward,$Na^+$ inward

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Who proposed the concept of the unit membrane?

Cut pieces of beetroot do not leave the colour in cold water but do so in hot water. Explain.

Assertion : $A$ cell membrane shows fluid behaviour.
Reason : $A$ membrane is a mosaic or composite of diverse lipids and proteins.

$A$: Lipids are arranged within the cell membrane with the hydrophobic tails towards the inner part.
$R$: This ensures that the non-polar tail of saturated hydrocarbons is protected from the aqueous environment.

Which is the most widely accepted model to explain the structure of the cell membrane?

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