Who proposed the fluid mosaic model?

Select the correct statement from the following regarding the cell membrane.

$A$: 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.

In which of the following conditions should a slice of fresh beet root release more betanin pigment?

Which of the following substances undergoes diffusion at the fastest rate?

Smaller,lipid-soluble molecules diffuse faster through the cell membrane,but the movement of hydrophilic substances is facilitated by certain transporters which are chemically $.......$