Active transport across a biomembrane involves

When cylindrical pieces of beetroot are washed with cold water or ice,the anthocyanin pigment does not leak out. What does this indicate about the behavior of the cell membrane?

Identify the structures marked as $A, B, C$ and $D$ with respect to the fluid mosaic model of the plasma membrane.

Which one statement regarding the plasma membrane is correct?

Which one of the following does not differ in $E. coli$ and $Chlamydomonas$?

The process of sucking of fluid from the cell surface is called as