In the structure of the cell membrane,the outer head of the lipid molecule is:

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?

The diagram given below represents a fluid mosaic model of the plasma membrane. Match the components marked as $A, B, C, D$ and $E$ in the diagram below from the list $(i)$ to $(vii)$.
$(i)$ Sugar $(ii)$ Protein $(iii)$ Lipid bilayer $(iv)$ Integral protein $(v)$ Cytoplasm $(vi)$ Cell wall $(vii)$ External protein

The plant cell cytoplasm is surrounded by both cell wall and cell membrane. The specificity of transport of substances is mostly across the cell membrane,because $..........$

For the cell membrane, the name "plasmalemma" was given by:

That the cell membrane is selectively permeable can be best deduced by