Question

The headgroup in a cerebroside is a ____________________.
    A.   phosphate
    B.   amino acid
    C.   saccharide
    D.   nitrogenous base

Animals store glucose in the form of glycogen because ___________________.
    A.   storing glucose in glycogen increases the osmolarity of the cell.
    B.   storing glucose in glycogen does not require any energy.
    C.   extra energy is released when glucose is stored in glycogen.
    D.   freeing glucose from glycogen converts it into fructose.
    E.   storing glucose in glycogen lowers the osmolarity of the cell.

Answer 1

1)C.saccharide

Cerebroside is a neutral compound that consists of ceramide(sphingosine+fatty acid) and a monosacharide .hete monosacharide is the head group while other is tail.

2)E.storing glucose in glycogen lowers the osmolarity of the.

When glucose is present itself in the cell there exerts a high osmotic pressure that causes entry of water into the cell since glucose is soluble in water. When glucose is stored as glycogen it decreases osmotic pressure and there by osmolarity.