Which type of biochemical is shown in the diagram?

polysaccharide
nucleic acid
lipid
dipeptide

From the picture you are showing me, the last option is the correct one, it means dipeptide. Remember that a dipeptide is a peptide composed of two amino-acid residues. And that is shown in the image. Hope this helps

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later