Glycerol and fatty are the monomers of

Which entry is in the wrong position in the table?

Molecules like glucose and amino acids are not lipid soluble, so cannot cross the cell membrane by simple diffusion. instead, they are shuttled across by carrier proteins in the membrane from high to low concentration. does this process require energy from the cell? this is an example of what type of molecular movement?

How do light years astronomers to determine the ages of distant objects in space ?