What happens if a cell is unable to divide by mitosis

In dna, only the_ varies from one nucleotide to another. base phosphate sugar amino acid

What is the significance of the protein-lined pits? a. protein attracts other proteins needed for atp synthesis within the cell. b. protein-lined pits are able to transport one molecule at a time down the concentration gradient within the cell. c. the polarity of proteins allows other polar molecules to attach and be transported in the cell by transport channels. d. receptors within the pits allow ligands to fuse and be transported into the cell by endocytosis.

What do all of the above organisms have in common