What are the two primary organelles that work together to produce the necessary enzymes and proteins that all eukaryotic cells need to survive?
nucleus and ribosomes
O plasma membrane and vacuoles
O mitochondria and chloroplasts
O mitochondria and nucleus

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.