A student concludes that a virus is unable to reproduce on its own. Which piece of evidence supports this conclusion?Apresence of a protective envelope in the virusBabsence of structures that make proteins in the virusCabsence of structures that allow locomotion in the virusDpresence of a genetic material in the viru

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.