Select the correct statement regarding epithelia. a) simple epithelia form impermeable barriers. b) stratified epithelia are present where protection from abrasion is important. c) stratified epithelia are tall, narrow cells. d) pseudostratified epithelia consist of at least two layers of cells stacked ontop of one another

You have just sequenced a new protein found in mice and observe that sulfur-containing cysteine residues occur at regular intervals. what is the significance of this finding? it will be important to include cysteine in the diet of the mice. cysteine residues are required for the formation of α helices and β pleated sheets. cysteine residues are involved in disulfide bridges that form tertiary structure. cysteine causes bends, or angles, to occur in the tertiary structure of proteins.