Food webs differ from food chains in that they *
O
A. identify the keystone species within an ecosystem
O
B. show the actual movement of energy within the ecosystem
O
C. show the distribution of biomass within an ecosystem
O
D. show more of the available feeding relationships in an ecosystem

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.