Bacteria and fungi feed on a dead log. these organisms act as decomposers by breaking
down the matter in the log and returning
vital nutrients to the ecosystem. which of
the following terms describes the role of the bacteria and fungi in the environment?
a.) producer
b.) habitat
c.) niche
d.)community

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.