The diagram below shows a food web. If a certain organism is a producer, what best explains its position in the food web?
1. B, because organism B utilizes radiant energy from the sun
2. A, because organism A has the same role as the corn
3. B, because organism B has the same role as the racoon
4. A, because organism A utilizes energy from the beetle

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.