5. Measure the length of the day on the spring and fall equinoxes for latitudes 0, 15, 30, 45, 60, 75, and 90. With the exception of the North and South poles,
(a) What can you say about the length of day for the fall and spring equinoxes?
(b) What happens above 66½° (the Arctic Circle) on the equinoxes?
(c) Where does the sun rise and set on the equinoxes?
what is the answer to all of them

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.