Which of the following describes the proper order of structures that a carbon dioxide molecule diffuses through after leaving the blood?
a. alveolar space; surfactant layer; capillary wall
b. capillary wall; alveolar space; surfactant layer
c. alveolar space; capillary wall; surfactant layer
d. capillary wall; surfactant layer; alveolar space

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.

What if the yeast were extremely active and produced more than 100ml gas. would you know? why/why not

One drawback of dams is that they can flood land upstream from the dam and reduce water flow downstream from the dam. a. true b. false