A protein's secondary structure arises due to interactions between amino acids. Two common secondary structures found in many proteins are α helices and β sheets. Classify the statements as pertaining to α helices or β sheets.

a. flat, zig-zag-like structure
b. two adjacent polypeptide chains hold each other in place with hydrogen bonds
c. coil-like structure around a central axis
d. form long, thin structures important for transmembrane proteins

Which term best describes the form sound takes as it travels away from a drum (a- gas)(b-music) ( c-waves) (d-particles

How many moles of al3+ ions are in 1.25 moles of al2o3

Which explanation is true about what happens to a ray of light when it strikes a mirror? a. a light ray is transmitted toward a mirror at a certain angle. the light ray is then reflected by the mirror at an equal angle but in the opposite direction of the transmitted ray. b. an incident ray strikes a mirror at an angle with a line perpendicular to the mirror. the light ray is then reflected at an angle equal to the angle of incidence but on the opposite side of the perpendicular line. c. a reflecting ray strikes a mirror at an angle with a line perpendicular to the mirror. the light ray is then refracted at an angle equal to the angle of the reflecting ray and on the same side of the perpendicular line. d. an incident ray strikes a mirror at an angle with a line parallel to the mirror. the light ray is then transmitted at an angle equal to the angle of incidence but on the opposite side of the parallel line. you so much! : -d take the time to try and answer correctly.