Which of the following describes the quaternary structure of a protein A. Alpha helix
B. Three dimensional shape
C. Beta pleated sheet
D. Arrangement of subunits into a whole

"hydrogen bonding is the attraction of h atoms in the water molecule (slight + charge) to o atoms in a neighboring water molecule (slight - charge); it is a weak interatomic force. but it is still strong enough to the water molecules "stick" together."

while cooking a piece of 1/2 pound beef steak, a cast iron pan (2.4kg in weight) was heated 260 celsius.

since electrons are negative the answer is neagtaive