What holds the sides of the dna ladder together?

Your sense of touch depends upon: a. direct contact b. heat chemical c. reactions d. pain

The starting materials in a nuclear change have a total mass of 2.3465 x 10-27 kg. after the change, the resulting materials have a mass of 2.3148 x 10-27 kg. how much energy was released during the change? 2.85 x 10-12 2.08 * 10-10 j 0 211 * 10-10 j 8.56 * 10-43

What part of the body contains bile, an enzyme that break down lipids?