umm guys my sis is under the covers and i hear weird squeaking noises and squirting sounds i think she is using a squirt bottle and cleaning her phone.. but

Select the correct answer from each drop-down menu proteins are

Amino acids contain the elements carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur. of the 20 amino acids found in humans, 11 are called "nonessential" because they can be manufactured by the body when needed. which elements in these 11 amino acids are commonly obtained from the metabolism of sugar molecules?

Identify two examples of chemical reactions that you have encountered during the last week. identify an exothermic and endothermic reaction. explain.