Read the following paragraph from the section "sleep cleans the slate."

another possibility is that sleep may clean out toxic proteins that are bad for the brain. during sleep, the space between brain cells increases. this allows harmful waste to be flushed out. in 2013, researchers published a study showing that the brain uses sleep to get rid of toxic proteins. this waste removal system could be one of the major reasons why we sleep. by removing these toxic proteins from the brain, sleep may keep people from getting brain diseases.

how does this paragraph contribute to the article's main idea?

a: it proves that toxic proteins are more present in the brain at night.

b: it explains exactly how harmful waste is flushed from the body.

c: it provides one possible answer to the question of why people sleep.

d: it describes the reasons why rem sleep is more important than nrem sleep.

Using the periodic table, complete the table to describe each atom. type in your answers

Achemist at a pharmaceutical company is measuring equilibrium constants for reactions in which drug candidate molecules bind to a protein involved in cancer. the drug molecules bind the protein in a 1: 1 ratio to form a drug-protein complex. the protein concentration in aqueous solution at 25 ˚c is 1.74 x10-6 m . drug a is introduced into the protein solution at an initial concentration of 2.00 x10-6m. drug b is introduced into a separate, identical protein solution at an initial concentration of 2.00 x10-6m. at equilibrium, the drug a-protein solution has an a-protein complex concentration of 1.00 x10-6m, and the drug b solution has a b-protein complex concentration of 1.40 x10-6m.a. calculate the kc value for the a-protein binding reaction.b. calculate the kc value for the b-protein binding reaction.c. assuming that the drug that binds more strongly will be more effective, which drug is the better choice for further research?

Asolubility table shows that almost all compounds of group 1 metals are soluble in water. this general rule tells you that mgi2 is soluble rbno3 is soluble cacl2 is soluble co2 is soluble