In the scientific method, what precedes the formation of the hypothesis?

In a water molecule,

What are the basic structures that make up a nucleotide?

Single-celled prokaryotes

Research indicates that ibuprofen, a drug used to relieve inflammation and pain, is a mixture of two enantiomers; that is, molecules that

Which level of protein structure do the α helix and the β pleated sheet represent?

If one strand of a DNA molecule has the sequence of bases 5’ATTGCA3′, the other complementary strand would have the sequence

The nucleus of a nitrogen atom contains 7 neutrons and 7 protons. Which of the following is a correct statement concerning nitrogen?

Lactose, a sugar in milk, is composed of one glucose molecule joined by a glycosidic linkage to one galactose molecule. How is lactose classified?

Membrane-bounded vesicles that contain enzymes that break down fatty acids while producing hydrogen peroxide as a waste product are called