Which description best explains Watson and Crick's DNA model?

A.

DNA is a single–stranded molecule that has nitrogenous bases toward its exterior.

B.

DNA is a double helix made of two strands linked together with hydrogen bonds.

C.

DNA is a double helix that contains nitrogenous bases toward its exterior

B.

Explanation:

double helix and linked with hydrogen bonds

clinically, some people often have repeated allergies, eczema and respiratory infections or other parts of the infection, in this case, in addition to some routine tests such as tests for white blood cells, immunoglobulin series, lymphocyte subsets, etc., the five immune immunoglobulin tests are also necessary.

which are post-impressionist paintings? check all that apply?

explanation:

post-impressionism is a predominantly french art movement that developed roughly between 1886 and 1905, from the last impressionist exhibition to the birth of fauvism. post-impressionism emerged as a reaction against impressionists' concern for the naturalistic depiction of light and color.

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