What are the components of dna

DNA has three types of chemical component: phosphate, a sugar called deoxyribose, and four nitrogenous bases—adenine, guanine, cytosine, and thymine. Two of the bases, adenine and guanine, have a double-ring structure characteristic of a type of chemical called a purine.

DNA has three types of components:

Explanation:

DNA is composed up of molecule nucleotide and each nucleotide comprises of a Deoxyribose sugar, a phosphate group, and nitrogenous bases.

Deoxyribose sugar.is a five carbon or a pentose sugar.

phosphate group:help in the formation of DNA backbone.

nitrogenous bases: is used in the formation of nucleotides. The nitrogen bases are  purines( adenine, guanine), pyrimidines (cytosine, and thymine).

Responder:

Los antígenos desencadenan respuestas inmunes específicas. Los antígenos se encuentran generalmente en la superficie de los patógenos y son exclusivos de ese patógeno en particular. El sistema inmunológico responde a los antígenos produciendo células que atacan directamente al patógeno o produciendo proteínas especiales llamadas anticuerpos.

Explicación:

¿Qué desencadena la formación de barreras adquiridas del sistema inmunológico?