TASK DEFINITION: In this task, you are given a question and answer options for that question. Using this information, you have to classify each text into different topics: medicine, nursery, psychology, chemistry, pharmacology, biology.
PROBLEM: Question: Form B of DNA: 
 Options:  <0> It is formed by a double helix levorotatory with two antiparallel nucleotide chains. <1> It is wider and longer than form A. <2> It has pairs of nitrogenous bases perpendicular to the axis of the helix. <3> Corresponds to dehydrated DNA. <4> It is the minority form presented by DNA under physiological conditions.

SOLUTION: chemistry

PROBLEM: Question: All the following statements describe characteristics of the peptide link EXCEPT: 
 Options:  <0> It has a trans configuration. <1> It is polar but without charge. <2> It forms a single bond by directly joining the α carbons of adjacent amino acids. <3> It does not present rotation around the link. <4> Is flat.

SOLUTION: chemistry

PROBLEM: Question: In protein biosynthesis, base pairing takes place during the translation process between: 
 Options:  <0> RNA and DNA <1> DNA and ribosomal RNA <2> Transfer RNA and ribosomal RNA <3> The messenger RNA and the transfer RNA. <4> 18S ribosomal RNA and 5S ribosomal RNA.

SOLUTION:
chemistry