Plz
which statement about this diagram is correct?
a) molecule 1 is dna because it is a double helix.
b) molecule 1 is rna because it contains thymine.
c) molecule 2 is rna because it is the only molecule that contains four types of bases.
d) molecule 2 is dna because it can pair with another molecule.

The right statement about the diagram is a) Molecule 1 is DNA because it is a double helix.

Explanation:

DNA and RNA are nucleic acids that are composed by desoxinucleotids and ribonucleotids, respectibly. DNA is characterized by a double strand while RNA has a simple strand. Another difference between them is the kind of nitrogen bases each contain: DNA has Adenine, Thymine, Cytosine and Guanine while RNA is formed by Adenine, Uracil, Cytosine and Guanine. It means that both contain four bases but in RNA Thymine is replaced by Uracil.

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