Which best matches a type of genetic material with its description? Nucleotides form a helical structure that is called a gene.
Genes combine to form structures called nucleotides.
Chromosomes create genes.
DNA is located in the nucleus

The double bond between a carbon atom and two oxygen atoms (a molecule of carbon dioxide) has two characteristics. what are they? a.an ionic bond is formed between the oxygen and carbon atoms. b.four valence electrons are shared. c.two valence electrons are shared. d.valence electrons are shared between oxygen atoms.