Which of the following is not found within DNA?

thymine

phosphodiester bonds

complementary base pairing

amino acids

Amino acids.

Explanation:

DNA is the genetic material of all the organisms except some viruses. DNA has the ability to replicate and produce daughter DNA cells by the process of replication.

DNA is made of polymers of nucleotides. DNA consists of nitrogenous base, in which adenine is linked with thymine, cytosine with guanine thriugh hydrogen bonding, shows complementary base pairing. Pentose deoxyribose sugar and phosphate group. The DNA molecules are linked together through phosphodiester bonds. Amino acids is present in protein.

Thus, the answer is option (4).