This image depicts the chemical structure of cytosine. It shows a hexagonal ring with nitrogen atoms at positions 1 and 3, and a primary amine group attached to carbon 4. The two remaining positions ...

Beyond the ladder-like structure described above, another key characteristic of double-stranded DNA is its unique three-dimensional shape. The first photographic evidence of this shape was ...

According to this rule, the amount of adenine is equal to the amount of thymine, and the amount of guanine is equal to the amount of cytosine in a double-stranded DNA molecule. This 1:1 ratio of A:T ...

The original model of DNA structure created by Crick and Watson ... There are four types of base - adenine, thymine, cytosine and guanine. All human cells contain DNA. The 3 billion pairs of ...