Converse of object

• form: DNA molecules have two distinct strands which are held together by weak hydrogen bonds to form a double helix.

• discover: Watson and Crick explained the x-ray data of Wilkins and Franklin, and so discovered the double helix.

• have: Less than a year later he and Crick had the double helix.

• make: DNA is a double helix made from two strands which are joined together by pairs of bases.

Adjective modifier

• famous: Think of DNA and the famous double helix usually springs to mind.