In 1952, Rosalind Franklin took an X-ray photograph revealing the structure of DNA. James Watson and Francis Crick follwed up on this discovery in 1953. They discovered that the molecule has a shape specific to just that molecule.

Which enzymes break down carbohydrates?

Pulmonary arteries carry highly oxygenated blood. true or false?

The model illustrates a process by which a substance is taken up by a cell. which statements describe the process? a. the model shows the process of endocytosis. b. the process shown in the model requires energy from the cell. c. the cell membrane in the model remains intact throughout the process. d. the model shows the process of facilitated diffusion.