Explain how model making helped Watson and Crick to establish the structure of DN
a. They decided to combine what was known about the chemical content of DNA with information from X-ray diffraction studies
b. They built scale models of the components of DNA
c. Then they attempted to fit them together in a way that agreed with the data from separate sources
d. They made several arrangements of the scale model until they found the best one that fitted all the data
Distinguish between the chromosomes of eukaryotic cells and prokaryotic cells.
a. Chromosomes are associated with «histone» proteins in eukaryotes but not in prokaryotes
b. Chromosomes are linear in eukaryotes but circular in prokaryotes
c. Chromosomes are located in the cytoplasm in prokaryotes, but within the nucleus in eukaryotes
Outline the role of the enzyme helicase in replication.
Unwinds/separates strands/double helix (by breaking hydrogen bonds)
