James Watson and Francis Crick
a. were both English researchers working at
Cambridge University.
b. performed elegant experiments in DNA
chemistry.
c. constructed an accurate model of the DNA
molecule illustrating its structural simplicity.
d. performed experiments that convinced scientists
that DNA is a double-stranded molecule.
e. did all of these
Answer: c
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You have identified a protein that you hypothesize is a sigma factor in E. coli that has not yet been characterized. You have purified the protein. What types of experiments could you perform to investigate whether or not the protein is a sigma factor?
What will be an ideal response?
During exocytosis, the phospholipids present in the vesicle membrane will end up in the plasma membrane.
Answer the following statement true (T) or false (F)
All of the following are part of a plant's shoot system EXCEPT
A) flowers. B) mycorrhizae. C) leaves. D) buds. E) stem.