The structure of epidermal growth factor includes which of the following?
A) four helical segments
B) only b-pleated sheet
C) both a-helix and b-pleated sheet
D) four cysteine residues which form two disulfide bridges
C
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The frictional force on a sliding object is 500 N. The applied force needed to maintain a constant velocity is
A. more than 500 N. B. 500 N. C. less than 500 N. D. none of the above
Compared to the age of Earth accepted as correct today, how did 17th and 18th century proponents of catastrophism envision the Earth's age?
A) They believed Earth to be much younger than current estimates. B)They believed Earth to be much older than current estimates. C)They believed it to be about the same as current estimates, give or take a few million years. D)None of the above_they didn't really address the age of Earth.
Addition of harmful substances to the environment is called eutrophication.
Answer the following statement true (T) or false (F)
What term is used to describe "Islamic law"?
A) Koran B) Islamists C) Shi'a D) Shari'a E) Sunni