Penicillin and many other antibiotics are b-lactams. What is the composition of the b-lactam ring?
A) 1 carbon atom and 3 nitrogen atoms
B) 2 carbon atoms and two nitrogen atoms with the carbon atoms adjacent
C) an alternating sequence of 2 carbon atoms and two nitrogen atoms
D) 3 carbon atoms and one nitrogen atom
D
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Compared to the amount of electric current in the filament of a lamp, the amount of current in the connecting wire is
A. often less. B. definitely less. C. the same. D. actually more.
If a species of frogs becomes threatened because they can only live in a narrow range of temperatures, they would be classified as a(n) ____________________
Fill in the blanks with correct word
Carbon capture and storage (CCS) involves restoring degraded wetlands so that they will absorb massive amounts of carbon from the atmosphere
Indicate whether the statement is true or false
Which occurs last?
A) fully developed warm front B) cut-off cyclone C) occluded cyclone D) open wave E) fully developed cold front