Which of the following is true of all a-amino acids?
A) All a-amino acids are also D-amino acids.
B) All a-amino acids are also L-amino acids.
C) The amino group is attached to the carbon of the carboxyl group.
D) The amino group and the carbon of the carboxyl group are attached to the same carbon atom.
D
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Mobile belts commonly are associated with convergent plate margins. Indicate whether the statement is true or false
What best explains why glacial ice cores are ideal for examining climatic conditions in Earth's past?
A. are not contaminated by volcanic activity B. record both warming and cooling periods C. provide actual atmospheric temperatures going back millions of years D. provide high-resolution data on both temperature and carbon dioxide E. all of the answers listed here
In a battery, the following oxidation-reduction reactions are taking place: Mn2O3 + ZnO ? 2 MnO2 + ZnWhat is undergoing an oxidation as written?
A. Mn2O3 B. Zn C. MnO2 D. ZnO E. none of the above
Building levees and seawalls is a sure way to prevent property damage from flooding
Indicate whether the statement is true or false.