Which of the following is the mechanism of peptide bond formation during protein synthesis?
A) Nucleophilic attack on the carbon of a carbonyl group by an amino group.
B) Nucleophilic attack on the nitrogen of an amino group by the carbon of a carbonyl group.
C) Nucleophilic attack on the nitrogen of an amino group by the oxygen of a carbonyl group.
D) Nucleophilic attack on the oxygen of a carbonyl group by an amino group.
A
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________ mineral deposits form through the circulation of hot, chemically active waters
Fill in the blank(s) with correct word
Each year, scientists measure the magnitude of how many earthquakes?
A. 100 B. 1,000 C. 25,000 D. 200,000 E. 1,000,000
The deviation of time zones covering 15 degrees of longitude is due to ________.
a. organizing according to latitude. b. significant adjustments by individual countries c. covering 15 degrees of longitude d. covering 25 hours around the world e. the 2 hour difference from adjustment time zones
Which of the following circulation patterns is characteristic of a cyclone in the Northern Hemisphere?
A. moist air flowing toward Tibetan low B. dry air flowing from Siberian high C. dry air flowing from the Tibetan low D. moist air flowing toward Siberian high