Which statement about amino acids is false?
A) Every amino acid contains a carboxyl group.
B) The side chain or R group is the same in each amino acid.
C) In a polypeptide, amino acids are joined by peptide bonds.
D) One end of a polypeptide, the N terminus, contains a free amino group.
B) The side chain or R group is the same in each amino acid.
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Consider a living plant cell in a living leaf that is not wilted. The solute potential (?S) of such a cell
____ than that in the fluids surrounding the cell.
a. is typically lower b. varies widely from higher to lower c. is typically higher d. is typically about the same as e. is typically less negative
If scientists ask "Why" questions about behaviors of organisms, the questions are , but if scientists ask "How" questions about behaviors of organisms, the questions are _.
A. philosophical; physiological B. dominant; recessive C. developmental; anatomical D. ultimate; proximate E. proximate; ultimate
What is an area of the Earth's surface currently undergoing primary succession?
A. Shallow seas with low productivity B. Volcanoes in Iceland C. Redwood forests along the northwestern U.S. coast D. Old orange groves in Florida
Figure 2.2 depicts the (primary/secondary/tertiary) structure of a protein.
Fill in the blank(s) with the appropriate word(s).