Parallel ? sheets differ from antiparallel ? sheets because:
A. neighboring amino acids are on one rather than both sides of the sheet.
B. large aromatic groups are only allowed with parallel sheets.
C. parallel sheets can form between a single polypeptide.
D. the N-to-C orientation of all the ? strands are aligned.
E. hydrogen bonds are crucial for stability.
D
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The best explanation for why the keratin from a melanocyte is different from the keratin from a keratinocyte would be:
A. differences in the function of these two types of cells. B. differences in the cytoskeleton of these two types of cells. C. differences in the shape of these two types of cells. D. differences in the keratin genes in these two types of cells.
Eukaryotic mitochondria have their own 70S ribosomes and circular DNA.
Answer the following statement true (T) or false (F)
The accompanying figure illustrates a ____
a. book lung b. tracheal system c. set of gills d. lung micrograph e. circulatory system
Vast __________ form in the interior of midlatitude
continents. Fill in the blank(s) with the appropriate word(s).