This figure shows the structure of a single domain from the S. aureus ?-hemolysin. Considering that this hemolysin creates a pore within cell membranes, one could predict:
A. hydrophobic residues would be found equally on both sides of the ? sheets.
B. hydrophilic residues would be found equally on both sides of the ? sheets.
C. hydrophilic residues would predominate on the interior of the pore structure.
D. hydrophobic residues would predominate on the interior of the pore structure.
E. hydrophilic residues would predominate on the exterior of the pore structure.
C
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A. omasum. B. rumen. C. reticulum. D. cecum. E. rumen and reticulum.
You would expect the bones of a growing child to have extremely active
a. osteoclasts. b. fibroblasts. c. osteoblasts. d. adipocytes. e. chondrocytes.
What happens to anaerobic organisms when
they are exposed to oxygen?
a. they become anaerobic b. they die c. they increase their metabolic rate d. they start rapidly reproducing e. nothing happens to them
Proteins are assembled from the instructions found in which molecule?
a. mRNA b. ribosome c. tRNA d. DNA