What is the role of CREB in a white blood cell?
a. It is a tumor suppressor protein.
b. It stimulates the activity of p53.
c. It binds to CRE and activates cell division.
d. It increases cAMP production during an infection.
e. It decreases cAMP production during an infection.
C
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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.
Diamond shaped scales on lower order fish like bowfins and sturgeons
A) ganoid B) cycloid C) ctenoid D) placoid
Answer the following statements true (T) or false (F)
1.Soil scientists use relative amounts of sand, silt, and clay to classify soils. 2.The B horizon soil consists of most of the humus found in soil. 3.The "wearing away" of soil by wind and water is called erosion. 4.Chemically, nutrients from inorganic fertilizers are not equivalent to nutrients from manure or compost. 5.A typical, mature tree consumes only about 5 gallons of water a day.
Distribution of daughter chromosomes derived from sister chromatids during meiosis II then leads to a total of ______ new cells, each with the haploid number of chromosomes.
Fill in the blank(s) with the appropriate word(s).