Human blood groups are determined by antigens on the surface of red blood cells
Indicate whether the statement is true or false
TRUE
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Many receptor tyrosine kinase pathways have MAPK as a downstream signaling component. MAPK can phosphorylate target proteins. What type of signaling molecule is MAPK?
A. Scaffold B. Adapter protein C. Second messenger D. Enzyme
In woody plants, phloem is found in the
a. annual rings. b. inner bark region. c. outer bark region. d. parenchyma.
The contractile vacuole of the paramecium is possibly an evolutionary precursor of the kidney.
a. true b. false
What type of regulatory transcription factor binds DNA and increases the transcription of a gene?
A. an activator exerting negative control B. an activator exerting positive control C. a repressor exerting negative control D. a combination of both a repressor and activator exerting negative control E. a repressor exerting positive control