Human blood groups are determined by antigens on the surface of red blood cells

Indicate whether the statement is true or false


TRUE

Biology & Microbiology

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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

Biology & Microbiology

In woody plants, phloem is found in the

a. annual rings. b. inner bark region. c. outer bark region. d. parenchyma.

Biology & Microbiology

The contractile vacuole of the paramecium is possibly an evolutionary precursor of the kidney.

a. true b. false

Biology & Microbiology

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

Biology & Microbiology