You are looking at the contents of a cancer drug and notice interleukin-12. What is the role of interleukin-12?
What will be an ideal response?
stimulates helper T cells
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Which of the following evidence most strongly supports the common origin of all life on Earth? All organisms _____
A) require energy B) use essentially the same genetic code C) reproduce D) show heritable variation E) evolve
A photographic representation of the chromosomes of an organism is called a(n) _______
A. allele variation B. chromosomal spreading C. chromosome picture D. karyotype
All of the following can lead to cancer except
a. mutagens. b. Bacteria. c. mutations. d. UV radiation. e. carcinogens.
In a resting neuron:a
the concentration of potassium ions is about 10 times greater inside the cell than in the extracellular fluid. b. excitatory postsynaptic potentials hyperpolarize the membrane. c. voltage-activated sodium channels are pumping sodium inside the cell against its concentration gradient. d. the membrane is more permeable to sodium than potassium ions. e. inhibitory postsynaptic potentials depolarize the membrane.