The growth hormone is called
a. prolactin.
b. adrenalin.
c. thyroxine.
d. ACTH.
e. somatotropin.
E
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If a pigment absorbed violet, yellow, orange, red, and green light, what color would it appear to be?
a. white b. brown c. black d. blue e. gray
Which of the following is (are) true concerning
antigen-presenting cells? a. They may be macrophages. b. They may be B cells. c. They may be dendritic cells. d. They have antigen bound to their MHC markers. e. All of these are true.
What is a regulatory protein for a gene? It binds to specific DNA sequences with high affinity and plays a predominant role in determining if a genome segment is transcribed or not.
a) the terminator b) the promotor c) the structural genes d) the repressor e) the operator
You observe a microbiologist examining two plates and notice the pattern of colonies are nearly identical with the exception of a few colonies that are absent on one of them. The plates likely were produced by
A) positive selection culturing. B) replica plating. C) pour plating. D) streak plating. E) the Ames test.