Hox genes, one class of ____ genes, contain a conserved ____ region to which transcription factors containing a
corresponding ____ bind.
a. maternal effect; homeodomain; homeobox
b. segmentation; homeobox; homeodomain
c. segmentation; homeodomain; homeobox
d. homeobox; homeobox; homeodomain
e. homeobox; homeodomain; homeobox
ANSWER: d
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The promoter is bound by which enzyme?
A) DNA polymerase B) RNA polymerase C) Reverse transcriptase D) DNase E) RNase
patient with melanoma receives three types of therapy: surgery, radiation, and interferon. Which of these represents something the immune system uses against cancer as well?
A. Radiation -- a class of lymphocytes uses powerful electromagnetic radiation to attack "altered self" cells. B. Interferon -- TH cells and NK cells secrete interferon in response to tumor cells. C. Interferon -- NK cells insert interferon into the membranes of tumor cells, creating large pores that burst the cells. D. Interferon -- In complexes bound with MHC proteins, the interferons indicate the presence of altered tissue to B cells. Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about the actions of the immune system? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Only dendritic cells produce interleukins
Indicate whether the statement is true or false
Which one of the following produces the most potent exotoxin?
A) Bordetella pertussis B) Corynebacterium diphtheriae C) Mycobacterium tuberculosis D) Streptococcus pyogenes E) Streptococcus pneumoniae