Antigen binding sites on one antibody:
a. are the same as on all other antibodies
b. will bind to several different antigens
c. are unique and specific to one antigen
d. consist of light chain variable regions only
e. are the same as all membrane bound receptors
c
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Urea is _____
A) insoluble in water B) more toxic to human cells than ammonia C) the primary nitrogenous waste product of humans D) the primary nitrogenous waste product of most birds E) the primary nitrogenous waste product of most aquatic invertebrates
If E. coli bacteria are grown only in the presence of lactose, then the repressor will
A. not bind the operator, allowing transcription of the lac operon genes. B. bind the operator, preventing transcription of the lac operon genes. C. bind the operator, allowing transcription of the lac operon genes. D. not bind the operator, preventing transcription of the lac operon genes. E. bind the operator, preventing translation of the lac operon genes.
Which of the following correctly explains what a heart attack is?
A. Veins that supply the heart with oxygen become blocked. B. Arteries that supply the heart with oxygen become blocked. C. Veins that supply the brain with oxygen become blocked. D. Arteries that supply the brain with oxygen become blocked.
Members of the genus Actinomyces are either facultative or strict anaerobes that require ________ for optimal growth.
Fill in the blank(s) with the appropriate word(s).