Immunoglobulins and TCRs associate with adaptor molecules that have

A) a C domain.
B) immune-based tyrosine-activation motifs (ITAMs).
C) pathogen recognition receptors.
D) toll-like receptors.


Answer: B

Biology & Microbiology

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Indicate whether the statement is true or false.

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Four of the five answers listed below are parts of the same sense organ. Select the exception

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Trace the path of an inhaled air molecule in a human being.

A. nasal cavity-pharynx-larynx-glottis-trachea-bronchi-bronchioles-alveoli B. nasal cavity-pharynx-glottis-trachea-larynx-bronchi-bronchioles-alveoli C. nasal cavity-pharynx-glottis-larynx-trachea-bronchi-bronchioles-alveoli D. nasal cavity-pharynx-glottis-larynx-trachea-bronchioles-bronchi-alveoli E. nasal cavity-glottis-larynx-trachea-pharynx-bronchi-bronchioles-alveoli

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The lac operon of E. coli is ________ when the repressor is bound to ________

A) active; lactose B) inactive; lactose C) active; tryptophan D) inactive; tryptophan

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