A doctor discovers that her patient can produce antibodies against some bacterial pathogens, but he is unable to protect himself against viral infections. The doctor suspects a disorder in her patient's
A. B cells.
B. plasma cells.
C. cytotoxic T cells.
D. suppressor T cells.
E. macrophages.
C. cytotoxic T cells.
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The process of adding hydrogen to N2, creating NH3 and eventually NH4+, and which requires a substantial input of ATP, is called ____.
a. nitrification b. ammonification c. nitrogen cycling d. nitrogen fixation e. nitrogen assimilation
The detection of an enzyme called ________ in a cell is an indicator that the cell may be cancerous because it is rarely present in normal cells
Fill in the blank(s) with correct word
In a photosystem, clusters of chlorophyll a, chlorophyll b, and carotenoid pigments function most like
A) an antenna. B) a propeller on a motorboat. C) a windmill. D) a spring.
If a psychotic person's level of consciousness is fluctuating, you should:
A) administer 25 g of dextrose. B) immediately assess blood pressure. C) consider administering haloperidol. D) suspect an organic brain syndrome.