These cells promote antibody production by the B cells.
A. Memory T cells
B. Cytotoxic T cells
C. Regulatory T cells
D. Helper T cells
Answer: D. Helper T cells
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A transverse plane will cut a body or organ into
a) anterior and posterior portions. b) left and right portions. c) superior and inferior portions. d) portions separated at an angle to its longitudinal axis. e) unequal left and right portions.
Which enzyme class transfers electrons from one substance to another?
A. Transferase B. Oxidoreductase C. Electin D. Isomerase E. Ligase
Cerebrospinal fluid circulates from the third ventricle to the fourth through the
A) cerebral aqueduct. B) foramen of Magendie. C) foramina of Monro. D) interventricular foramina.
If a DNA molecule were known to be 22% thymine (T), what would be the percentage of guanine (G) present?
A. 11% B. 22% C. 78% D. 28% E. 8%