Choose the phrase that describes MHC class I molecules.
A. Are proteins involved in the complement system
B. Found on only some types of white blood cells
C. Expressed on all human nucleated cells
D. Are secreted from all human nucleated cells
C. Expressed on all human nucleated cells
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A temporary change in the conformation of a nitrogenous base is called ______
A. Depurination B. A tautomeric shift C. Deamination D. None of the answers are correct
Which of the following is correct with regard to adult and embryonic stem cells?
a. Only embryonic stem cells are undifferentiated. b. Both undergo mitosis and differentiation. c. Both can differentiate into any type of cell to replace old and worn-out cells. d. Adult stem cells can only develop into a limited number of cell types.
In metabolic channeling, the regulation of metabolic pathways is controlled by the ________ of metabolites and enzymes involved in the pathway.
A. location B. amount C. activity D. All of the choices are correct.
Which of the following hormones is made by the hypothalamus and released by the posterior pituitary?
A) estrogen B) growth hormone C) ADH D) insulin