In positive selection of T-lymphocytes, those cells that
A. can bind MHC survive.
B. bind to MHC class II are eliminated.
C. bind self antigens are eliminated.
D. bind to self antigens survive.
Answer: A
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On which side of the pH scale do household cleaners such as bleach and ammonia belong?
A. Acidic B. Neutral C. Concentrated D. Basic
Potassium, sodium, and chlorine are trace elements.
Answer the following statement true (T) or false (F)
Which of the following is not a function of the Golgi complex?
A. Synthesis of carbohydrates B. Addition of carbohydrates to certain proteins C. Packaging of proteins for export from the cell D. Synthesis of lysosomes E. DNA replication
The end of the aorta occurs when the vessel bifurcates into the
A. brachiocephalic artery. B. subclavian arteries. C. common carotid arteries. D. common iliac arteries.