How much of a 1:20 solution of NaCl is needed to make 1 L of 1:50 solution of NaCl?
a. 2000 mL
b. 1000 mL
c. 500 mL
d. 400 mL
.D
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Different T-cell receptors can respond to different antigens because of different
A. complement binding sites in the receptors. B. variable regions in the structure of the receptors. C. antigenic determinants. D. epitopes in the receptor's structure. E. selection processes.
The clavicle articulates with the scapula
A) distally with the coracoid process. B) distally with the glenoid cavity. C) distally with the acromion. D) distally with the manubrium. E) proximally with the coracoid cavity.
The figure illustrates a detailed drawing of the neuromuscular junction. What does "A" represent?
A. Synaptic cleft B. Sarcolemma C. Presynaptic terminal D. Synaptic vesicles E. Postsynaptic membrane
Acetyl CoA
A. might be used in ketogenesis. B. is converted to pyruvate. C. is needed to start oxidative deamination. D. can enter the electron transport system directly. E. is a by product of glycolysis.