The portion of the immunoglobulin molecule that contains the antigen binding site can be described as all of the following except the
A. Fab fragment
B. Fc fragment
C. variable region
D. light chain
E. portion responsible for cross-linking
Answer: B. Fc fragment
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Plant cells called ____ form flexible support strands such as the "strings" in celery
a. sclerenchyma b. tracheids c. collenchyma d. parenchyma e. vessel members
Which part of the brain is best associated with thinking and problem solving?
a. cerebral cortex b. spinal cord c. hypothalamus d. midbrain e. cerebellum
Which of these events occurs first?
A) gastrulation B) cleavage C) implantation D) formation of the placenta
The link between macrophages and neutrophils is that both cells
A. Have large granules in the cytoplasm B. Are phagocytes C. Have a life span of about 10 years D. Lack a nucleus E. recognize tumor and virus infected cells and kill them