Antibodies are ________
A) composed of four fatty acid chains
B) a type of lymphocyte
C) proteins with short carbohydrates attached
D) proteins consisting of four polypeptide chains
D
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Chloroplasts are composed of membranous sacs called ________ that carry chlorophyll. Surrounding these sacs is a ground substance called ________.
A. grana; stroma B. cristae; stroma C. thylakoid; matrix D. cristae; matrix E. thylakoids; stroma
Which of the following is a special adaptation for brachiation in primates?
a. One offspring per pregnancy b. A rotating shoulder joint c. A complex placenta d. Large eye sockets
The cell walls of fungi are composed of cellulose
____________________ Indicate whether the statement is true or false.
Graves' disease is an example of which of the following type II hypersensitivity cytotoxic reactions?
A) Antibodies directly recruit leukocytes to lyse tagged extracellular cells B) IgM binds to nonsoluble antigens on the surface of a cell causing complement cascade activation to lyse cells. C) Antibodies interact with a cell-surface receptor on self-cells causing the inactivation of the receptor. D) IgG binds to nonsoluble antigens on the surface of a cell causing complement proteins to opsonize the target, thereby tagging it for phagocytosis. E) Antibodies interact with a cell-surface receptor on self-cells causing the overactivation of the receptor.