Monoclonal antibodies obtained from a hybridoma provide
A.
a large amount of an antibody that is specific for a particular epitope.
B.
a single antibody that recognizes many epitopes.
C.
many epitopes that recognize a specific antibody.
D. a large number of B cells.
A
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The function of leghemoglobin in root nodules is to
A) bind oxygen. B) chelate iron. C) produce iron. D) produce nitrogen.
Most pathogens that gain access through the uninjured skin
A) Just infect the blood below the skin. B) Penetrate a cut or puncture. C) Must be injected. D) Enter through hair follicles and sweat ducts on the skin. E) Must be carried by a parasite to allow them to penetrate.
A mutation in mice leads to overgrowth of the Sertoli cells, so they span across the diameter of the seminiferous tubules. What phenotype would you expect to see?
A. infertility due to lack of mature sperm entering the epididymis B. infertility due to lack of mature oocytes C. overproduction of sperm, so they clog the bulbourethral gland D. overproduction of testosterone
The following steps are required for making cheese. What is the second step, which helps to provide the characteristic flavors and aromas of the cheese?
A) enzymatic coagulation of milk B) fermentation of curd C) inoculation with lactic acid bacteria D) inoculation with Penicillium E) separation of curds and whey