Inactive forms of digestive enzymes are called ________.
A. zymogens
B. coenzymes
C. cofactors
D. Both cofactors and zymogens are correct.
Answer: A
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Poison ivy contains a toxin that acts as a hapten by
A. raising the body's sensitivity to a wide variety of chemicals such as penicillin. B. cutting plasma protein antibodies in half. C. preventing effective immune responses by blocking release of bradykinin. D. combining with a body protein and then triggering an immune response.
Jawless fish lack immunoglobulins and use __________________ to recognize non-self macromolecules
A) Variable antigen receptors B) Variable lymphocyte receptors C) C region receptors D) Recombination signal receptors Fill in the blank with the correct answer.
Select the correct statement about the function of antibodies.
A) Antibodies may directly destroy "invaders." B) Neutralization is the process by which antibodies cause invading cells to clump together. C) Complement fixation is the main mechanism by which antibodies provide protection. D) The most potent agglutinating agent is IgG.
What is the most common form of skin cancer?
A. Melanoma B. Erythema C. Squamous cell carcinoma D. Multiple myeloma E. Basal cell carcinoma