Which of the following statements regarding toxoids is FALSE?
A) They are produced against the toxin of the microorganism rather than the microorganism itself.
B) They provide lifelong immunity.
C) They stimulate antibody immune responses.
D) They have few antigenic determinants.
E) They are chemically or thermally modified.
B
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A deficiency of growth hormone during childhood results in ____
a. gigantism b. pituitary dwarfism c. osteoporosis d. osteomalacia e. acromegaly
Retroviruses have a(n) DNA polymerase called reverse transcriptase, which transcribes the RNA genome into a DNA
intermediate. ____________________ Indicate whether the statement is true or false.
The mathematical expression for the change in free energy of a system is ?G =?H - T?S. Which of the following is (are) correct?
A) ?S is the change in enthalpy, a measure of randomness. B) ?H is the change in entropy, the energy available to do work. C) ?G is the change in free energy. D) T is the temperature in degrees Celsius.
Which of the following statements about bone and its structure is NOT correct?
A. Bone tissue serves as a reservoir for calcium and phosphate ions. B. Bone tissue is not living because it contains inorganic calcium phosphate crystals. C. Bone contains an extracellular matrix of collagen fibers and inorganic calcium phosphate crystals. D. Bone marrow is a reservoir for blood stem cells E. Bone tissue is a special form of connective tissue.