The figure above illustrates antibody titers produced during a primary and secondary immune response. All of the following statements about the primary and secondary immune response are correct EXCEPT which one?
A) Antibody is produced at a much higher rate during the secondary immune response.
B) The antibody level produced in the secondary response is three times greater than that produced during the primary immune response.
C) There is a lag time between antigen exposure and antibody production in the primary immune response that is not seen in the secondary immune response.
D) The difference between the two responses is due to the presence of memory cells during the secondary response.
E) Antibody levels stay elevated for a longer time following a secondary response.
B
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Many animals have a mutually-beneficial, symbiotic relationship with bacteria that reside in their guts. To study the effects of these relationships in more detail, research organisms such as fish and mice have been raised under germ-free conditions. What important process do you predict is compromised in germ-free mice?
A. synthesis of essential amino acids B. vitamin C synthesis C. leptin synthesis D. vitamin D synthesis E. vitamin K synthesis Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you know about essential nutrients can be made by bacteria in the intestines? What other information is related to the question? Choose Answer · Given what you now know, what information is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Genetic engineering has produced which of the following animals?
a. wild caught salmon b. pigs c. Dolly the sheep d. cows resistant to mad cow disease e. grass-fed beef
Hereditary material in organisms is
a. DNA b. ATP c. RNA d. chromosomes
the breakdown of glucose to two pyruvates. Series of anaerobic enzymatic reactions that occur in the cytoplasm.
What will be an ideal response?