Allergies that trigger whole-body responses can trigger the deadly condition ____
a. hypertension
b. anaphylactic shock
c. stroke
d. myocardial infarction
e. uremic shock
ANSWER: b
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To test for the presence of starch, iodine can be used. A positive reaction results in a black color. A dialysis bag filled with starch solution and secured on both ends is placed in iodine solution. After 30 minutes the dialysis bag appears black. Based on this information, what most accurately describes what happened?
A. Due to its size and polarity, starch was able to exit the dialysis bag and interact with the iodine solution. B. Due to its size and polarity, iodine was able to enter the dialysis bag and interact with starch. C. Over time, both iodine and starch are equally distributed throughout the two solutions. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you know about dialysis? What other information is related to the question? Choose Answer · Given what you now know, what information and/or problem solving approach 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?
All of the following involve molecular biology techniques except
A. ligating DNA fragments together. B. using restriction enzymes to cut specific sequences of DNA. C. using a DNA polymerase to copy DNA via PCR. D. creation of Okazaki fragments.
Which molecule is released in tissues and diffuses to the target cell?
a. thyroid hormone b. insulin c. adrenalin d. prostaglandins e. growth hormone
Which of the following does not contribute to shifts in our normal microbiota?
A) our general environment B) hormonal changes C) diet D) age E) proper hand-washing technique