You are a chemist designing a test to allow women to know when they have ovulated. Choose the best hormone for your test, which will indicate that ovulation has occurred when detected at high levels.
A. progesterone
B. LH
C. chorionic gonadotropin
D. estradiol
Answer: B
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Many health food stores carry enzyme preparations intended for oral ingestion (by mouth) to supplement existing enzymes in various organs like the liver, heart, and muscle. Use your knowledge of the digestion process to explain why these preparations are unlikely to be effective as advertised.
What will be an ideal response?
Which of the following statements is TRUE of membrane phospholipids?
A. The hydrophilic head groups face the interior portion of the membrane. B. The hydrophobic tail groups face the exterior portion of the membrane. C. They spontaneously flip-flop from one side of the membrane to the other. D. They freely move laterally within the membrane. E. They rarely flip-flop across or move laterally within the membrane.
Why is high blood pressure damaging to the kidneys? What will be an ideal response?
The temperature of a city is often warmer than the temperature in its surrounding suburbs. This is the result of an urban heat island effect. Why might this effect occur?
A) The pavement and buildings absorb heat. B) There are more parks in the city. C) Fewer people drive in the suburbs. D) Fewer buildings use air conditioning in the suburbs.