Phytochemicals in low quantities in a person’s diet
may lead to
a. high blood pressure.
b. increased incidence of athletes foot.
c. macular degeneration.
d. halitosis.
e. none of these.
Answer: c
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How do steroid hormones differ from those derived from amino acids?
a. steroid hormones are not derived from organic molecules b. steroid hormones do not bind to plasma membrane receptors c. steroid hormones use a second messenger system
d. steroid hormones do not travel in the blood e. steroid hormones do not require receptors to function
Once uterine contractions have begun, the female body releases several hormones that act in a positive feedback loop. The purpose of this feedback loop is ________.
A. to promote the development of a new follicle B. to ensure continued contractions until labor is complete C. inhibit the release of prostaglandins D. decrease the number of oxytocin receptors in the uterus
Refer to Figure 31-1. The type of larva pictured at #4 is a:
A. planula.
B. miracidium.
C. cercaria.
D. polyp.
E. medusa
With respect to RNA processing, which of the following is false?
A) RNA processing leads to the production of alternative gene products. B) Some introns are removed by spliceosomes. C) Some introns are self-splicing. D) Prokaryotic mRNAs are polyadenylated at the 3' end. E) Chemical modification occurs in tRNA transcripts.