You are asked to participate in a clinical trial for a new drug that can activate telomerase. Which of the following is a likely risk of such a drug?
A. decreased capacity for tissue repair
B. decreased telomere length
C. increased vulnerability to cancer
D. premature aging
Answer: C
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The integumentary system is responsible for all but which of the following?
a. protection against bacterial attack b. protection against abrasion c. synthesis of certain vitamins d. blood cell formation e. control of temperature and prevention of drying out
Gene flow through migration ________
A) has no effect on allele frequencies of populations B) can go only in one direction C) may have the largest impact on small populations, such as those on islands D) maintains the Hardy-Weinberg equilibrium
Unlike other microbes, archaea are able to thrive:
a. in all the same places that bacteria are found. b. in lakes and rivers (i.e., fresh water). c. in well-aerated soils. d. in very extreme environments. e. in the human body.
Which of the following is considered a model for enzyme action?
A. Lock and Key model B. Enzyme interaction model C. Transformation model D. Transcription model