The major function of siRNAs is to
A) increase the rate of protein translation.
B) turn off gene expression.
C) prevent chromatin condensation.
D) support DNA replication.
Answer: B
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What evolutionary force is definitely not responsible for generating the obvious differences between races?
A. genetic drift B. natural selection C. sexual selection D. gene flow
A biological catalyst is also referred to as which of the following?
a. protein b. lipid c. enzyme d. carbohydrate
Which of the following is a common human use of bacteria?
A. producing sugar B. decomposition in sewage treatment plants C. producing antibiotics D. All of the above are correct.
Which of the following statements BEST explains the observation that there are more autism cases now than in the past?
a. There are more parents who neglect their children, which is a cause of autism, now than in the past. b. Autism has been selected for in recent generations by natural selection. c. The vaccine for measles, mumps, and rubella has been established as a significant cause of autism. d. Doctors are more aware of the condition and have better techniques for diagnosing and reporting it. e. All of the above are equally good explanations for the observation that there are more autism cases now than in the past.