Which of the following is not considered a second messenger?
a. cAMP
b. IP3
c. Calcium
d. Ecdysone
Ans: d. Ecdysone
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Which of the following are symbiotic fungi for 80–90 percent of vascular plant species?
a. Mycoses b. Lichens c. Yeasts d. Mycorrhiza
The splicing regulatory protein (SR) identifies exons to be included in mRNA. How might SR proteins regulate alternative splicing?
A) There are alternative binding regions for these proteins within each exon. B) There are alternative SR proteins in different tissues at different stages of development. C) The SR proteins lose the ability to bind to exon splice suppressors. D) The SR proteins recruit the splicing small RNAs (U1, U2,…) or unusual ones. E) The spliceosome complex can bind only to regions with bound SR proteins.
Graves disease is an autoimmune disorder in which a person's thyroid is stimulated to produce too much thyroxine
Indicate whether the statement is true or false
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.