List the main steps involved in converting pre-mRNA to mRNA. What will be an ideal response?
1) addition of a 5’cap, 2) addition of a poly-A tail, 3) removal of introns, and 4) splicing of exons.
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Kidneys
a. filter water. b. filter mineral ions. c. filter nitrogen rich wastes. d. produce urine. e. perform all of these functions
According to the endosymbiosis hypothesis ________.
A. the mitochondrion evolved from the same endosymbiont as the hydrogenosome B. the first endosymbiont was a fermentative organism C. the first endosymbiotic event involved an anaerobic bacterium D. All of the choices are correct.
In humans, ________ divide by meiosis to produce eggs and sperm.
A. somatic cells B. gametes C. triploid D. zygotes E. germ-line cells
The Food Guide Pyramid suggests that most Americans should increase their intake of ____ and reduce their intake of ___.
A. vegetables; dairy products B. water; cereals C. vegetables; fats D. meats; fruits