Which of the following proteins isnot associated with the C-terminal domain of RNA polymerase II?
A. cap binding complex
B. RNA-editing terminal uridylyl-transferase
C. guanylyltransferase
D. polyadenylation factors
B
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In the pulmonary arteries, the partial pressure of oxygen is approximately ________, and hemoglobin is approximately ________ saturated with oxygen.
A) 100 mm Hg : 98% B) 40 mm Hg : 75% C) 80 mm Hg : 90% D) 25 mm Hg : 50% E) 60 mm Hg : 80%
Most insects and invertebrates are said to be iteroparous
____________________ Indicate whether the statement is true or false.
What would be an easy way to determine if a skull is a mammal's skull?
A. Look for the remains of the tympanum. B. Examine the teeth. C. Measure the brain case volume. D. Look for air sacs in the skull.
A key feature of enzymes is that they ________ .
a. interact generally within cells b. are changed by reactions c. force reactions to occur d. are not used up in reactions e. are carbohydrates