Which of the following is NOT a phenotypic change typical of transforming cells compared to normal?
a) Change from a differentiated shape to a more stem-like generic shape
b) Reduced dependence on external growth signals
c) Increased cell-to-cell contact inhibition
d) Increased mitotic activity
Answer: c) Increased cell-to-cell contact inhibition
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What helical forms are adopted by double-stranded RNA?
A. There is evidence for B-form RNA in viruses. B. There is no evidence that A-form RNA occurs in cells. C. The A form is the only form found for double-stranded RNA in cells and in viruses. D. There is evidence that Z-form RNA occurs in cells under certain conditions. E. The A form occurs only in the laboratory.
If you are rolling a standard six-sided die with each side numbered from 1 to 6, what is the probability that you will roll a 2 or a 4?
a. 1/6 b. 1/2 c. 1/3 d. 1/4
Which of the below is not of the processes of toxicokinetics?
a. absorption b. biotransformation c. exclusion d. excretion
Sometime after a human baby is born, the production of the fetal hemoglobin protein ceases and the production of the adult hemoglobin protein begins. Imagine that a baby is born and this switch from fetal to adult hemoglobin does not occur. In which part
of the world would this baby be well adapted to living? A) high-altitude cities B) open grasslands C) sea level at the beach D) a tropical rain forest