Which of the following statements best explains the atomic bomb and the benefit of nuclear physics to cancer therapy?
A. Science and technology are value-neutral.
B. Science and technology are good for mankind.
C. Science and technology are not risk free.
D. Science and technology are wrong.
E. Science and technology always provide value to people.
Answer: C
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In signal transduction, phosphatases _____
A) move the phosphate group of the transduction pathway to the next molecule of a series B) prevent a protein kinase from being reused when there is another extracellular signal C) amplify the transduction signal so it affects multiple transducers D) amplify the second messengers such as cAMP E) inactivate protein kinases and turn off the signal transduction
A muscle that has the opposite effect to that of another muscle at the same joint is called a(n)
a. flexor. b. agonist. c. depressor. d. antagonist. e. extensor.
What type of cells do not undergo mitosis?
A. All cells of the body except gametes (i.e., only somatic cells) B. Gametes C. Both somatic cells of the body and gametes D. Neither somatic cells of the body nor gametes
The first cell that was seen under a microscope was a
a. blood cell. b. skin cell. c. cork cell. d. sperm cell. e. root tip cell.