What is telomerase?
A. an enzyme that adds bases back to the tip of chromosomes every time a cell divides
B. a chemical that allows the telophase stage of mitosis to proceed
C. a chemical involved in RNA synthesis
D. an enzyme that inhibits the formation of small blood vessels that feed a tumor
E. a protein found in abundance on colon cancer cells
Answer: A
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Strong chemical mutagens may be used to treat cancer cells. Is this a good or bad idea?
A. Good-kill those cancer cells as quickly as possible to cure the patient! B. Bad-these mutagens will also affect the non-cancerous cells, possibly leading to new cancerous states! C. Good and bad-they're very good at killing cancer cells, but depending on mode of administration, they could also be dangerous to non-cancerous cells. D. Bad-the cancer cells are already mutated. We don't want to mutate them more and make them more cancerous!
Which of the following is an enzyme?
a. fibrinogen b. fibrin c. plateletase d. thrombin e. plasminogen
What is the contraction of smooth muscles that moves a bolus of food down the esophagus called?
A) emulsification B) elimination C) peristalsis D) detoxification
Who disproved the theory of spontaneous generation?
a. Hooke b. Koch c. van Leeuwenhoek d. Pasteur e. Virchow