An activator is to an enhancer as a(n) _____ is to a silencer.
A. transcription factor
B. inducer
C. repressor
D. mediator
E. RNA polymerase II
C. repressor
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Which of the following statements about cancer is FALSE?
A. It is characterized by uncontrolled cell division. B. Over 1 million Americans are diagnosed with cancer each year. C. Most cancers involve genetic changes that are passed from parent to offspring. D. At least 80% of all human cancers are related to exposure to carcinogens. E. It is caused by an accumulation of mutations.
Oils from rapeseed and hemp are used in four of the following. Which one is the exception?
a. detergents b. dye c. skin care products d. fuel e. industrial lubricants
Why are plants like the venus fly trap and pitcher plant carnivorous?
a. The need additional carbon than is present in the soil b. They need additional protein than what is present in the soil c. They need additional mineral nutrients than what is present in the soil d. They need additional energy than what is present in the soil
You are a professor supervising first year medical students. One student is examining the adrenal gland of his cadaver. "Wow!" he exclaims, "This person must have had an endocrine problem. Their adrenal gland lacks any kind of duct connecting it to the bloodstream. The hormones could only have oozed out." How do you respond?
A. "That makes their adrenal gland similar to an exocrine organ." B. "Look carefully and you will see the nerves that transport the hormones into the bloodstream." C. "That's normal. The hormones ooze out and diffuse into nearby capillaries, which is why endocrine glands are sometimes called 'ductless glands'." D. "Do you see signs of adrenal insufficiency, such as low fat stores or muscle degeneration?"