If 15 percent of the nitrogenous bases in a sample of DNA from a particular organism is thymine, what percentage should be cytosine?
A) 30 percent B) 35 percent C) 70 percent D) 15 percent E) 40 percent
B
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The formation of carbohydrate (CO2 fixation) in the dark reaction of photosynthesis, takes place in the
A. nucleus. B. stroma. C. thylakoid membrane. D. cytoplasm.
The largest known fish is:
a. the blue whale. b. the whale shark. c. the megamouth shark. d. the great white shark. e. the humpback whale.
You have just moved from Norfolk, Virginia (sea level), to Taos, New Mexico (high in the
mountains), and you find yourself out of breath climbing a small hill. Three months later, climbing the same hill, you have no difficulty. In the interim you have not altered your level of activity or diet. Which hormone has been at work? a. angiotensin b. erythropoietin c. aldosterone d. estrogen e. anti-diuretic hormone
Optical tweezers can be used to ________.
A. study nucleic acids recovered from individual cells B. help dissect individual microorganisms C. remove structures from the surface of cells D. All of the choices are correct.