The carotenoid pigments of some phototrophs interact with ________ to reduce its toxicity.
A. singlet oxygen (1O2)
B. hydroxyl radical (HO-)
C. peroxide anion (O22-)
D. superoxide radical (O2-)
E. molecular oxygen (O2)
Answer: A
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Blood from the systemic circuit is first received by the heart in the
a. coronary vein. b. left atrium. c. right ventricle. d. right atrium. e. left ventricle.
The brain stores large amounts of information for hours, days, or years. This type of memory is called ________
Fill in the blank(s) with correct word
Which of these viral cytopathic effects is most likely to be associated with the development of cancer?
A) inclusion bodies B) cell death C) loss of contact inhibition D) stimulation of interferon E_ production E) cell fusion
A type of transport of a solute across a membrane, up its concentration gradient, using protein carriers driven by the expenditure of chemical energy is known as
A. osmosis. B. facilitated transport. C. diffusion. D. exocytosis. E. active transport.