Although lifestyle choices can't, in general, change our genomes, they can: (Select all correct choices)
A. change the physiological states of our
cells, which in turn affects post-translational
gene regulation.
B. increase the rate at which some genes are
transcribed.
C. decrease the rate at which some genes
are transcribed.
A,B
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In the future, it may be possible to screen for a number of different types of cancer by a simple blood test. If a blood test indicates a very early stage of lung cancer, where is the most likely place that the tumor will be growing?
A. in the parietal pleural membrane B. in the wall of a large bronchus C. in the visceral pleural membrane D. in the wall of an alveolus E. in the wall of a pulmonary vein
In warm and temperate waters, common phytoplankton are the
a. diatoms. b. radiolarians. c. coccolithophores. d. dinoflagellates. e. salps.
African sleeping sickness is caused by Trypanosoma brucei, a unicellular, flagellated protist that infects red blood cells after entering the bloodstream. Trypanosoma brucei is which of the following?
A. an alga B. a protozoan C. a slime mold D. a diatom E. a water mold
The first material to enter the Krebs cycle is
A. oxygen. B. glucose. C. acetyl-CoA. D. citric acid.