Transcriptional control-proteins increase the rate of transcription by binding to
A. mRNA sequences within the DNA.
B. tRNA sequences within the DNA.
C. operator sequences within the DNA.
D. promoter sequences within the DNA.
E. enhancer sequences within the DNA.
E. enhancer sequences within the DNA.
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The presence of ____ in rock help geologists locate deposits of oil
a. red algae b. flagellated protozoans c. amoebas d. rhizarian shell fossils e. brown algae
The mixing of atmospheric air within the dead space of the conducting zone of the lung upon inspiration results in a partial pressure of
A) oxygen in the alveoli that is higher than atmospheric. B) nitrogen in the alveoli that is higher than atmospheric. C) oxygen in the alveoli that is lower than atmospheric. D) carbon dioxide in the alveoli that is lower than atmospheric. E) water vapor in the alveoli that is lower than atmospheric.
Which statement about mitochondria is true?
A) Mitochondria are found in both eukaryotes and prokaryotes. B) There tend to be more mitochondria in fat cells than in liver cells. C) Most plant cells contain mitochondria. D) Mitochondria may have originated evolutionarily as photosynthetic bacteria. E) Red blood cells contain the most mitochondria of any cells in the human body.
All of the following disrupt the cytoplasmic membrane except ____
A. Detergents B. Quaternary ammonium compounds C. High concentration phenols D. Iodine