During exposure to elevated glucose, a yeast cell will increase its uptake of glucose. Describe the mechanism by which the yeast sense the extracellular glucose.
A. By the increase in energy outside the cell when the glucose is metabolized.
B. By glucose diffusing into the nucleus and binding to transcription factors.
C. By the increase in energy inside the cell when the glucose is metabolized.
D. By glucose uptake through glucose transporters.
E. By glucose binding to glucose receptors.
E. By glucose binding to glucose receptors.
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Most conifers are __________, meaning that they retain their leaves throughout the year
A. deciduous B. evergreen C. ephemeral D. dioecious E. monecious
Fungi, together with bacteria, are the principal ________ in the biosphere.
Fill in the blank(s) with the appropriate word(s).
The most commonly accepted tree of life suggests that, after the origin of life, which of the following events occurred?
a. Bacteria arose from the first self-replicating, metabolizing cells. b. There was a split between the bacteria and a line that gave rise to the prokaryotes and eukarya. c. The fusion of a bacterium and a virus gave rise to the eukarya. d. The fusion of a bacterium and an archaeon split from the protist line. e. None of the above
A Coulter counter is used to obtain pure cultures.
Answer the following statement true (T) or false (F)