Which one of the following is TRUE regarding macromolecules?
A) Cells cannot use macromolecules to signal other cells.
B) An example of a macromolecule is H2O.
C) Cells produce macromolecules by the process of hydrolysis.
D) Macromolecules are broken down by hydration synthesis.
E) Cells use certain macromolecules to store energy.
E
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In the process of isolating DNA for transcription and translation, you digest the DNA with BamHI and ligate the gene into a plasmid vector. However, even though all of the controls work, no transcription is obtained using your fragment. Working backward, you note that restriction digestion has removed approximately 250 base pairs from the 5' end of the gene. It is possible that during restriction
digestion A) the termination signal was removed. B) the RNA polymerase became inactivated. C) primase could not bind. D) the promoter was removed E) none of the above
A diet of primarily grains would likely be deficient in the____ fatty acids
a. linoleic and phospholipid
b. linoleic and linolenic c. omega-5 and omega-3 d. linolenic and omega-5 e. phospholipid and omega-3
In an average ecosystem, about how much energy is present in the organisms at a given trophic level compared to the organisms at the next higher trophic level?
A) a tenth as much B) half as much C) twice as much D) ten times as much
What are plants that flower only once before they die, normally after two seasons of growth, called?
A. Perennials B. Dicots C. Monocots D. Annuals E. Biennials