In order for a eukaryotic gene to be engineered into a bacterial colony to be expressed, what must be included in addition to the coding exons of the gene?
A. eukaryotic tRNAs
B. a bacterial promoter sequence
C. the introns
D. eukaryotic ribosomal subunits
E. eukaryotic polymerases
Ans: B. a bacterial promoter sequence
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Research in Colorado’s San Juan Mountains has illustrated that in comparison to stands of lodgepole pine and Englemann spruce, stands of trembling aspen are not likely to ____.
a. grow in warmer soil b. grow in soil with higher nitrate concentrations c. be associated with different arrays of soil-dwelling organisms d. allow more sunlight to reach the soil surface e. retain their leaves through the winter
Four of the five answers listed below are components of the mixture used in Miller and Urey's experiment. Select the exception
a. ammonia b. methane c. water d. hydrogen e. oxygen
Which of the following does not take place during the first of the two phases of photosynthesis?
a. Light energy is absorbed by electrons in the chlorophyll. b. Water is split. c. ATP and electron carriers are formed. d. Carbon dioxide is fixed. e. Oxygen is released.
In higher animals, including humans, meiosis results in the production of
a. egg cells (ova). b. gametes. c. sperm cells. d. all of the above.