What removes nitrogen from the atmosphere?
a. denitrification
b. nitrification
c. mineralization
d. nitrogen fixation
e. assimilation
Ans: d. nitrogen fixation
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Bioluminescence in Vibrio harveyi is due to an alternate sigma factor that prevents ________ from binding to Lux mRNA, thus allowing translation of bioluminescent genes.
A. antisense B. autoinducing proteins C. phosphate D. ribosomes
In the figure above, what absorbs photons of both blue and red light?
a. 5 with 3 b. 5 with 4 c. 5, regardless of the R group d. 6 e. 7
If a mutation causes the "T" base in the base sequence 5'-AGTCCG-3' to be read as a "G" base, the complementary strand of the mutated strand will read
A. 3'-UCCGGC-5'. B. 3'-TCCGGC-5'. C. 3'-AGGCCG-5'. D. 3'-CTTAAT-5'. E. 3'-AGTCCG-5'.
An advantage of chorionic villus sampling (compared with amniocentesis) is that:a
chorionic villus sampling detects a much wider range of genetic defects than does amniocentesis. b. chorionic villus sampling is much less expensive than is amniocentesis. c. chorionic villus sampling is much less invasive than amniocentesis. d. chorionic villus sampling is much easier to perform than amniocentesis. e. chorionic villus sampling can be performed much earlier than can amniocentesis.