Denitrification is the reduction of NO3– that results in N2, NO, or N2O, ALL of which are
a. toxic.
b. solids.
c. gaseous.
d. acidic.
Answer: C
Biology & Microbiology
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An mRNA sequence is 5?AUG-GGC-ACU-CAU-ACU-UAA3?, where AUG is the start codon and UAA is the stop codon. How many distinct aminoacyl-tRNA synthetases are required to translate the mRNA sequence?
A. 2 B. 3 C. 4 D. 5 E. 6
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Explain how the nervous system and hormones regulate the secretion of gastric juice. What will be an ideal response?
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Sudan IV, a dye that binds to nonpolar molecules, is used to detect the presence of macromolecules in food. Sudan IV would test positive in the presence of what macromolecule?
A. Starch B. DNA C. Fats D. Hemoglobin E. Chitin
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Changes in what frequencies are at the core of how evolution occurs?
What will be an ideal response?
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