Nitrogen mineralization is dependent on the ratio of nitrogen to carbon in the soil. Therefore, if you want to control the levels of nitrogen mineralization, it would be helpful to control soil levels of
A. organic matter.
B. ATP.
C. phosphatase.
D. nitrogenase.
Answer: A
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Which of the following is nonpolar?
A) a positive ion B) a negative ion C) a neutral ion D) a molecule with no partial charges
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Figure 9.8
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The following questions refer to the codon table above.
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If the DNA coding strand reads ATG-CGT-GAC, the amino acid sequence of the resulting polypeptide would be __________.
A. tyrosine ? alanine ? leucine B. methionine ? arginine ? asparagine C. histidine ? glycine ? proline D. serine ? lysine ? glycine E. serine ? lysine ? isoleucine
Regulatory proteins can identify specific sequences on the DNA double helix without unwinding the helix. This is accomplished by inserting
A. DNA polymerase into the major groove of the double helix where the edges of the nitrogen bases protrude. B. RNA promoters into either the major groove or the minor groove of the double helix where the edges of the nitrogen bases protrude. C. DNA-binding motifs into the major groove of the double helix where the edges of the nitrogen bases protrude. D. RNA polymerase into the major groove of the double helix where the edges of the nitrogen bases protrude. E. DNA-binding motifs into the minor groove of the double helix where the edges of the nitrogen bases protrude.
Chitin is a reinforcing fiber in the external skeleton of arthropods
Indicate whether the statement is true or false.