Nitrogen-Fixing Bacteria in the Roots of Soybeans Help Provide a Source

question 132

Multiple Choice

Nitrogen-fixing bacteria in the roots of soybeans help provide a source of nitrogen to the plants,and in exchange,the bacteria obtain food from the plants.Which reaction can these bacteria catalyze?

• A)nitrogen gas (N₂)to nitrate (NO₃)
• B)ammonium (NH₄⁺)to nitrate (NO₃)
• C)nitrogen gas (N₂)to ammonium (NH₄⁺)
• D)nitrate (NO₃)to ammonium (NH₄⁺)
• E)nitrate (NO₃)to nitrogen gas (N₂)

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