Question

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nitrogen is one of the important elements for life. nitrogen is present in dna and proteins. its also a component of choose an answer in plants, a pigment thats critical for photosynthesis. although nitrogen is present in the air, it cant be consumed into usable form by choose an answer.

Explanation:

Identify the photosynthetic pigment containing nitrogen

Using the Photosynthesis Site knowledge point

• Chlorophyll is the primary pigment in plants responsible for absorbing light energy during photosynthesis.
• The chemical structure of chlorophyll (such as chlorophyll a, \(C_{55}H_{72}O_5N_4Mg\)) contains a porphyrin ring coordinated to a central magnesium atom, with four nitrogen atoms in the ring structure.
• Therefore, nitrogen is a crucial component of chlorophyll.

Identify the process of converting atmospheric nitrogen

Using the Nitrogen Cycle Steps knowledge point

• Atmospheric nitrogen (\(N_2\)) is highly stable due to its triple covalent bond and cannot be directly used by plants or animals.
• Nitrogen-fixing bacteria (such as Rhizobium or Azotobacter) convert atmospheric nitrogen into usable forms like ammonia (\(NH_3\)) or ammonium (\(NH_4^+\)).
• This biological process is known as nitrogen fixation.

Answer:

Select the correct answer from each drop-down menu.

Nitrogen is one of the important elements for life. Nitrogen is present in DNA and proteins. It's also a component of <blank>chlorophyll</blank> in plants, a pigment that's critical for photosynthesis. Although nitrogen is present in the air, it can't be consumed directly by plants. Instead, it must be converted into usable form by <blank>nitrogen-fixing bacteria</blank>.