How Do Some Cyanobacteria Fix Nitrogen While Growing Aerobically

question 68

Multiple Choice

How do some cyanobacteria fix nitrogen while growing aerobically?

• A) they don't because nitrogenase is destroyed by oxygen
• B) by using special cells called heterocysts that protect the enzyme
• C) by using cysts that protect the enzyme
• D) they just do it, no special structures or mechanisms
• E) they live symbiotically with other organisms that protect the enzyme

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