In the CNO Cycle, Carbon Is Used a Catalyst for the Fusion

question 50

Multiple Choice

In the CNO cycle, carbon is used a catalyst for the fusion of hydrogen to helium. This means that:

• A) three helium nuclei fuse to form carbon
• B) carbon facilitates the reaction but is not consumed in it
• C) carbon boosts the energy from the reaction, which is why massive stars are luminous
• D) carbon breaks apart into three helium nuclei
• E) the reaction produces carbon nuclei in addition to helium

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