Practice question
Question
Which enzyme converts GA20 into GA1?
Explanation
Go with C — GA3-oxidase. Under Gibberellins, this is the standard explanation you’d use in class: it names the real driver or definition, while the rest are nearby but wrong. Not these: A) GA20-oxidase; B) GA2-oxidase; D) GA13-oxidase. When two options sound similar, choose the one that matches the textbook definition most tightly.