Chapter 39, Problem 6A

You have identified a mutant Arabtdopsis plant with a very short stem. You find that an important GA-induced gene is not being transcribed because no RNA for the gene is detected. Which of the following mutations would not result in this phenotype?

a. A mutation in the GA transcription factor prevents DELLA proteins from binding.

b. The enzyme needed for GA biosynthesis is defective.

c. The GIDI protein cannot bind the SCF protein.

d. There is a mutation in the promoter region of the GA-induced gene where the GA transcription factor would otherwise bind.