Gibberellins (GA) are hormones required for stem elongation and thereby the overall height of the plant. Bioactive GA binds to its receptor and subsequently activates the gene expression leading to stem growth. In the absence of GA, the SLR1 repressor blocks transcription of GA-inducible genes. GA binds to a receptor GID1 in the nucleus and the GA-GID1 complex then binds to the SLR1 repressor. Formation of GA-GID1-SLR1 complex leads to degradation of SLR1. This event unlocks the transcriptional activator allowing it to transcribe the GA-inducible genes. Based on this information, the correct statement(s) is(are) ___.

• Correct answer
  A

  SLR1 RNAi plants are tall in the presence of bioactive GA 2.
• B

  Mutation of transcriptional activator binding site on SLR1 will result in short plants even in the presence of bioactive GA
• C

  In absence of bioactive GA, SLR1 remains bound to the transcriptional activator resulting in growth of plants
• Correct answer
  D

  Plants mutant for GID1 gene result in dwarf plants even in presence of bioactive GA

Hence, the correct answer is options: 'A', 'D'.