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Molecular Basis of Inheritance — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYMolecular Basis of Inheritance2 Marks
Question
  1. Name the molecule 'X' synthesised by 'i' gene. How does this molecule get inactivated?
  2. Which one of the structural genes codes for B-galactosidase?
  3. When will the transcription of this gene stop?
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Answer

  1. The molecule 'X' is a repressor protein; when the inducer lactose combines with it, it is inactivated.
  2. Z gene.
  3. The transcription stops when.
  1. The substrate lactose is not available.
  2. The energy source, glucose is available to the cells.

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