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Biology · PYQ NEET UG 2022

हिन्दी

In an E.coli strain i gene gets mutated and its product can not bind the inducer molecule. If growth medium is provided with lactose, what will be the outcome?

  1. z, y, a genes will not be translated
  2. RNA polymerase will bind the promoter region
  3. Only z gene will get transcribed
  4. z, y, a genes will be transcribed

Correct answer · Option 1

z, y, a genes will not be translated

Explanation

A mutant i gene produces a repressor that cannot bind to the inducer. Thus, the repressor remains bound to the operator, preventing transcription of z, y, a genes.

Related questions

Which of the following occurs due to the presence of autosome linked dominant trait?→The recombination frequency between the genes a & c is 5%, b & c is 15 %, b & d is 9%, a & b is 20%, c & d is 24% and a & d is 29%. What will be the sequence of these genes on a linear chromosome?→In gene therapy of Adenosine Deaminase (ADA) deficiency, the patient requires periodic infusion of genetically engineered lymphocytes because:→Statements related to human Insulin are given below. Which statement(s) is/are correct about genetically engineered Insulin? \ni. Pro-hormone insulin contain extra stretch of C-peptide ii. A-peptide and B-peptide chains of insulin were produced separately in E.coli, extracted and combined by creating disulphide bond between them. iii. Insulin used for treating Diabetes was extracted from Cattles and Pigs. iv. Pro-hormone Insulin needs to be processed for converting into a mature and functional hormone. v. Some patients develop allergic reactions to the foreign insulin. Which of the above statements is/are correct?→
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