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Biology
Molecular Basis of Inheritance
200 questions from 38 papers, each with its answer.
- 200 questions
- 38 papers
- 5.67% of Biology
Lac operon
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Gene regulation governing lactose operon of E. coli that involves the lac I gene product isThe repressor coded by the i gene binds the operator and prevents RNA polymerase from transcribing the operon (negative regulation).
Lactose (inducer) inactivates the repressor, allowing transcription — so the operon is inducible.
Chargaff's rule
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In sea urchin DNA, which is double stranded, 17% of the bases were shown to be cytosine. The percentages of the other three bases expected to be present in the DNA areChargaff's rule for double-stranded DNA: A = T and G = C.
C = 17%, so G = 17%.
A + T = 100 − 34 = 66%, and A = T, so A = 33% and T = 33%.
That is every question in Molecular Basis of Inheritance for this filter.
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