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Mumz [18]
3 years ago
9

Which one of the following accurately describes the Lac operon?

Biology
1 answer:
Sati [7]3 years ago
5 0
Option D is the one most accurately describing Lac Operon. The lac operon is known as an inducible system. Since Lac operon is an inducible system, it will only activate in the presence of a key molecule . The key molecule, lactose, induces the Lac operon to be activated. Once lactose binds to the repressor, it causes it to be removed. RNA polymerase is then able to access the genes in the Lac operon and transcribe them in RNA and eventually proteins.
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If a mutation is removed from a population due to either genetic drift or natural selection, it is said to be:
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Negative nitrogen balance

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6 0
3 years ago
Human ABO blood type is controlled by the I locus and has three possible alleles. The alleles which code for type A blood (IA) a
Oxana [17]

Answer:

1/8 (12.5 %)

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Cross: IAi X  IAIB

F1: 1/4 IAIA 1/4 IAIB 1/4 IAi 1/4 IBi

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- IBi >> type B blood

- IAIB >> type AB blood

Phenotypic frequency type A blood: 1/2  (i.e., 1/4 IAIA +  1/4 IAi) >>

Probability to have 3 offspring with type A blood: 1/2 x 1/2 x 1/2 = 1/8

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Licemer1 [7]

Answer:

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3 years ago
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