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OlgaM077 [116]
2 years ago
6

The lac repressor functions as a tetramer and requires binding of all four sites before it releases because?

Biology
1 answer:
Alex73 [517]2 years ago
7 0

The lac repressor functions as a tetramer and requires binding of all four sites before it releases because first it assures that the lactose level is high before the operon turns on for further steps.

<h3>What is Lac Repressor ?</h3>

Lac repressor is a type of protein. It prevents the transcriptional stages of genes which involved in the Lactose utilization. Lac Operon binds to the DNA at a particular site which is known as Operator. Operator is the downstream of the promoter and the upstream of the site of transcription.

Lac repressor is made up of 2 DNA binding subunits which are composed of 2 monomers each and the monomers have particular 4 distinct regions.

To know more about the Lac Repressor please click here : brainly.com/question/7254078

#SPJ4

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The surgical removal of the membrane that lines the interior of a joint is known as a?
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The surgical removal of the membrane that lines the interior of a joint is known as Joint Synovectomy.

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When you have a painful, disabling joint issue that does not improve with non-surgical treatments including rest, drugs (NSAIDs) or corticosteroid injections, and physical therapy, your surgeon will typically advise joint synovectomy.

Hence, the surgical removal of the membrane that lines the interior of a joint is known as Joint Synovectomy.

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if a person who is blood type O marries a person who is blood type A, what are the possible blood types their children could hav
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Answer:

The possible blood types their children could have are A or 0.

Explanation:

  The I gene determines the blood type of a person. I is the dominant allele, while i is the recessive allele.

  • IA dominant over i. The person presents A type of antigens.
  • IB dominant over i. The person presents B type of antigens.
  • IA and IB are codominant. The person presents both types of antigens, A and B.
  • i is the recessive allele. The person does not present any antigen.

Cross: a person who is blood type O with a person who is blood type A

Parental)    ii      x     IA-

Gametes) i   i          IA   -

Punnet Square)   IA            -

                     i      IAi           -i

                     i      IAi           -i

The - symbol represents the possibility of either IA allele or i allele. This is, the parental with blood type A might have the genotype IAIA or IAi

F1)  2/4 = 1/2 IAi

     2/4 = 1/2    -i  (-i could be either IAi or ii, depending on the genotype of the parental with blood type A)

  • <u>Option 1</u>: ii  x  IAIA

F1)  100% IAi (The whole progeny will have blood type A)

  • <u>Option 2</u>: ii  x  IAi

F1) 50% IAi (Half of the progeny will have blood type A)

    50% ii (Halfa of the progeny will have blood type 0)  

The possible blood types their children could have are A or 0.

3 0
4 years ago
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