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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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Answer: All their offsprings will be heterozygous for both traits.

Explanation: The offsprings of this cross will be heterozygous for the two traits. Each the offspring will have one dominant allele and one recessive allele for both traits. All the offsprings will have a genotype of BbEe. B is a dominant allele and b is a recessive allele while E is a dominant allele and b is a recessive allele.

7 0
3 years ago
Which blood vessels permit the exchange of oxygen, carbon dioxide, nutrients, and waste products with body cells?
Greeley [361]

Answer: Capillaries

Explanation: Blood vessels have the same basic structures used to circulate blood of different composition to and away from the heart to the body. Blood vessels are arteries, veins and capillaries. Arteries carry oxygenated blood from the heart to the body and veins carry deoxygenated blood from the tissues to the heart.

Capillaries are the ones that work with body cells for exchange.They collect nutrients and oxygen from the blood to the cell and also collect carbon dioxide and waste from the cell to the blood which is transported to the vein where it travels via the venous system and goes through the heart, then to the lungs for gaseous exchange.

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8 0
3 years ago
The papillary layer of the dermis is composed of loosely packed connective tissue with numerous peg-like projections that provid
amid [387]

Answer:

The correct answer is option B) "The looseness allows for easy separation of the dead cell layer of epidermis to be shed".

Explanation:

The looseness of the surface are connecting the dermis to the epidermis provides several benefits, however allowing for easy separation of the dead cell layer of epidermis to be shed is not one of them. The dead cell layer of epidermis is located a the stratum corneum, which is the most superficial layer of the skin. The area that connects the dermis to the epidermis is deeper at the skin's anatomy, and is not related with the stratum corneum shedding.

5 0
3 years ago
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4 0
3 years ago
An obese client who has been diagnosed with peripheral artery disease (PAD) should be advised to do which of the following?
gizmo_the_mogwai [7]

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Option D, strive for 20-30 minutes for continuous aerobic exercise daily

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Peripheral Artery Disease (PAD) is caused by development of  plaque in the arteries which is commonly termed as atherosclerosis. The plaque reduces or limits the flow of blood which can leads to failure of organs such as kidney, may cause foot or leg amputations, and in severe cases PAD may cause heart attack, cardiac arrest or stroke. In general, a person with PAD is recommended to do treadmill walking as it allows the better flow of blood which was earlier restricted by the plaque

Hence, option D is correct

3 0
4 years ago
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