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Alenkasestr [34]
3 years ago
11

All the following statements about uncontrolled cellular division are true EXCEPT

Biology
1 answer:
larisa86 [58]3 years ago
8 0

Answer:

C

Explanation:

You can not control your DNA.

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Which of the following is not a typical pattern found in the Earth system?
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Answer:

D. calcium cycle

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Can octopuses grow their fangs back?
zhenek [66]

Answer:

hi

Explanation:

i think they can't.But they can regrow their arms

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3 years ago
Receptor binding motifs such as RGD have highly selective recognition for cell adhesion. Outline a strategy for incorporating a
Nana76 [90]

Answer:

Explanation:

RGD stands for Arginine Glycine Aspartate and is a three-amino-acid peptide. It is the most extensively utilized adhesive peptide for adhering diverse cell types to a variety of biomaterials. Integrins, fibrinogen,  osteopontin, fibronectin, and bone sialoprotein, as well as collagens and laminins, all include an RGD primary binding domain. As a result, the synthetic (artificial) peptide RGD may bind to a wide range of integrin types. The artificial RGD retains its functioning through the sterilizing and processing processes of biomaterial creation because of its recognition advantage. This feature denotes the immune reactivity and pathogen transmission during xenograft.

Affinity can be modulated by the conformation of artificial RGD. The efficacy of RGD is also determined by the in vitro deposition of cells on the surface of the material sample.

The molecular processes unravel its effectiveness throughout its use as a scaffold foundation in in-vivo models. The fact that artificial RGD cannot work well in isolation is now a major aspect that defines its activity.

It has been discovered that cells release a variety of integrin-binding proteins that are more effective in activating integrin signalling than pure RGD. As a result, most biomaterials will bind and adsorb these proteins rather than RGD. As a result, a serum-free medium is employed in the majority of in vitro research.

As a result, biomaterials are supplied with RGD as well as quasi polymers such as polyethylene glycol to reduce the variance produced by native proteins. The addition of additional amino acids to RGD based on natural sequences can increase its biological activity, which can aid in the development of new tissues and the stimulation of cellular responses and signalling.

The amino terminal endpoint of the peptide, as well as the carboxyl group of the material surface, establish a covalent connection, which binds the peptide to just the surface of its biomaterial. Cell adhesion biomaterials are made from a variety of cell adhesion materials, including poly-L-lysine, mussels adhesive protein (MAP), and outer membrane (extracellular matrix) proteins.

Because MAPS are high in Dihydroxyphenylalanine and lysine, RGD is coupled with either of these to boost its cell adhesion capability. As a result, they can also aid in the attachment to damp or moist surfaces. It may also firmly adhere to glass, metals, and plastics. The addition of thiol groups to a peptide can also aid in its orientation and boost its stability.

The gap and density of this peptide sequence and structure on the biomaterial surface may be adjusted using a micro and nanotechnology (nanoscale patterning) method, which also improves ligand binding accuracy. Cellular reactions and cell activity are also under its control. Integrin receptors have been shown to be between 9 - 12 nm in size, therefore nanoscale surface patterning is crucial.

As a result, the above methods serve as a strategy for incorporating a cell adhesion recognition domain into a biomaterial while taking into account all of the technical intervention affecting its quantity, type, and affinity to the top layer for cell adhesion as a functioning tissue rather than a monolayer.

3 0
3 years ago
Which statement is true of an intranet? a. It aids the duplication and distribution of documents. b. It helps organizations move
Schach [20]

Answer: The answer is A) It aids the duplication and distribution of documents.

Explanation:

An intranet is a kind of website which can be used by any company but, internally. It means, it is a private web page, for this reason it is accesible just for people who have received authorization by the owners of this site. This is a good tool, because it allows the distribution and duplication of documents, programs or softwares in a short time. Also, thanks to this resource, time and costs can be reduced since people can access from different places. They can have meetings or send files and it does not matter where they are. As people can use intranet wherever, they can work and be more productive for the company.

3 0
3 years ago
In alternation of generations, what is the diploid stage of a plant that follows fertilization called? see concept 13.2 (page)
Wewaii [24]
The diploid stage of a plant that follows fertilization is called sporophyte.   <span>The diploid plant stage is called the sporophyte and it produces spores through meiotic (asexual) division. The multicellular haploid plant stage is called the gametophyte, which is formed from the spore and give rise to the haploid gametes.</span>
8 0
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