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3 years ago

7. The most widely used vector in genetically engineered recombinant DNA is a(n) __________________________.

Biology

1 answer:

Allisa [31]3 years ago

8 0

Answer:

plasmid

Explanation:

Plasmids are small circular double or singe stranded DNA molecules that are distinct from the main chromosomal DNA. They are used in genetic engineering as vectors for replication of foreign DNA or proteins using bacteria as a host organism. The DNA strand is integrated into the plasmid DNA to form a recombinant plasmid that is then transformed into the host.

Plasmids are ideal vectors because of the following characteristics:

High copy number per cell
Multiple cloning sites
Have an origin of replication
Have antibiotic resistance gene

There are also diffrent types of plasmids:

Degradative
Virulence
Resistance
Fertility
Col plasmid

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Which pair is mismatched? Multiple Choice Trypanosoma - causes African sleeping sickness Giardia - transmitted by feces in drink

Grace [21]

Answer:

Trypanosoma ------------ causes Chagas disease.

Trypanosoma -------------- causes African sleeping sickness.

Giardia --------------------- transmitted by feces in drinking water.

Trichomonas ------------ sexually transmitted.

Histoplasma ------------- causes Ohio Valley fever.

Explanation:

- Trypanosoma cruzi is a parasite transmitted by the bite of an insect of the Triatominae subfamily, very common in rural areas. It causes weakening of the heart muscle and heart failure, characteristic of Chagas disease.

- Trypanosoma brucei is a hemoparasite - found in the blood - transmitted by the tse-tse fly. Causes African trypanosomiasis or African sleeping sickness, characterized by progressive involvement of the central nervous system.

- Giardia lamblia is a parasite that is predominantly found in the duodenum. Infestation by this biological agent produces abdominal pain, nausea and belching with an unpleasant taste. It is transmitted by water contaminated with feces.

- Trichomonas vaginalis is a parasite that is transmitted through sexual contact, and produces vaginal trichomoniasis, a disease that causes inflammation and secretion in the genitals of men and women.

- Histoplasma capsulatum is a fungus that produces the disease called Ohio Valley fever (histoplasmosis), characterized by cough with expectoration, respiratory distress, fever, headache and severe muscle aches.

Learn more:

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Which specialized doctor would the husband visit if he suspected that he was infertile?

gladu [14]

I'd say an endocrinologist would be the best answer.

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Is all genetic change adaptive or can genetic changes occur withina

Igoryamba

Answer:

No, not all genetic change is adaptive.

Explanation:

This is because genetic changes happen in many ways and this can be adaptive or not.

The main form of genetic change happens through genetic mutations, and these mutations are not always adaptive.

One might think, for example, of a river polluted with a chemical reagent that causes mutations in the scale genes of the local fish population, mildly damaging the way they swim. Despite being a nonadaptive genetic change of fish, they have continued to reproduce so that this change is part of their population.

Although this happens, it is important to note that this rarely happens. Since natural selection ends up selecting the most suitable in the long run.

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