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Vera_Pavlovna [14]
3 years ago
13

In order to infect a cell, a virus must *

Biology
1 answer:
Vitek1552 [10]3 years ago
5 0

Answer:

it is b

Explanation:

because a virus particle attaches to a host cell the particle releases its genetic instuction into a host cell. the injected genetic material recruits the host cells enzymes the enzymes make parts for more new virus particles

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What will happen if external factors affect cell division in a group of cells placed in a culture dish
cluponka [151]

Answer:

The effect of an external physical factor on cell division is clearly seen in density-dependent inhibition, a phenomenon in which crowded cells stop dividing. ... When cells have formed a complete single layer, they stop dividing (density-dependent inhibition).

Explanation:

7 0
2 years ago
How is HIV contracted, and what are the treatment options?
Katena32 [7]

I believe the correct answer is: HIV is spread during unprotected sex or through contact with infected blood; it cannot be cured, but early treatment can minimize the long-term consequences.

<h2>Explanation:</h2>

Human Immunodeficiency Virus is a type of virus which causes an impairment of the immune system of the person making them susceptible to diseases such as tuberculosis, influenza and any other disease that can exploit this opportunity. It is spread by a person coming into direct contact with infected bodily fluids such as saliva during deep kissing, semen during intercourse, blood after an accident or even fluids when sharing needles and syringes for drug addicts. There is no cure but the current form of treatment slows down the virus to prevent some consequences.

<h2>Further Explanation:</h2>

The virus is enters the body through open wounds or surfaces such as the vagina or mouth where the skin is very thin and can tear. After penetrating the skin, it attaches to specific immune cells called CD8+ T-cells on points called receptors. It then enters the cell and replicates itself in the nucleus of the cell and as it goes out, it kills these immune cells making the person to have a weak immune system. The current drugs used called AntiRetroVirals (ARVs) such as the drug Zidovudin stops the virus from replicating thus reducing the total amount of virus in the body called the Viral Load. Some drugs target enzymes called proteases and reverse transcriptase that help the virus to replicate. This viral load is what is counted to estimate the total volume of HIV someone has in their body. Infected persons should use protection while having sex and also avoid sharing sharp objects to prevent transmission. They also need to take their medication to make them much more healthier in addition to taking proper balanced diets.

Level: High School

Subject: Biology

Topic: The Immune System

4 0
3 years ago
Read 2 more answers
ASAP!
drek231 [11]

Answer:

C

Explanation:

Active transport requires energy, while passive energy does not.

4 0
2 years ago
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4 0
3 years ago
Which technology allows strands of DNA to be transferred from the cells of one species into the cells of another species?
Vladimir79 [104]
D. Gene splicing. They remove specific genes in order to create a transgenic organism. 
6 0
3 years ago
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