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disa [49]
3 years ago
15

How long is heart cycle​

Biology
2 answers:
Elina [12.6K]3 years ago
8 0
Lasts approximately 0.8 seconds.
Monica [59]3 years ago
3 0
0.8 seconds


Hopes this help:)
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HIV can remain latent for several years and not cause any symptoms in its host. What viral reproduction cycle is occurring durin
lakkis [162]

Answer:

The lytic cycle.

Explanation:

<u>HIV is a retrovirus</u> that has a special enzyme called transcriptase reverse, which can synthesize DNA using RNA as a template. This replication system is particularly useful for the virus because the DNA synthesized from the RNA viral genome can be then integrated into the human chromosomes and stay inactive for years. This is called a lysogenic cycle and is characterized by a latency of the virus and an integration to the host DNA.

When there is a triggering event, <u>this latent virus can be excised from the human chromosome and start producing copies of itself using the host machinery.</u> <u>Then the virions are assembled and after that they lyse the host cell and release new infective units that can then infect neighboring cells. </u>This is called the lytic cycle of the virus and is the reproduction cycle that occurs when a person moves into the acquired immunodeficiency syndrome (AIDS) stage of HIV infection.

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2 years ago
Water gets soaked up by a paper towel because of the property of what?
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With water it's the high surface tension property, combined with the fiber construction of paper towels. :)
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3 years ago
An example elements nutrients faculative nutients in tissue plants N and Fe:
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The answer might be true
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3 years ago
In a humoral or antibody-mediated immune response, specific B cells are stimulated by Helper T cells to help transform into plas
steposvetlana [31]

Answer:

An important feature that B-cells must have in order to become plasma cells and synthesize antibodies is increased rough endoplasmic reticulum in order to have the surface area needed for antibody production (option A).

Explanation:

The transformation of B cells into plasma cells to produce antibodies is a well known function of lymphocytes related to the immune response. This leads to a series of structural transformations in order to performs their function.

The rough endoplasmic reticulum (RER) has the function of contributing to protein synthesis, in conjunction with the ribosomes that are attached to it and the information of the mRNA.

<em>One of the changes experienced by B cells in their transition to plasma cells is the availability of larger RERs, in preparation for antibody synthesis, formed mostly by proteins</em>.

Learn more:

Plasma cells and humoral immune response brainly.com/question/1512036

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Birds almost always migrate
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I believe it is during the day A
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