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Sonbull [250]
4 years ago
9

A young adult is exposed to a virus that infects and replicates in mucosal epithelial cells of the upper respiratory tract. One

component of the protective immune response to this viral infection is mediated by CD8 cytolytic T lymphocytes (CTLs), which recognize and kill virus-infected cells. The CTLs can recognize and kill the infected cells because ______
Biology
1 answer:
marishachu [46]4 years ago
3 0

Answer:

The CTL has specific receptors that can recognize infected or damaged cells.

Explanation:

The cytotoxic T cells (CTL) is a type of white blood cells that specifically helps in destroying virus-infected cells (also damaged cells and cancer cells).

This type of cells has a special receptor called T-cells receptors (TCR) which ones recognize specific antigens (molecule that stimulate the immune systems because are “strange” to them). Virus inside a cell could bind to a special molecule called class I MHC, this molecule moves the virus to the surface of the cell where it can be recognized by a CD8+ specific antigen-receptor of the CTL.

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Aneli [31]

Answer:

The correct option is formation of bone from within fibrous membranes.

Explanation:

The process of intramembranous ossification results in the production of bones from the fibrous membranes. The mesenchymal cells get differentiated into different kinds of osteoblasts. The process of intramembranous ossification occurs in the skull. In other parts where bones are to be formed by this process, the mesenchymal cells get converted into cartilage first. The cartilage will then be converted or replaced into bones.

Bones at the base of the skull and the long bones are produced by endochondral ossification.

5 0
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2.) If you wanted to express a large eukaryotic gene in a prokaryotic organism, what steps would be necessary? Describe your pro
alina1380 [7]

Answer:

Explanation:

The eukaryotic genes of interest can be expressed in the prokaryotic genome or plasmid vector. The following are the steps used for the purpose of expression of eukaryotic genes in the prokaryotic genome.

1. Amplification of the target gene of interest from the eukaryotic genome by PCR or polymerase chain reaction.

2. The selection of the plasmid and digestion of the plasmid DNA with the restriction enzyme.

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4. Introduction of the ligated plasmid into the prokaryotic host organism.

5 0
3 years ago
Write some advantages of molecular formla of compounds
Leni [432]

The molecular formula of an organic compound indicates the number of atoms of each element that make up a molecule of the substance and the proportion between them.

<h3>What is the molecular formula?</h3>

The molecular formula indicates the actual number of atoms of each type of chemical element that appears in the molecule. For example, the molecular formula for water is H2O, which means that in every water molecule there are two hydrogen atoms bonded to one oxygen atom.

With this information, we can conclude that the number of atoms of each element that make up a molecule of the substance and the proportion between them is called molecular formula

Learn more about molecular formula  in brainly.com/question/14425592

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6 0
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Evolution is just a theory which means there isn't much evidence to support it. True or False? If true give a reason why It’s tr
11Alexandr11 [23.1K]

Answer:

False

Explanation:

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olga_2 [115]

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