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3 years ago

A _______________________ recognizes and destroys cells infected by a virus.

2 answers:

8 0

A cytotoxic T cell recognizes and destroys cells infected by a virus. They are also responsible for killing cancer cells too.

galina1969 [7]3 years ago

6 0

Answer:

c)cytotoxic T cell is the correct answer.

Explanation:

On the surface of the Cytotoxic T cell, TCR's receptors and a cluster of differentiation (CD8) receptors are present.

The cells infected by a virus produce viral proteins and these viral protein are present on their membrane

Cytotoxic T cells kill the virus-infected cell when their receptors TCR's match with the viral antigen and as they recognize the cell infected with the virus they produce cytokines that eliminate the infection.

Thus cytotoxic T cell recognizes and destroys cells infected by a virus.

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What is a function of a protein marcomolecule?

Furkat [3]

Answer:

Proteins are a class of macromolecules.

Explanation:

Proteins are a class of macromolecules, that can perform a diverse range of functions for the cell. They help in metabolism by providing structural support and by acting as enzymes, carriers or as hormones. The building blocks of proteins are amino acids.

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3 years ago

The element fluorine's outermost energy level can hold eight electrons. Study the diagram of fluorine, and then determine if the

Bingel [31]

<h2>The answer is False</h2>

Explanation:

Fluorine is a Chemical element. Its symbol is F. Its atomic number is 9. Fluorine is a lightest in nature. It is a diatomic pale yellow gas.

Except helium, neon and argon, fluorine is highly reactive to react with other elements.

The reason for it is false, because the outermost energy level of fluorine is not filled.

Fluorine becomes stable, when it forms an ionic bond with another atom.

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3 years ago

Which is a predator/perey relationship?

Romashka [77]

Answer:

Explanation:

Predator-prey relations refer to the interactions between two species where one species is the hunted food source for the other.

6 0

3 years ago

Read 2 more answers

Help with question 2. A B & C. the gizmo is Cell Types

Mariulka [41]

A. Fine Focus.

B. Nucleus, Cytoplasm, and membrane

C. 30 Micrometer.

Erythrocytes are well known to have no nucleus but in fact, they lack most organelles such as the Golgi apparatus endoplasmic reticulum and mitochondria. Hair consists of two parts the root and the hair shaft. The root is the part of the living hair located in the middle layer of the skin the dermis.

Epidermal root cells in some plants produce root hairs and tubular growths that increase the surface area of the root. Unlike other cells in the body, red blood cells do not have a nucleus. This habit dates back to when mammals began to evolve. Other vertebrates such as fish reptiles, and birds have erythrocytes that contain dormant nuclei. To allow red blood cells to carry an increased load of oxygen cells evolved to function without a nucleus and other associated organelles.

Learn more about Cell Types here:-brainly.com/question/342784

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6 0

1 year ago

What reasoning correctly pairs a body system with its relationship to the digestive system?

Elodia [21]

excretory system: removes waste from blood.

respiratory system: obtains oxygen so the energy in the nutrients can be extracted.

circulatory system: transports nutrients from small intestine to the othet tissues.

nervous system: regulates and controls digestive functioning.

( Am not completly sure, but i think this is the answer)

8 0

3 years ago