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3 years ago

Cytotoxic T (Tc) cells are like a natural killer (NK) cell because they both

Biology

1 answer:

denis-greek [22]3 years ago

7 0

Answer:

B. secrete granzymes and perforin.

Explanation:

Perforins are the proteins that perforate the plasma membrane of the target cell and lead to bursting of cells due to holes formed in its membrane. Granzymes are the proteolytic enzymes. They serve to stimulate the target cells to kill themselves by the process of apoptosis.

Binding of natural killer cells to their target cells stimulate the release of granules that are filled with perforins or granzymes to kill the target cells.

Likewise, cytotoxic T cells bind to the infected body cells and release the granules filled with perforins or granzymes to kill those infected cells.

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What do you call the brief glow behind a meteor? A.wake B.flash C.afterglow D.trail

sammy [17]

Answer:

A wake

Explanation:

Wake is the brief glow behind the meteor head. The wake is caused mainly by the green light of neutral oxygen atoms. Wakes last 1-10 seconds. Sometimes the term wake is also used to describe the area directly behind the meteor head.

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3 years ago

Read 2 more answers

*What two kinds of molecules would be used to support evolution ?

Tpy6a [65]

Answer: Multiple types of evidence support the theory of evolution: Homologous structures provide evidence for common ancestry, while analogous structures show that similar selective pressures can produce similar adaptations (beneficial features).

Explanation:

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3 years ago

What cell parts are common to all of these cells? Use complete sentences.

Natalka [10]

Answer:

between an animal cell and a plant cell there are some parts that are similar and carry out the same function like:

both have a cell membrane which selects what goes in the cell.

both have cytoplasm which holds the protoplasm(the living part of the cell)

both have a nucleus which carries out all cell activities and holds threads of DNA called chromosomes

both have a mitochondria which is the power house of the cell

both have golgi bodies which modify and carry proteins from sites of synthesis to sites of reaction

I hope this helps

4 0

3 years ago

Tony spaces 5 plants apart equally along a line, with the first plant directly in front of a window and the last plant 30 feet a

love history [14]

Answer:

The correct answer would be - C. He is monitoring oxygen. The amount of gas released should be highest for the plant closest to the window and lowest for the plant farthest away from the window.

Explanation:

The release of the oxygen gas in the process of photosynthesis depends on the rate of photosynthesis which depends on various factors such as carbon dioxide, light, and water. In this experiment air (carbon dioxide), water is constant only factors that are changed is light, and an increase in the light energy increase the rate of photosynthesis, and a decrease in the intensity of light depend decreases the rate of photosynthesis.

Thus any change in the light would affect the release of the oxygen gas which is measured through this experiment and gas released should be lowest for the plant farthest away from the windowand highest for the plant closest to the window.

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3 years ago

Name 2 gases that more into or out of our bodies by diffusion A LEVEL BIOLOGY

bulgar [2K]

Oxygen and carbon dioxide

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4 years ago