Which of the following occurs during apoptosis?
(A) lysis of the...

Question

Which of the following occurs during apoptosis?
(A) lysis of the cell
(B) direct contact between signaling cells
(C) fragmentation of the DNA
(D) release of proteases outside the cell

Accepted Answer

Hi everyone. Let's look at our next problem. The programmed death of a cell in which its DNA in the nucleus gets chopped up into small pieces and some organelles break down into fragments is called blank. And our choices are a necrosis. Be apoptosis, G. Fado psychosis or D autopsy gee. Well, let's recall from our content videos when we've got a programmed death of a cell. So it's occurring to do two signals given to the cell and it involves a regulated breakdown of the cell components. So that comes we see in our question, the DNA in the nucleus gets chopped up organelles breakdown. This process. We recall from our content videos is called apoptosis which is right here in choice B But let's look at our other choices to understand why they are not describing what's happening here. So the closest one was a necrosis would be the easiest to get confused here because this is another form of cell death. But this is a premature cell death. Um It's a result of external causes such as trauma or infection and it results in unregulated breakdown of those cell contents and as of self contents are breakdown. They're released into the surrounding tissue and this can cause a lot of damage to the organism that causes an inflammatory response. Unlike the regulated breakdown that occurs in apoptosis, which is done to prevent that from harming the organism. So apoptosis pre programmed from internal signals with a regulated breakdown, resulting in no damage versus necrosis, which is resulting from injury, trauma, other external factors. A premature death of cells and living tissue with unregulated breakdown that can cause damage. So that would be the most likely thing to confuse there. Just to be thorough. We'll go through, we've got fabio psychosis and this is the process. Um We think of it most commonly with the immune system cells, the immune system, whereas cell um the cell membrane surrounds and encapsulates a large particle. So this is used by the immune system to engulf viruses or bacteria, foreign um things that come into the body. And it can also be used to take care of any other breakdown products or things like that. So it's there's this process of uh enclosing and destroying foreign matter in the organism. And then finally, autopsy gee, it's sort of the cells recycling system whereby old or damaged cell components are broken down and repurposed. So the cell the body almost body cells almost sort of digesting themselves can occur and fasting when the body has to break down its own tissue to provide food or starvation in an extreme sense. So again, this program, death and which is a regulated breakdown of the cell components. Is choice be a apoptosis. Thanks for watching. See you in the next video

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