Natural killer cells
a. are known for attacking large parasites, such as tapeworms.
b. engulf pathogens and present antigens to T cells.
c. recognize the absence of MHC-I molecules on a cell surface.
d. produce antibodies

Answer

c

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Biology

Chapter 33

The Lymphatic and Immune Systems

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Video Transcript

Okay, so Chapter 33 problem 10. We're looking at natural killer cells and natural killer cells. Just gonna previous nk here are these largely emphasize quite large, and they kill the killer sort of smaller virus infected ones. Right. So these is, sir, our virus infected cells and how they recognize it, how they're able to come up and kill it. Um, well, 1st 1st day after I come into contact with it, rightly, they come into contact with it, um, and rub against it and they're looking for something. They're looking for a particular particular, uh, sort of molecule. Um, just actually called the age. See, your major is the compatibility complex one that's sort of a self A self Markkula. It's like a, uh, self identification Little molecule, uh, that one would produce. But once they get a virus, and then they no longer have that no longer producing these self molecules. So the the killer cell, if there's an absence, an absence of of the self molecule knows that it's infected in and just kill that cell. Eso. So how the natural killer cells work is by recognizing the absence of the image, see one molecules. And so the correct answer here is going to be C

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