BOTH hypotheses on the origins of eukaryotes agree that

A) eukaryotic cells are chimeras with attributes of Archaea and Bacteria

B) the nucleated cell arose after the endosymbiosis event

C) the nucleated cell arose before the endosymbiosis event

D) the nucleated cell was a direct descendant of a bacterial cell

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Jean KeelingLv2

17 Dec 2019

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Which of the following is an example of endosymbiosis?

a eukaryotic cell was ingested by a prokaryote and eventually became an organelle.

a white blood cell engulfs a microbe.

a prokaryotic cell was ingested by a eukaryote and eventually became an organelle.

a structured community of bacterial cells on a surface.

Which of the following is false regarding MHC molecules?

	A.	Professional antigen-presenting cells are the only cells in the body that express class II MHC molecules
	B.	The vertebrate MHC locus encodes multiple class I and class II MHC genes as well as components of the complement cascade and the antigen-processing machinery
	C.	Class I MHC molecules are present on most, if not all, nucleated cell membranes
	D.	T cells specifically and exclusively recognize antigen in complex with class II MHC