[armydoc]

51 I am the living bread which came down from heaven; if any one eats of this bread, he will live for ever; and the bread which I shall give for the life of the world is my flesh."

58 This is the bread which came down from heaven, not such as the fathers ate and died; he who eats this bread will live for ever."

Does the Catholic Church teach that anyone who takes the Eucharist will have eternal life?

53 So Jesus said to them, "Truly, truly, I say to you, unless you eat the flesh of the Son of man and drink his blood, you have no life in you;

Does the Catholic Church teach that not taking the Eucharist precludes one from eternal life?

[NYer]

No to both questions.