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The "rungs" of the DNA ladder are made of what?

Answer 1

Natalie Ahrens

The "rungs" of the DNA strand are made up of nitrogenous bases.

The "rungs" of the DNA strand are made up of nitrogenous bases which include

#color(blue)"Guanine (G)"#
#color(green)"Cytosine (C)"#
#color(pink)"Adenine (A)," and#
#color(orange)"Thymine (T)"#

#color(white)(--------)color(blue)"G"# pairs with #color(green)"C"#
#color(white)(--------)color(pink)"A"# pairs with #color(orange)"T"#
By pairs I mean forms hydrogen bonds, which are a type of intermolecular force of attraction and one of the strongest of them all.

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Answer 2

William Albracht

The "rungs" of the DNA ladder are made of nitrogenous bases.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.