Question

1. what are the steps of the dna ladder, called rungs, are known as? adenine amino acids chromosome codons cytosine dna guanine mrna nucleotides protein thymine transcription trna uracil

Explanation:

The rungs of the DNA ladder (double helix) are formed by pairs of nucleotides. Each nucleotide consists of a sugar, phosphate, and a nitrogenous base, and the rungs are created by the base - pairing (A - T, G - C) of nucleotides. Adenine, Cytosine, Guanine, and Thymine are nitrogenous bases (parts of nucleotides), amino acids are for proteins, chromosomes are DNA - protein complexes, codons are in mRNA, mRNA/tRNA are involved in protein synthesis, protein is the end product of translation, transcription is a process, and uracil is in RNA. So the rungs are made of nucleotides.

Answer:

Nucleotides