معلمات

This document discusses DNA, RNA, and the central dogma of molecular biology. It explains that DNA contains the nucleotides adenine, guanine, cytosine, and thymine while RNA contains uracil instead of thymine. The document also describes the three main types of RNA - mRNA, tRNA, and rRNA - and their roles in transcription and translation, the process by which DNA's genetic instructions are used to synthesize proteins.