RNA

**Description:** RNA (ribonucleic acid) consists of a single, uniquely coiled strand. If two complementary regions within an RNA strand are in proximity, hydrogen bonds can form between the bases. **Importance and types of RNA:** There are various types of RNA that perform diverse roles within organisms. They include: - mRNA (messenger RNA): Formed by the transcription of protein-coding genes, mRNA carries the genetic information that encodes the amino acid sequence of proteins. Its primary function is to guide protein synthesis. - rRNA (ribosomal RNA): Forms the core structure of ribosomes, where it facilitates the translation of mRNA into protein. - tRNA (transfer RNA): Responsible for selecting the correct amino acids and positioning them on the ribosome for incorporation into the growing amino acid chain. - Ribozymes: Serve as catalysts for various biochemical reactions. Ribozymes, rRNA, and tRNA are produced by the transcription of non-coding genes and do not encode protein sequences, making them examples of non-coding RNA. **Model description:** The model depicts a short segment of a tRNA molecule found in the cytoplasm of human cells. Although RNA is typically single-stranded, complementary bases within the strand can form hydrogen bonds when they come into close proximity. This model specifically depicts the nucleotide sequence GCGUUGG and its complementary sequence CCAACGC within the same strand (written in the 5' to 3' direction).