The genetic code & codon table (article) | Khan Academy
The genetic code links groups of nucleotides in an mRNA to amino acids in a protein. Start codons, stop codons, reading frame.
Intro to gene expression (central dogma) - Khan Academy
Thus, during expression of a protein-coding gene, information flows from DNA → RNA → protein. This directional flow of information is known as the central dogma of molecular biology. Non-protein …
Stages of transcription: initiation, elongation & termination (article ...
The region of opened-up DNA is called a transcription bubble. Transcription uses one of the two exposed DNA strands as a template; this strand is called the template strand. The RNA product is …
Transcription: an overview of DNA transcription (article) | Khan Academy
Transcription is the first step in gene expression, in which information from a gene is used to construct a functional product such as a protein. The goal of transcription is to make a RNA copy of a gene's …
Gene expression and regulation | AP®︎/College Biology | Khan …
Explore DNA and chromatin modifications, transcriptional regulation, and the influence of transcription factors. Examine the roles of non-coding RNAs and operons in controlling gene activity. Discover …
Transcription and mRNA processing (article) | Khan Academy
The enzyme primarily responsible for transcription is RNA polymerase. RNA polymerase uses one of a gene’s DNA strands—the template strand—to build a complementary mRNA molecule. As RNA …
DNA transcription and mRNA processing (video) | Khan Academy
Transcription involves rewriting genetic information from DNA to mRNA, with RNA polymerase playing a crucial role. In eukaryotic cells, DNA to mRNA transcription occurs within the nucleus, producing pre …
The genetic code (article) | Khan Academy
To crack the genetic code, researchers needed to figure out how sequences of nucleotides in a DNA or RNA molecule could encode the sequence of amino acids in a polypeptide. Why was this a tricky …
Nucleic acids (article) | Macromolecules | Khan Academy
Roles of DNA and RNA in cells Nucleic acids, macromolecules made out of units called nucleotides, come in two naturally occurring varieties: deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). …
mRNA code and translation (article) | Khan Academy
Understanding the genetic code and the mechanisms of translation is essential for mastering topics in molecular biology. This includes the roles of codons and anticodons in dictating protein synthesis, …