Understanding Translation, Proteins, and Enzymes in Biology

Translation

• mRNA (Messenger RNA): Conveys genetic information from DNA to the ribosome.
• tRNA (Transfer RNA): Helps decode the mRNA sequence into a protein.
• rRNA (Ribosomal RNA): The RNA component of the ribosome, essential for protein synthesis.
• Ribosome: Protein builders that connect one amino acid at a time to build long chains.
• Codon: A sequence of three DNA or RNA nucleotides in mRNA.
• Anticodon: Binds with the codon in the ribosome.
• Amino Acid: A simple organic compound.
• Start Codon: The first codon of an mRNA transcript translated by a ribosome.
• Stop Codon: A nucleotide triplet within mRNA that signals the termination of translation.
• Peptide Bond: A covalent chemical bond formed between two amino acid molecules.
• Polypeptide: An organic polymer consisting of a large number of amino acid residues bonded together.

Proteins

• Amino Acid: A simple organic compound.
• Polypeptide: An organic polymer.
• Hydrophilic: The tendency to mix with water.
• Hydrophobic: The tendency to repel water.
• Protein: Any class of nitrogenous organic compounds composed of one or more long chains of amino acids.
• Primary Protein Structure: The linear sequence of amino acids in the polypeptide chain.
• Secondary Protein Structure: Folds the peptide chain into an alpha helix, beta sheet, or random coil.
• Tertiary Protein Structure: The geometric shape of a protein; a single polypeptide chain with one or more secondary structures.
• Quaternary Protein Structure: The number and arrangement of multiple folded protein subunits in a multi-subunit complex.
• Sickle Cell Anemia: A hereditary form of anemia in which a mutated form of hemoglobin distorts red blood cells into a crescent shape at low oxygen levels.

Enzymes

• Enzyme: A protein that acts as a catalyst for reactions in cells.
• Catalyst: A substance that increases the rate of a chemical reaction without undergoing permanent change.
• Substrate: A substance on which an enzyme acts.
• Activation Energy: The minimum quantity of energy that reacting species must possess to undergo a specified reaction.
• Active Site: A region on an enzyme that binds to a substrate during a reaction.
• Denaturation: A process in which proteins or nucleic acids lose their quaternary, tertiary, and secondary structures.
• Catalase: An enzyme that catalyzes the reduction of hydrogen peroxide.
• Rate of Reaction: The change in concentration of the product per unit time.