Biomolecules.

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Presentation transcript:

Biomolecules

Carbon Hydrogen Nitrogen Oxygen Phosphorus Sulfur

The Chemistry of Carbon: Organic Chemistry Why is carbon so important that is has it’s own branch of chemistry? Carbon has 4 bonding spots so it can bond with many other elements. Hydrogen, oxygen, phosphorus, sulfur, and nitrogen Living things are made up of molecules that have carbon and these other elements. These are called biomolecules. [bio] = life

Biomolecule Structure Biomolecules are polymers, long molecules made of very similar, repeating monomers. Nucleic acids Proteins Carbohydrates

Understanding the Vocabulary When we say “polymer” we are referring to the whole molecule. What would you call the entire object above? It is a chain. I would say that chains are like polymers.

Understanding the Vocabulary When we say “monomer” we are referring to the individual piece that keeps repeating. What would you call the individual pieces of a chain? It is a link. I would say that links are like monomers.

The entire chain is the polymer, and each monkey is a monomer. In this picture, what would you say is the polymer, and what would be the monomers? The entire chain is the polymer, and each monkey is a monomer.

The four major groups of biomolecules: Carbohydrates Lipids Proteins Nucleic Acids

They are the most common biomolecule. Carbohydrates are made of carbon, hydrogen, and oxygen. In a ratio of 1:2:1 (Monosaccharides) They are the most common biomolecule.

Carbs Example: Sugars This is a simple sugar Provide quick energy Monosaccharides – 1 simple sugar like Glucose C6H12O6 Disaccharides – sugars build of 2 monosaccharides like Sucrose + Fructose This is a simple sugar

Carbs Example: Starches Structural support and energy storage. Polysaccharides – many monosaccharides together! Glycogen – stores glucose in muscle tissues Cellulose – provides structure Like in a plant cell wall This large molecule is a polysaccharide.

Lipids are made of glycerol and fatty acids. (Fats)

Lipids Continued Fats are also called: Adipose Long-term energy reserves are stored in adipose cells. Saturated Solidifies – bad Examples: animal fat and butter Unsaturated No solidification – good Examples: vegetable oils

Lipids Continued Fat (adipose) provides insulation for warmth. Like in whales, seals, etc. Provides cushioning for organs.

Lipids Continued: Component of Cell Membranes Phospholipids make up cell membranes. The bilayer forms a boundary between the cell and the external environment.

This large molecule is a protein. Proteins are made of amino acids This is an amino acid This large molecule is a protein.

Protein Structure Amino acids are made of an amino group (-NH2) and a carboxyl group (-COOH) There are 20 different amino acids. 2 or more amino acids are joined by a peptide bond. That is why proteins are also called polypeptide chains.

Structure=Function The order of the amino acids determine the shape. The shape determines the function, or job, of the protein. There are four levels or protein organization.

Functions of Protein Support / Structure 2. Transport 3. Enzymes Like keratin in our nails and hair. 2. Transport Protein channels in cell membrane 3. Enzymes Catalysts that control the rate of reactions. Like Lactase (breaks down lactose in milk) 4. Contractile Muscle fibers

Nucleic acids are made of nucleotides. This is a nucleotide This large molecule is a nucleic acid.

Every nucleotide has 3 basic parts: 1. The phosphate group 2. A sugar named deoxyribose 3. One of the 4 nitrogen bases

Function of Nucleic Acids Stores genetic information used to make proteins. DNA and RNA are the main types of nucleic acids. DNA = deoxyribonucleic acid Genetic material RNA = ribonucleic acid Controls protein synthesis