The Structure and Function of Biomolecules
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1 The Structure and Function of Biomolecules
2 The student is expected to: 9A compare the structures and functions of different types of biomolecules, including carbohydrates, lipids, proteins, and nucleic acids
3 KEY CONCEPT Carbon-based molecules are the foundation of life.
4 Humans use food for: 1. Energy 2. Growth of new cells and the repair of existing cells, tissues, organs, etc.
5 What is Food made up of? Six chemical elements: C, H, O, N, P, S Salts Na, Mg, Cl, K, Ca Three trace elements: Fe, Cu, Zn Other
6 Carbon atoms have unique bonding properties. Carbon forms covalent bonds with up to four other atoms, including other carbon atoms. Carbon-based molecules have three general types of structures. straight chain branched chain ring
7 Many carbon-based molecules are made of many small subunits bonded together. Monomers are the individual subunits. Polymers are made of many monomers.
8 Four main types of carbon-based molecules are found in living things. 1. Carbohydrates 2. Lipids 3. Proteins 4. Nucleic Acids Carbohydrates Lipids Proteins Nucleic Acids
9 Types of Carbohydrates Carbohydrates include sugars and starches. Monosaccharides are simple sugars. Polysaccharides include starches, cellulose, and glycogen. Glucose is a carbohydrate!
10 Structure of Carbohydrates Carbohydrates are made of carbon, hydrogen, and oxygen.
11 Structure of Carbohydrates Polymer (starch) Starch is a polymer of glucose monomers that often has a branched structure. Polymer (cellulose) monomer Cellulose is a polymer of glucose monomers that has a straight, rigid structure
12 Functions of Carbohydrates Carbohydrates can be broken down to provide energy for cells. Some carbohydrates are part of cell structure. Carbohydrates are also used for short-term energy storage.
13 Structure of Lipids Lipids are made of the elements carbon, hydrogen, oxygen and phosphorus.
14 Structure of Lipids Lipids are nonpolar molecules that include fats, oils, and cholesterol. Many contain carbon chains called fatty acids. Fats and oils contain fatty acids bonded to glycerol. Triglyceride
15 Lipids have several different functions. broken down as a source of energy Store large amounts of energy long term make up cell membranes and other biological membranes used to make hormones
16 Types of Lipids Fats and oils have different types of fatty acids. saturated fatty acids unsaturated fatty acids
17 Examples of Lipids Phospholipids make up all cell membranes. Phospholipid Fats Oils Waxes Cholesterol
18 Structure of Proteins Proteins are made of the elements carbon, hydrogen, oxygen, nitrogen and sulfur.
19 Structure of Proteins Proteins are polymers of amino acid monomers. Twenty different amino acids are used to build proteins in organisms.
20 Structure of Proteins Proteins are polymers of amino acid monomers. Twenty different amino acids are used to build proteins in organisms. Amino acids differ in side groups, or R groups.
21 Structure of Proteins Proteins are polymers of amino acid monomers. Twenty different amino acids are used to build proteins in organisms. Amino acids differ in side groups, or R groups. Amino acids are linked by peptide bonds.
22 Structure of Proteins Proteins differ in the number and order of amino acids. Amino acids interact to give a protein its shape. Hemoglobin hydrogen bond Incorrect amino acids change a protein s structure and function.
23 Function of Proteins regulate cell and body processes build cell structures building blocks of structures in organisms proteins called enzymes regulate chemical reactions in cells
24 Examples of Proteins enzymes skin hair connective tissues hemoglobin fibers in muscle tissue hormones
25 Structure of Nucleic Acids Nucleic acids are made of the elements carbon, hydrogen, oxygen, nitrogen and phosphorus.
26 Structure of Nucleic Acids Nucleic acids are polymers of monomers called nucleotides.
27 Structure of Nucleic Acids Nucleic acids are polymers of monomers called nucleotides. Nucleotides are made of a sugar, phosphate group, and a nitrogen base. A phosphate group nitrogen-containing molecule, called a base deoxyribose (sugar)
28 Types and Functions of Nucleic Acids DNA stores genetic information. DNA RNA builds proteins. RNA Nucleic acids are NOT used for energy!
29 KEY CONCEPT All cells need chemical energy.
30 Molecules in food store chemical energy in their bonds. Starch molecule Glucose molecule
31 Organisms break down carbon-based molecules to produce ATP. Carbohydrates are the molecules most commonly broken down to make ATP. not stored in large amounts up to 36 ATP from one glucose molecule adenosine triphosphate tri=3 adenosine diphosphate di=2
32 The chemical energy used for most cell processes is carried by ATP. ATP transfers energy from the breakdown of food molecules to cell functions. Energy is released when a phosphate group is removed. ADP is changed into ATP when a phosphate group is added. adenosine triphosphate phosphate removed tri=3 adenosine diphosphate di=2
33 Fats give you the most energy NOT carbohydrates and proteins! Fats store the most energy. 80 percent of the energy in your body about 146 ATP from a triglyceride Proteins are least likely to be broken down to make ATP. amino acids are not usually needed for energy about the same amount of energy as a carbohydrate
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