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Cards In This Set
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What is biology?
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The study of life
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Scientific Method
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1. Define a problem 2. form a hypothesis 3. design an experiment 4. collect data 5. analyze/interpret data 6 draw conclusion
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Parts of an atom
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Nucleus, protons, neutrons, electrons, electron shell, valence electrons
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Isotope
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Atoms of the same element but different number of neutrons
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Ionic vs. covalent bonds
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Ionic bonds: when electrons from one atom move to another atom Covalent bonds: when two atoms share one or more pairs of electrons
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Law of Conservation of Matter
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Matter is neither created nor destroyed during chemical reactions
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Activation energy
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Energy released when bonds are broken or created; enzymes are specialized proteins that lower the activation energy needed
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Ions
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An atom or molecule that has aquired a postiive or negative charge as a result of gaining or losing electrons
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Organic compounts contain _________
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Carbon
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Carbohydrates building blocks, elements included, functions, 3 types and examples of each:
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Monosaccarides; C H O in a 1:2:1 ratio; energy molecules; monosaccharides (ex. glucose), disaccharides (ex. sucrose), polysaccharides (ex. cellulose)
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Lipids building blocks, elements included, functinos, examples, phospholipids and cholesterol:
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3 fatty acids, 1 glycerol; C H O in a smaller %; long term energy storage, cushioning, cell membrane; fats, oils, waxes; phospholipids- molecule of glycerol combined with 2 fatty acids and a phosphate group; cholesterol- part of the membrane structure in animals
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Protein building blocks, elements included, functions, examples, what are peptide bonds, hydrophobicity:
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Amino acids; C H O N; building, structure, growth, repair, and immune system; catalase, enzymes; special type of covalent bond; helps to control how proteins fold.
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PH scale
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A scale from 0 to 14 reflecting the concentration of hydrogen ions in solution; a number less than 7 denotes acidic conditions, and a numer greater than 7 denotes basic conditions
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Characteristics of life
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Release waste, high degree of chemical organization, contain DNA, react to changes in environment, grow and develop, reproduce
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What is energy?
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The ability to do work
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