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Chapter 2 Biology Te

Biology Test chapter 2

Atom The study of Chemistry begins with the basic unit of matter.
Nucleus Strong forces bind protons and neutrons together
Electron A negatively charged particle
Proton A positively charged particle
Neutron A neutral charged particle
Element A pure substance that consists entirely of one type of atom
Compound A substance formed by the chemical combination of 2 or more elements in definite proportions
Molecule The smallest unit of compounds
Covalent Bonding Forms when electrons are shared between atoms
Ionic Bond Formed when one or more electrons are transfered from one atom to another
Macromolecule Made from thousands or even hundreds of thousands of smaller molecules
Monomer The smaller units
Polymer Monomers join together to form polymers
Lipids Used to store energy
Carbohydrates Main source of energy
Protein Macromolecules that contain H,C,N, and O
Amino Acids Proteins are polymers of molecules
Nucleic Acids Macromolecules containing H,O,N,C, and Ph
Chemical Reaction A process that changes one set of chemicals into another
Enzyme Speed up chemical reactions that take place in cells
Reactants Elements or compounds that enter into a chemical reaction
Products The elements or compounds produced by a chemical reaction
Subtrate The reactants of enzyme catalyzed reactions
Activation Energy Energy that is needed to get a reaction started
Why is a Carbon Special? Carbon atoms have 4 valence electrons. Carbon can bond with many elements.
Compare and Contrast the functions of lipids and Carbohdrates Both used to store energy, some lipids are important parts of biological membranes.
Explain how a catalyst affects a reaction It is a substance that speeds up the reaction
Why do living things depend on enzymes? Because it lowers activation energy.
What do Chemical bonds have to do with a Chemical Reaction? Because a chemcial reaction changes a set of chemicals
Created by: tatummilo333



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