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Bio1 Chapter 6 Vocab

TermDefinition
Observation orderly, direct info. gathering about a natural phenomenon
Inference assumption based on prior experience.
Scientific Methods Series of problem-solving procedures (observation, hypothesis, experiment, data, conclusion).
Hypothesis Testable explanation of a situation.
Experiment Procedure performed in controlled setting to test a hypothesis and collect precise data.
Control Group In controlled experiment, group not receiving factor being tested
Experimental Group In controlled experiment, the group receiving factor being tested.
Independent Variable One factor that can be changed in controlled experiment, in factor tested and affects experiment outcome
Dependent Variable Factor being measured in controlled experiment, its value changes in independent variable
Constant Factor that remains fixed during an experiment while independent and dependent variable change
Data Quantitative or qualitative info. gained from scientific investigation.
Metric System Measurement system whose divisions are power of ten.
SI System of measurement used by scientists, abbreviation of the International System of Units.
Active Site Specific place where substrate binds on enzyme.
Catalyst Substance that speeds up chemical reaction by reducing activation energy.
Amino Acid Carbon compound joined by peptide bonds; building block of proteins
Carbohydrate Organic compound containing carbon, hydrogen, and oxygen in a ratio of one oxygen and two hydrogen atoms for each carbon atom
Van der Waals forces Attraction forces between molecules
Atom Building block of matter; contains subatomic particles
Nucleus Center of atom; contains cell membrane-bound organelle that manages cellular functions
Isotope Two or more atoms of the same element having different number of neutrons
Molecule Compound whose atoms are held together by covalent bonds
Enzyme Protein that speeds up a biological reaction by lowering activation energy needed to start reaction
Chemical reaction Energy requiring process which atoms or groups of atoms are changed into different susbtances
Substrate Reactant which an enzyme binds
Solute Substance dissolved in a solvent
Solvent Substance in which another substance is dissolved
Acid Substance that releases hydrogen ions when dissolved in water has a ph less than seven
Base Substance that releases hydroxide ions when dissolved in water, has a ph more than seven
Ph Measure of concentration of hydrogen ions in a solution
Buffer Mixture that can react with acid or base to maintain ph with specific range
Mixture Combination of two or more different substances, it keeps its individual characteristics
Macromolecules Large molecule formed by joining smaller organic molecules together
Protein Organic compound made of amino acids joined by peptide bonds, primary building block of organisms
Hydrogen bond Weak electrostatic bond formed by the attraction of opposite charges between a hydrogen atom and an oxygen, fluorine, or nitrogen atom
Created by: RealG54