A&P 1 Practice Test Ch. 2 – Flashcards
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electron
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Which subatomic particle carries a negative charge?
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protons in an atom
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The atomic number represents the number of ______
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ionic bond
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The formation of a cation and an anion is indicative of ______.
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endergonic reacton
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What type of reaction is A + B + energy --> AB?
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increased reactant concentration
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Which of the following increases the rate of reaction?
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enzymes speed chemical reactions by lowering the activation energy
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Which statement best describes enzyme function?
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pH1
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On the pH scale, which number has the highest concentration of hydrogen ions?
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respiratory and urinary
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Which two organs systems work to maintain pH balance in the body?
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ionic bonds
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Salts are held together by ______.
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monosaccharide
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The monomer of the carbohydrates is _______.
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polyunsaturated
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A fatty acid that contains two or more double covalent bonds is_______.
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proteins
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Amino acids are the monomer for _______.
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atomic number
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Which of the following is the same among isotopes of the same elements?
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product
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In the following chemical reaction, what is NaCl? NaOH + HCl --> NaCl + H2O
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7
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Determine the number of protons in an isotope of nitrogen with an atomic number of 7 and a mass number of 14.
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total number of protons
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What predicts the element to which an atom belongs?
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oxygen, nitrogen, hydrogen, carbon
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The four most common elements, comprising 96% of the body's mass are _______.
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sum of protons and neutrons
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What contributes to the calculation of the mass number?
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reactive
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Atoms that satisfy the octet rule are said to be ______.
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False
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True or False: In a solution, the solute dissolves the solvent.
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the transfer of electrons from a metal to a nonmetal
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Ionic bonds result from _______.
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Electron exchange occurs
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What happens in oxidation-reduction (redox) reactions?
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AB + CD --> AD + BC
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Which of the following represents an exchange reaction?
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False
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True or False: Enzymes bind with substrates at their active sites and are permanently altered by the binding process.
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base
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What chemical binds free hydrogen ions in solution?
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Buffers prevent large swings in pH when an acid or base is added to a solution
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What is the function of a buffer?
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False
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Solutions with a pH less than 7 are considered basic or alkaline.
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monomers
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Building blocks of organic molecules are known as _______.
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protein
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Amino acids are the monomers
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lipid
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Examples include phospholipids, triglycerides, and steroids.
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carbohydrate
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Monomers are composed of carbon, hydrogen, and oxygen in a 1C:2H:1O ratio.
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nucleic acid
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Nucleotides are the monomers that form deoxyribonucleic acid and ribonucleic acid.
