Chapter 2: The Chemistry of Living Things (Clicker Questions)

A/An _____ is a form of an element that has at least one extra neutron. isotope isomer proton electron A/An _____ is a form of an element that has at least one extra neutron. isotope An isotope is an atom with more or fewer neutrons than the usual number for its element, and is unstable, considered radioactive. © 2017 Education, Inc. Which of the following has an ionic bond? Water bound to water Oxygen bound to carbon Sodium bound to chloride Nitrogen bound to hydrogen © 2017 Education, Inc. Which of the following has an ionic bond? Sodium bound to chloride Sodium and chloride ions have permanent positive and negative charges and bind through ionic bonds. © 2017 Education, Inc. Which of the following bonds is the weakest? Hydrogen bonds Ionic bonds Covalent bonds © 2017 Education, Inc. Which of the following bonds is the weakest? Hydrogen bonds Because the electrons are shared, although unequally, they still travel to the opposing atom at some time, loosening the attraction between the two atoms in the hydrogen bond. © 2017 Education, Inc. True or false? A solution with a pH of 3 is a weaker acid than a solution with a pH of 5. True False © 2017 Education, Inc. True or false? A solution with a pH of 3 is a weaker acid than a solution with a pH of 5. False Contrary to logic, the lower the pH number from 7 to 1, the stronger the acid. On the alkaline side, the higher the number from 7 to 14, the stronger the base. © 2017 Education, Inc. Which of the following terms best categorizes ATP? Polysaccharide Nucleotide Amino acid Fatty acid © 2017 Education, Inc. Which of the following terms best categorizes ATP? Nucleotide ATP, or adenosine triphosphate, is a nucleotide, consisting of a ribose (sugar), adenine (nitrogenous base), and three phosphate groups. © 2017 Education, Inc. Enzymes are _____ that increase the rate of biochemical reactions. carbohydrates proteins lipids nucleic acids © 2017 Education, Inc. Enzymes are _____ that increase the rate of biochemical reactions. proteins The term enzyme is applied to a specific function of a type of protein that facilitates chemical reactions. © 2017 Education, Inc.