Chapter 6, Review 3: Question Preview (ID: 2583)


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What type of macromolecule stores an organism's genetic information?
a) DNA b) protein c) lipid d) carbohydrate
The best example of a solution is:
a) blood b) seawater c) paint d) milk
The property that is responsible for the fact that water and oil do not mix is:
a) density b) polarity c) phase d) mass
Two substances combine producing heat is evidence that a chemical reaction happened.
a) No, heat is not a chemical b) Yes, energy is released c) Yes, energy is absorbed d) No, this is a physical change
Elements are pure substances made up of only one kind of:
a) atom b) element c) bond d) molecule
What increases the rate of a reaction by lowering the activation energy?
a) enzyme b) catalyst c) nucleic acid d) sugar
The bond due to the electrostatic attraction between adjacent water molecules is called:
a) ionic bond b) covalent bond c) hydrogen bond d) polar bond
A neutral atom contains 18 protons, how many electrons does it contain?
a) 12 b) 9 c) 18 d) 0
What type of chemical reaction takes place when heat is released into the environment?
a) endothermic b) exothermic c) polar d) catalytic
Elements in Group 1 in the periodic table of the elements have how many outer electrons?
a) 0 b) 1 c) 4 d) 8
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