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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