Anatomy and Physiology Study Set 1

Biology

Quiz 2 :

Chemical Basis of Life

Quiz 2 :

Chemical Basis of Life

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Chemistry is the branch of science that deals with the composition of matter.
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True False
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True

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Matter is anything that has weight and takes up space.
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True False
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True

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The atomic weight of an atom of an element equals the number of neutrons in its nucleus.
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True False
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False

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Sodium and chloride ions readily combine because they have opposite charges.
True False
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A covalent bond is formed when two atoms share electrons.
True False
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The molecular formula for compounds like sodium chloride (NaCl) indicate the relative amounts of each element present.
True False
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When two pairs of electrons are shared, the resulting bond is called a double covalent bond.
True False
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Water is an example of a compound.
True False
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A molecular formula represents the numbers and types of atoms in a molecule.
True False
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During an exchange reaction, the bonds of a reactant molecule break so that simpler molecules, atoms, or ions are formed.
True False
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A synthesis reaction occurs when two or more atoms (reactants) bond to form a more complex structure (product).
True False
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A pH value indicatesthe hydrogen ion concentration in solutions such as body fluids.
True False
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A substance that dissociates and releases hydrogen ions into water is classified as a base.
True False
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An acid is defined as an electrolyte that releases hydroxide ions (OH -) in water.
True False
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Within a solution, buffers combine with hydrogen ions when H + ions are in excess or they donate hydroxide ions when H + ions are depleted.
True False
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A saltis a compound composed of oppositely charged ions.
True False
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Cells use oxygen to release energy from glucose.
True False
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The building blocks of triglyceride molecules are amino acids.
True False
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Cholesterol is a type of protein.
True False
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Steroid molecules consist of four connected rings of carbon atoms.
True False
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