Biology Jeopardy Ch 2 Review

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Biology Jeopardy Ch 2 Review
Section 1
Section 2
Section 3
Section 4
Labs
Terms
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A weak attraction between polar molecules is
called a ____ bond.

• hydrogen

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Atoms share electrons in a ____ bond.
covalent
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True or False Covalent bonds form when two or
more atoms share electrons.
True
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A nucleotide has four parts? True or False
False they have 3 parts
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A substance that is composed of only one type of
atom is called a(n)
Element
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Acidic solutions have a pH that is
less than 7.
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Hydrogen ions, H, react with hydroxide ions,
OH-, to form
Water
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When placed in the same container, oil and water
do not mix because
water is polar and oil is nonpolar.
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Water is important to life because it?
surrounds all cells, is found inside cells,
and influences the shape of the cell membrane.
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_____ allows a needle to float on the water.
Surface tension
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A molecule shaped like a spiral staircase (double
helix) is typical of
deoxyribonucleic acid.
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ATP (adenosine triphosphate) stores energy for
cells to use in the bonds between its
phosphates.
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DNA stores
heredity information.
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The two types of nucleic acids are
DNA and RNA.
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The shape of a protein is primarily determined by
the type and sequence of its amino acids.
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Most enzymes are?
proteins
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Energy needed for metabolism comes from?
Foods lipids, proteins, carbohydrates
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____ are biological catalysts.
enzymes
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The molecule on which an enzyme acts is called
a(n)
substrate.
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Without enzymes, the chemical reactions in your
body would
occur too slow to support life processes.
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Benedicts solution is used to detect the
presence of?.
reducing sugars, such as glucose.
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Lugols iodine solution is used to detect the
presence of
starch.
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Amylase is a digestive enzyme that breaks down
starch into
cellulose.
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Due to the polarity of water, compounds that
dissolve best in water contain
polar bonds.
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Many laundry detergents contain _____, which make
removal of stains easier.
enzymes
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made of only one type of atom
element
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attraction between different substances
adhesion
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attraction between molecules of the same substance
cohesion
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evenly distributed mixture
solution
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a substance made of the joined atoms of two or
more different elements
compound
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