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Biology Jeopardy Ch 2 Review Section 1Section 2Section 3Section 4LabsTerms 111111 222222 333333 444444 555555
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A weak attraction between polar molecules is called a ____ bond. hydrogen 2
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Atoms share electrons in a ____ bond. covalent 3
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True or False: Covalent bonds form when two or more atoms share electrons. True 4
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A nucleotide has four parts? True or False False – they have 3 parts 5
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A substance that is composed of only one type of atom is called a(n) Element 6
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Acidic solutions have a pH that is less than 7. 7
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Hydrogen ions, H+, react with hydroxide ions, OH-, to form Water 8
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When placed in the same container, oil and water do not mix because water is polar and oil is nonpolar. 9
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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. 10
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_____ allows a needle to float on the water. Surface tension 11
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A molecule shaped like a spiral staircase (double helix) is typical of deoxyribonucleic acid. 12
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ATP (adenosine triphosphate) stores energy for cells to use in the bonds between its phosphates. 13
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DNA stores heredity information. 14
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The two types of nucleic acids are DNA and RNA. 15
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The shape of a protein is primarily determined by the type and sequence of its amino acids. 16
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Most enzymes are? proteins 17
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Energy needed for metabolism comes from? Foods – lipids, proteins, carbohydrates 18
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____ are biological catalysts. enzymes 19
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The molecule on which an enzyme acts is called a(n) substrate. 20
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Without enzymes, the chemical reactions in your body would occur too slow to support life processes. 21
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Benedict’s solution is used to detect the presence of?. reducing sugars, such as glucose. 22
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Lugol’s iodine solution is used to detect the presence of starch. 23
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Amylase is a digestive enzyme that breaks down starch into cellulose. 24
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Due to the polarity of water, compounds that dissolve best in water contain polar bonds. 25
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Many laundry detergents contain _____, which make removal of stains easier. enzymes 26
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made of only one type of atom element 27
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attraction between different substances adhesion 28
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attraction between molecules of the same substance cohesion 29
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evenly distributed mixture solution 30
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a substance made of the joined atoms of two or more different elements compound 31
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