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15
×
Explain surface tension
Water molecules are strongly attracted to each other, especially at the surface where they form a tight film that resists external force
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15
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What MOLECULE does lettuce, potatoes, and trees have in common?
Cellulose - makes up cell walls
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15
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Which macromolecule is the "workhorse" of the cell?
Proteins
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15
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What is soluble in water?
Polar, partially polar, or charged substances. Ionic compounds, vitamins, minerals, sugar...
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10
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How is a molecule different from an atom?
A molecule is many atoms bonded together.
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15
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What is the name for the dense, positively charged center of the atom?
The nucleus
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eraser
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gold
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rocket
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lifesaver
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15
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Which MOLECULE separates the watery cell interior from the watery structure outside the cell?
Phospholipid - the bilayer forms a nonpolar barrier around the cell
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15
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Which category of macromolecule aids in digestion?
Proteins - Enzymes digest our food into usable monomers
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20
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Compare AND contrast polar and nonpolar bonds
Both caused by shared electrons. Polar = unequally, nonpolar = equally shared
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10
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How can you remember the structure of a nucleotide?
Pool (phosphate) - House (pentose sugar) - Garage (base)
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boom
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gift
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gift
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banana
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20
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How are nucleic acids related to proteins?
Nucleic acids provide the instructions to create proteins
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25
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Which bond is NONPOLAR? O-H, N-H, C-H, C-O
C-H, we know because lipids are a long chain of C-H bonds and they are nonpolar
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monster
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gold
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rocket
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baam
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10
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What is an atom?
The smallest unit of matter
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