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23 Cards in this Set
- Front
- Back
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What is an enzyme
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a molecule that speed up a reaction by lowering the activation energy
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What are protiens made of?
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amino acids
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a change in pH or temperature does this to an enzyme
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changes its shape so it no longer works.
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a polypeptide chain is held together by what kind of bonds?
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peptide bonds (kind of covalent bond)
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Glucose is this type of carbohydrate
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monosaccharide
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starch and glycerin store energy and are this type of carbohydrate
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polysaccharide
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Why do animals store extra energy as lipids?
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to insulate their bodies
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What lipids make up the majority of a cells membrane?
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phospholipids
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Why are lipids not good solvents?
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They are non-polar
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What is high specific heat?
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how much energy is required to raise the temp of a substance. (water)
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molecules of water are moving too fast to form hydrogen bonds so they exist in this form of matter..
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gas
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properties of water that result in water being polar
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high surface tension
good solvent expands when freezes |
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Name 3 properties of water and why they are important for life under water
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1. Good solvent – dissolves chemicals necessary for life.
2. High specific heat – keeps Earth’s temperature stable and body temperatures stable 3. Expands when freezes – important for life under water |
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What is a covalent bond?
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a bond in which the electrons between too molecules are shared.
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Two atoms of opposite charge are held together by electrical attraction. What kind of bond is this?
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IONIC BOND
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What is Carbons
Atomic Number Atomic Mass |
Atomic Number: 6
Atomic Mass: 12 |
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Why don't the Nobel gases react?
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They are stable because they have a full outer shell
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All organic molecules have this element in it
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Carbon
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The 4 elements that make up 96% of life
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carbon, hydrogen, nitrogrn, oxygen
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an acid has more ___ ions?
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hydrogen
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a base has more ___ ions
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hydroxide
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What do buffers do?
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They neutralize acids and bases
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What are the 3 organic molecules? Give an example of each, what test indicates their presence, and what function they perform.
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Carbohydrates -
Starch: Indicator is Iodine. Glucose: Indicator is Benedict solution Carbohydrates create energy. Proteins - Building blocks of life Albumin - Indicator is Biurect solution Lipids - Store energy Phospholipids - indicator is Sudan IV |
