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Matter Matters. Carbs. Lipids. Proteins. Enzymes. 100. 100. 100. 100. 100. 200. 200. 200. 200. 200. 300. 300. 300. 300. 300. 400. 400. 400. 400. 400. 500. 500. 500. 500. 500. - PowerPoint PPT PresentationTRANSCRIPT
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Matter Matters Carbs Lipids Proteins Enzymes
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You look at an oxygen atom under a scanning microscope – what
subatomic particles can you expect to see? What are their respective
charges?
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Protons – (+)Neutrons – (°)Electrons – (-)
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Carbon can form up to how many covalent bonds?
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4
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Of the following, which represents an endothermic reaction? Exothermic?
How do you know?A. B.
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A. Endothermic – less energy after reaction
B. Exothermic – more energy after reaction
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What is the property of water that allows water molecules to bond together and with molecules of
other substances?
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Adhesion; result of polarity
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The following compounds are called?
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Isomers
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You eat a big bowl of rice. The starch in the rice is stored in your
body in which form?
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Glycogen
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The three classes of carbohydrates are?
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MonosaccharidesDisaccharides
Polysaccharides
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What is the general chemical formula for carbohydrates
(ratios)?
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(CH2O)x/ 1:2:1
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List 2 functions of carbohydrates and one example.
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Energy source, storage source and structural materials
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Explain the following reaction
+
+ H2OO
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Condensation reaction – disaccharide formed, water
released
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Plants that live in dry places need to store a lot of water to survive. Because of this they have what
class of lipids covering their surface?
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Waxes
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Butter is an example of what kind of fat? Explain why.
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Saturated – all 4 available electrons bonded to another atom
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What are 2 characteristics of lipids?
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Storage, Insoluble, Protective Tissue
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What is this a picture of and
where can you find it?
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Phospholipid, cell membrane
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You are eating a bag of salt and vinegar chips. You know they have a lot of fat in them but you also know that have that sour vinegary taste.
That taste comes from its pH level. You know from your acid/base lab that vinegar is an acid – this means
what about the concentration of ions?
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Higher amount of H+, lower amount of OH-
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Your body doesn’t go into acidosis (a state of acid shock) when you eat the salt and vinegar chips because…
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buffers
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Proteins are composed of mainly which elements?
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C, H, O, N
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What part of an amino acid determines the physical and
chemical properties of that amino acid?
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R- group or side chain
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If you wanted to test for the presence of organic compounds in your protein shake what kinds of identification tests could you do?
What results would indicate positives?
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Fats: Sudan III – Red Color
Carbs: Iodine – blue/blackBenedict’s – green, orange, red,
yellowProteins: Biuret – purple/violet
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The following structures illustrate which class of protein
structure?
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Secondary
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Enzymes are biological ________
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catalysts
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How do enzymes affect reactions?
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Reduce activation energy; increase rate of reaction
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What is an active site?
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Where substrate binds to enzyme; has folds that form specific shape
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What are some factors that affect enzyme activity? Explain.
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Temperature ; pH
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What is the name of the following model? Explain what is going on.
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Lock and Key/Induced fit model