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