Biology Chapter 5: Lipids

23 cards

Lipids


 
  
Created Aug 30, 2011
by
sophiamunoz

 

 
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1
lipids
 
- the one class of biological molecules that does not include/form true polymers- generally...
2
the hydrophobic behavior of lipids is based on what? 
 
their molecular structure
3
other characteristics of lipids include what?
 
- consist mostly of hydrocarbon regions- varied in form and function- include waxes and certain...
4
fats 
 
- not smaller molecules, large molecules assembled from smaller molecules by dehydration reactions-...
5
glycerol
 
a 3 carbon alcohol with a hydroxyl group attached to each carbon
6
fatty acids
 
- a fatty acid has a carboxy attached to a carbon skeleton- contain a long carbon skeleton,...
7
the carbon at the end of a fatty acid's carbon skeleton is part of what?
 
a carboxyl group which is the functional group that gives the molecules the name fatty acid
8
the rest of the carbon skeleton is composed of what?
 
hydrocarbon chain
9
what is the reason why fats are hydrophobic?
 
- the relatively non polar C--H bonds in the hydrocarbon chains of fatty acids- fats separate...
10
in making fat, how many fatty acid molecules are each joined to glycerol by an ester linkage?
 
- three- a bond b/w a hydroxyl group and a carboxyl group
11
triacylglycerol
 
- resulting fat of a bond b/w a hydroxyl group and a carboxyl group- consist of 3 fatty acids...
12
what are the similarities and differences in the fatty acids in a fat?
 
- they can  be the same - or they can be two or three different kinds
13
saturated and unsaturated fats
 
terms refer to the structure of the hydrocarbon chains in the fatty acids
14
saturated fatty acid
 
- if there are no double bonds between carbon atoms composing in a chain, then as many hydrogen...
15
unsaturated fatty acid
 
- has one or more double bonds- with one fewer hydrogen atom on each double-bonded carbon-...
16
most animals fats are saturated or unsaturated?
 
- saturated- the hydrocarbon chains of their fatty acids, the "tails" of the fat molecules,...
17
saturated (animal) fats
 
- solid at room temperature- include lard and butter
18
unsaturated (plant and fish) fats
 
- liquid at room temperature- built of one or more unsaturated fatty acids- referred to as...
19
trans fats
 
- may contribute more than saturated fats atherosclerosis- especially common in baked goods...
20
unsaturated fatty acids must be supplied in the human body because?
 
- they cannot be synthesized in the body- include omega-3 fatty acids, which are required for...
21
what is the major function of fats?
 
- energy storage- the hydrocarbon chains in fat are similar to gasoline molecules and just...
22
phospholipids
 
- two fatty acids and a phosphate-  the two fatty acids are hydrophobic, the...
23
the structure of a phospholipid is based on what?
 
differences in the two fatty acids and in the groups attached to the phosphate group of the...


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