Pretend you are a teacher preparing a quiz for the text I will provide. 
            Each quiz question should follow the format below. 
            Ensure that you carefully recheck the questions and answers for accuracy. 
            The output should be a ready-to-use list of dictionaries for the Python eval function:

            [

                    "question": "WRITE THE QUESTION HERE",
                    "options": ["A) OPTION_1", "B) OPTION_2", "C) OPTION_3", "D) OPTION_4"],
                    "answer": INDEX_OF_CORRECT_ANSWER_IN_OPTIONS_LIST,
                    "explanation": "EXPLAIN WHY THE ANSWER IS CORRECT"

            ]

            Text:
            ly added between the terminal  CH3 — and —
COOH groups.
Fatty acids in biological systems usually  contain an even 
number of carbon atoms,  typically between 14 and 24. The 16-
and  18-carbon fatty acids are most common.
The hydrocarbon chain is almost invariably  unbranched in animal 
fatty acids. A few  branched-chain fatty acids have also been  
isolated from both plant and animal sources.
28
3. Derived Lipid
28 
12
Number of C  
atoms
Common Name
Systemic Name
Formula
2
Acetic acid
Ethanoic acid
CH3COOH
4
Butyric acid
Butanoic acid
CH3(CH2)2COOH
6
Caproic acid
Hexanoic acid
CH3(CH2)4COOH
8
Caprylic acid
Octanoic acid
CH3(CH2)6COOH
10
Capric acid
Decanoic acid
CH3(CH2)8COOH
12
Lauric acid
Dodecanoic acid
CH3(CH2)10COOH
14
Myristic acid
Tetradecanoic  
acid
CH3(CH2)12COOH
16
Palmitic acid
Hexadecanoic
acid
CH3(CH2)14COOH
18
Stearic acid
Octadecanoic  
acid
CH3(CH2)16COOH
20
Arachidic acid
Eicosanoic acid
CH3(CH2)18COOH
22
Behenic acid
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 )
COOH
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2 20
3. Derived Lipid
29 
Unsaturated fatty acids may further be divided as  follows-
(1)Monounsaturated (monoethenoid, monoenoic) acids,  containing 
one double bond.
(2) Polyunsaturated (polyethenoid, polyenoic) acids,
containing two or more double bonds.
The configuration of the double bonds in most  unsaturated 
fatty acids is cis.
The double bonds in polyunsaturated fatty acids are  separated by 
at least one methylene group.
Biochemistry for medics
6/29/2012
30
3. Derived Lipid
30 
3. Derived Lipid
31 
Polyunsaturated fatty acids such as Linoleic and  
Linolenic acids are essential for normal life  functions. 
They are therefore characterized as  essential fatty acids.
Arachidonic acid is considered as semi essential  fatty acid 
since it can be synthesized from  Linoleic acid .
Essential polyunsaturated fatty acids can be  classified as 
belonging to one of two "families",  the omega-6 family 
or the omega-3 family.
Fatty acids belonging to these two families  differ not only 
in their chemistry, but also in  their natural occurrence and 
biological functions.
3. Derived Lipid
32 
1.
They are useful in the treatment of atherosclerosis 
(transport & decrease blood cholesterol & TG).
2.
The hormones are synthesized from them.
3.
Enter in structure of all cellular & subcellular membranes  & 
transport plasma phospholipids.
4.
Essential for skin integrity, normal growth & reproduction.
5.
Play important role in blood clotting (intrinsic factor).
6.
Important in preventing & treating fatty liver.
7.
Important role in health of the retina & vision.
8.
Can be oxidized for energy production.
Function of Essential Fatty Acids
3. Derived Lipid
33 
Steroids constitute an important class  of 
biological compounds.
Usually found in association with fat.
They’re derivatives of cholesterol that is formed of
steroid ring or nucleus (C17).
Biologically important groups contain this ring, are:
1)
Sterols
2

            Quiz: