Tag: lipids and their function
Questions Related to lipids and their function
Content of unsaturated fatty acid linolenic acid is highest in
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Sunflower oil
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Cotton seed oil
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Groundnut oil
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Coconut oil
Unsaturated fatty acid is those which contain one or more double bond in their fatty acids. Generally, it is found in plants fats. It also lowers blood cholesterol. Linoleic is unsaturated fatty acid containing two double bonds. Sunflower oil contains highest linoleic acid. Thus, the correct answer is A.
Unsaturated fatty acids have
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No double bonds
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High melting point
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One or more double bonds
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Disulphide bonds
Number of fatty acid residues present in one molecule of fat is
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$4$
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$3$
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$2$
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$1$
Fat is stored reserve for the body which provides energy. These are triesters of glycerol. It is obtained from fatty acids and glycerol. It consists of one glycerol molecule and three fatty acid molecules. The carboxyl end of the fatty acid combines with the three -OH groups of the glycerol to form the ester. So, the correct answer is option B.
A fatty acid not synthesised in human body is
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Cholesterol
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Linoleic acid
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Glycerol
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None of the above
The most essential of the fatty acids is
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Arachidonic acid
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Palmitic acid
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Linoleic acid
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Oleic acid
Fatty acids are of two types, the saturated fatty acids that have single bond across the carbon chain and the unsaturated fatty acids that have one or more double bond across the carbon chain. When there are more than one double bonds, they are called the polyunsaturated fatty acids. These are called the essential fatty acids as they cannot be synthesized in the body and must be supplied through the external source. Linoleic acid and linolenic acid are the essential fatty acids.
Which alcohol is present in fats?
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Glycerol
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Butanol
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Ethanol
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Octanol
Hydrolysis of lipids produces
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Glycerine and glycerol
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Fatty acids and trihydric alcohol
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Glycine
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All the above
Unsaturated fatty acids have
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Palmitic acid
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Stearic acid
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Oleic acid
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One or more double bonds
An unsaturated fat is a fat or fatty acid in which there is one or more double bond in the fatty acid chain. A fat molecule is monounsaturated if it contains one double bond, and polyunsaturated if it contains more than one double bond. Where double bonds are formed, hydrogen atoms are eliminated.
An essential fatty acid is
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Palmitic acid
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Arachidonic acid
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Stearic acid
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Arachidic acid
Arachidonic acid is not one of
the essential fatty acids. Rather it is conditionally essential fatty acid
which, becomes essential if its precursor, linoleic acid is deficient thereby
resulting in the inability to convert linoleic acid to arachidonic acid.
However, some mammals lack the ability or have a very limited capacity to
convert linoleic acid to arachidonic acid, making it an essential part of their
diets. So, the correct answer is 'Arachidonic acid'.
Higher animals cannot synthesise a few essential fatty acids; these are typically
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Saturated
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Branched
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Unsaturated
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Cyclic