Tag: bio-chemistry
Questions Related to bio-chemistry
Essential fatty acids were discovered by
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Evans and Burr
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Bloor
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Sutherland
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Beevers
Essential fatty acids are those fatty acid which plays an important role in the biological process and they can be metabolized easily. These acts as a fuel rather getting deposited as fat in the body. The human body cannot synthesize essential fatty acids. Alpha-linolenic acid and linoleic acid are the two essential fatty acid. It was discovered by Evans and Burr.
Lanolin or wool fat is a
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Hard fat
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Oil
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Wax
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Sterol
Lanolin is also known as wool fat, wool grease or wool wax. It is secreted by the sebaceous glands of wool-bearing animals. It is obtained by the sheep which has been raised specifically for wool. It helps the sheep to shedd water from their coats and protect them from changing environmental conditions. Wax is a long chain of sterol ester. It is also used in commercial production of lubricants, rust-preventive coatings, shoe polish.
Linoleic is unsaturated fatty acid whose content is highest in
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Cotton oil
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Sunflower oil
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Coconut oil
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Groundnut oil
Unsaturated fats are liquid at room temperature as they have double bonds. The essential fatty acids like alpha-linolenic acid and linoleic acid are unsaturated as they have double bonds. Sunflower oil is a non- volatile oil. It is a mixture of mostly oleic acid (omega-9)-linoleic acid (omega-6). The composition precisely comprises of 59% linoleic acid, oleic acid 30%, stearic acid 6%, and palmitic acid is 5%.
Match the columns:
| $a$ | Biological pigments | $1.$ | Sodium chloride |
|---|---|---|---|
| $b$ | Chemical messengers | $2.$ | Steroids |
| $c$ | Important constituent of blood | $3.$ | Prostaglandins |
| $d$ | Four carbon rings | $4.$ | Terpenes |
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$a - 2, b - 4, c - 3, d - 1$
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$a - 2, b - 1, c - 4, d - 3$
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$a - 3, b - 4, c - 2, d - 1$
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$a - 4, b - 3, c - 1, d - 2$
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$a - 3, b - 4, c - 1, d - 2$
Arachidonic acid gives rise to
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Terpenes
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Prostaglandins
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Gangliosides
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Cerebrosides
A saturated fatty acid is
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Arachidonic acid
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Stearic acid
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Oleic acid
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Linoleic acid
Saturated fatty acids have single bond and are solid at room temperature. Hydrogenation is the process which involves the addition of hydrogen in the presence of nickel, palladium or platinum. On addition of hydrogen, the double bonds of unsaturated fatty acids are reduced to saturated fatty acid. Stearic acid is a saturated fatty acid as it has single carbon bonds. It has eighteen carbon with chemical formula of C$ _{18}$H$ _{36}$O$ _2$. It can be produced by saponification of the triglycerides.
Which one is essential fatty acid?
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Linoleic acid
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Linolenic acid
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Arachidonic acid
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All the above
Arachidonic acid and palmitic acids have how many carbons in each of them.
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16, 16
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16, 20
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20, 16
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18, 16
Arachidonic acid contains 20 carbon. it is a polyunsaturated omega-6 fatty acid found in phospholipid of the membrane of cells liver, brain, and muscles.
A fatty acid is unsaturated if it
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Contains hydrogen
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Contains double bonds
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Contains an acidic group
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Bonds to glycogen
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 two or more double bonds.
Which of the following is not a type of fat?
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Polysaturated fat
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Monounsaturated fat
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Saturated fat
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Polyunsaturated fat
Answer is option A i.e. "Polysaturated"
Fats are one of the main macro-nutrients. Fats serve both structural and metabolic functions. There are four types of fats: saturated, monounsaturated, trans and polyunsaturated.
1) Saturated fats have no double bonds between the carbons in the chain.
2) Monounsaturated fats have one double bonded carbon in the chain
3) Polyunsaturated fats have multiple double bonds.
4) Trans fats are types of unsaturated fats formed by hydrogenation of oils.