Tag: food and it's constituents
Questions Related to food and it's constituents
Cerebroside is a
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Glycolipid
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Sterol
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Phospholipid
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Steroid
Cerebroside is an important component of muscles and nerve cell membrane. It is also known as galactosylceramide. It is a class of glycolipids which consists of N -acyl sphingosine with glucose or galactose. Its deposition causes Gaucher disease. It is synthesized in endoplasmic reticulum and membranes of Golgi apparatus. It is degraded in the lysosomes. It is also known as galactolipid.
Hydrolysis of lipid yields
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Fats
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Fatty acids and glycerol
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Mannose and glycerol
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Maltose and fatty acid
Most common lipids are triglycerides of glycerol and fatty acids. During digestion of lipids they are broken down into constituent fatty acids and glycerols by the action of lipase enzymes.
$a$ | Fatty acid | $1.$ | Glutamic acid |
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$b$ | Phospholipid | $2.$ | Tryptophan |
$c$ | Aromatic Amino Acid | $3.$ | Lecithin |
$d$ | Acidic Amino Acid | $4.$ | Palmitic acid |
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$a - 1, b - 2, c - 3, d - 4$
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$a - 4, b - 3, c - 2, d - 1$
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$a - 2, b - 3, c - 4, d - 1$
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$a - 3, b - 4, c - 1, d - 2$
a) Palmitic acid is a saturated fatty acid. Its chemical formula is CH$ _3$(CH$ _2$)$ _{14}$COOH. Meat, cheese and diary products are the main source of the palmitic acid. It was first discovered in saponified palm oil. Excess carbohydrate in the body is converted into palmitic acid.
Commonly, candles are prepared from
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Bees wax
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Paraffin wax
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Stearic acid
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Both (b) and (c)
The use of wax used to prepare candles has changed during the past few centuries. Nowadays, standard commercial candles are made from a combination of Paraffin wax and Stearic acid. A small amount of Bee wax may or may not be added in the making.
A product of glycerol and phellonic acid is
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Wax
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Cutin
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Suberin
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Sterol
Suberin is a type of lipid found in the cell wall of plants especially cork cells. It is a mixture of fatty acid material along with glycerol and phellonic acid. It gives rigidity and strength to cell wall in addition to imparting impermeability to cork cells. Waxes are esters of long chain fatty acids with cetyl or mericyl alcohol. They are found in leaf surfaces of plants, bees wax, wool fat of animal furs and ear wax. Cutin is a complex lipid formed by polymerisation of hydroxy fatty acids with or without esterification by alcohols other than glycerol. It is found in the epidermal cell walls of plants and also as a separate layer outer to epidermis. It prevents the water loss due to transpiration.
Among the following edible fishes which one is a marine fish having rich source of omega-3 fatty acids
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Mackerel
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Mystus
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Magur
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Mrigala
The most widely available dietary source of omega-3 fats is oily fish, such as salmon, herring, mackerel, anchovies, menhaden, and sardines. All types of mackerel are higher-fat fish, rich in the healthful polyunsaturated fats known as long-chain omega-3s, which may help boost heart health. So, the correct answer is option A.
During symbiotic biological nitrogen fixation. The recognition of rhizobiahost interaction involves two classes of molecules there are _______________.
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Lectins an lipids
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Lectins and Polysaccharides
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Flavonoids and lipids
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Lectins and Alkaloids
The major driving force for the formation of membrane lipid bilayer
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vander waal forces
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electrostatic force
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hydrophobic interactions
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H-bond
Fats, oils, and steroids are
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Proteins
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Nucleic acids
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Polysaccharides
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Lipids
Lipids are storage compounds, triglycerides serve as reserve energy of the body. These are an important component of cell membranes structure in eukaryotic cells that helps in regulating membrane permeability. They serve as the source for fat-soluble vitamins like A, D, E, K. Example of lipids are fats, oils and steroids.
In a phospholipid bilayer, the lipid molecules are sandwiched between
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hydrophobic heads; hydrophilic tails
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hydrophobic tails; hydrophilic heads
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hydrophilic heads; hydrophilic tails
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hydrophobic tails; hydrophobic heads
So, the correct answer is 'hydrophobic tails; hydrophilic heads'.