Tag: lipids
Questions Related to lipids
In the fluid mosaic membrane model, the phospholipid bilayer
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Is sandwiched between two protein layers
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Is covered by a single protein layer
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Has proteins embedded in it
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Lies on top of a single protein layer
In the fluid mosaic model, the phospholipid bilayer has integrated as well as peripheral proteins embedded in it. The integrated proteins are found on the inside and span across the bilayer, while the peripheral proteins are found at the periphery of the lipid layers.
So the correct answer is 'has proteins embedded in it'.
Function of smooth endoplasmic reticulum is?
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Synthesis of lipid
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Synthesis of minerals
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Synthesis of protein
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None
Its main functions are the synthesis of lipids, steroid hormones, the detoxification of harmful metabolic byproducts and the storage and metabolism of calcium ions within the cell. The smooth ER is distinguished from the other parts of the endoplasmic reticulum by the absence of membrane-bound ribosomes.
CPPP which is the important component of sterol is mainly stood for?
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Cyclopentanoperhydrophenanthrene
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Pentanoperhydrophenanthrene
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Cycloperhydrophenanthrene
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None of the above
CPPP is the abbreviated form of Cyclopentanoperhydrophenanthrene. It is an important component of sterol. Thus the correct answer is option A.
Select the correct option:
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Sterol
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Glycolipid
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Phospholipid
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Sphingolipid
Phospholipids are triglyceride lipids, in which one fatty acid is replaced by phosphoric acid residue often linked to additional nitrogenous group,eg., choline in lecithin.
Steroids are
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Tetraterpenes
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Polyterpenes
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Triterpenes and their derivative
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Phenolic compounds
Steroids are hormonal substances in animals, but they are components of membranes in most organisms. Triterpenes are precursors to steroids in both plants and animals. Steroids are derivatives of triterpenes with 26 or more carbon atoms that have undergone a characteristic type of rearrangement. So, the correct answer is option C.
Two important processes in a cell, which take place outside the membrane bound organelles, are
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Enzyme synthesis and DNA replication
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Nucleotide synthesis and mutation
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Fatty acid synthesis and spindle assembly
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Glycolysis and photophosphorylation
So, the correct answer is 'fatty acid synthesis and spindle assembly'.
Cholesterol belongs to group
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Steroid
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Neutral fats
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Waxes
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Phospholipids
Lipids are insoluble in water because lipids molecules are
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Hydrophilic
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Hydrophobic
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Neutral
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Zwitter ions
Lipids are hydrophobic (water repelling) and non-polar. Non-polar substances, for instance fats and oils cannot be dissolved in water because they have made up of only carbon-carbon and hydrogen-carbon bonds. Only polar solutes dissolve in polar solvents.
Which of these is not a lipid?
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Steroid
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Fat
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Polysaccharide
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Wax
The polysaccharide is a carbohydrate that is formed by the bond formation between various monomers like glucose, fructose etc. Its examples are starch, cellulose, chitin, glycogen, etc.
Jojoba (Simmondsia) possesses
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Triglyceride and wax
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Wax
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Triglyceride
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Sterol