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Lecithin is a...

Lecithin is a

A

Fatty acid

B

Phospholipid with choline attached to phosphate group

C

Cholesterol

D

fat

Text Solution

Verified by Experts

The correct Answer is:
B
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Read the following statements about respiratory system of humans : I. Type II alveoli help in secretion of a chemical surfactant called lecithin , which decreases the surface tension around alveoli. II. The diffusion membrane for exchange of gases is made up of three major cellular layers. III. Binding of oxygen with hemoglobin is primarily related to the partial pressure of O_2 . IV. Every 100 ml of oxygenated blood can deliver around 5 ml CO_2 to the tissues under normal physiological conditions. How many statement is /are correct from the above ?

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[A] : In the embryos liver is haemopoietic, it produces red blood corpuscles (R803). The breakdown products of haemoglobin of de- stroyed RBCs are converted into bile pigment to be eliminated with faeces. [R]: The main function of liver is secretion of bile, which has bile pigments, cholesterol and lecithin.

CENGAGE BIOLOGY-BIOMOLECULES-ARCHIVES
  1. Lecithin is a

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  2. About 98 percent of the mass of every living organism is compos...

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  3. A competive inhibitor of succinic dehydrogenase is :

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  4. Carrier ions like Na^(+) facilitate the absorption of substance like

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  5. three of the following statements about enzymes are correct, whic...

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  6. Figure 9.37 shows the conversion of a substrate into product by an...

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  7. the curve given below shows wnzymatic acitvity with relation ...

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  8. which one of the following structural formula of two organic com...

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  9. Given in fig .9.38 is the diagrammatic repesentattion of one of...

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  10. which one out of A-D given below corectly represents the structu...

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  11. which one is the most abundent protein in the animal world ?

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  12. which one of the following biomolecules is corrextly characterize...

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  13. A phosphoglyceride is always made up of

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  14. the essential chemical components of many enzymes are

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  15. the transiton state structure of the substrate formed during and...

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  16. the most abundant intracellular cation is

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  17. Macromolecule chitin is a

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  18. which one of the following is a non-reducing carbohydrate?

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  19. Select the option which is not correct with respect to enzyme action

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  20. which one of the following statements is incorrect ?

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  21. the chitinous exoskeleton of arthropods is formed by the polymeri...

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