Most Important MCAT Topics From Biology Part 1 & Chp. 2 Part 3

Most Important MCAT Topics From Biology Part 1 & Chp. 2 Part 3

WAXES

NOTE:
(I Will Highlight Important Words with different colours"they are imoprtant from MCAT point of view")


(1)-Waxes are widespread as protective coating of Fruits & Leaves.

(2)-Chemically,waxes are mixtures of Long chain of ALKANES (of Odd No. Of carbon atoms Ranging C₂₅-C₃₅) & ALCOHOL,KETONS & ESTERS of long chain FATTY ACIDS.

(3)-Remember Uses Of Waxes Short  - listed Below:

*Protect Plant From Water Loss

* Protect Plant From Abrasive Damage

*Provide Water Barrier For INSCRTS,BIRDS & ANIMALS e.g:Sheep.

PHOSPHOLIPIDS
*Derivatives Of Phosphatidic acid

*Composed of:
     Gylcerol + fatty acid + Phosphoric acid

*N₂ Bases are imp. components of phospholipids.
 e.g: Choline, Serine, ethanolamine etc.

*Wide-Spread IN:
 Bacteria, Animals & Plant cells
(Mostly Associated With Membrane)

MCQS:
 Which Is One Of The Common Phospholipid:

ANSWER:
    PHOSPHOTIDYCHOLINE

NOTE: (Must Remember Figure 2.9 of Punjab Text Book Board Page 26:Fsc Bio Part 1)
*Imp. points From Fig:

/-Phophotidic acid is COMPOSED of:
*glycerol
*2 fatty acids on (C₁ & C₂) of Gylcerol
*1 Phosphoric acid on (C₃)  of Gylcerol



TERPENOIDS

* Made Up Of ISO-PRENOID UNITS.

*ON CONDENSATION,They Give Rise To:
    Rubbers, Carotenoids, Steroids etc.

* They Are Imp. Source Of ENERGY.

*They Provide Insulation, Mechanical Protection.

*They Protect From Water Loss.

        
NOTE:
    REMEMBER ME IN YOUR PRAYERS.