Most Important MCAT Topics From Biology Part 1 & Chp 2

Most Important MCAT Topics From Biology Part 1 & Chp 2

1-IMPORTANCE OF CARBON:-

*IMPORTANT MCQS FROM THIS TOPIC:

MCQS:
              The Bond That is Potential Source Of Chemical Energy For The Cellular Respiration/activities is…
ANSWER:
                 C-H Bond

2-CARBOHYDRATES:-

*General Formula Of Carbohydrates is important:
that is  “C_x(H₂O)_y”
_* Classification Of Carbohydrates Is Important:
Especially,
                 Monosacchrides,Oligosacchrides & Polysacchrides.

Monosacchrides:-
                       Tetroses,Pentoses And Hexoses are most important(examples must remember).
*General Formula Of Monosacchrides is “(CH₂O)”
MCQS
           Glucose  is example of….
ANSWER
            HEXOSE SUGAR

MCQS
          Example Of Pentose Sugar Is…..
ANSWER
                  Ribose Sugar

NOTE:
         Must Remember The Structures Of Ribose,Glucose, and Their Structures in Ring Form as well.

MCQS
            Percentage Of Normal Blood Glucose Level Is……
ANSWER
            0.08%

NOTE: Must Remember The Equation Of Reaction Of Photosynthesis.

MCQS
      10g Of Glucose Contain How Much Kcal Of Solar Energy?
ANSWER
          717.6Kcal

Oligosacchrides:-
*Less Sweet In Taste.
*Less Soluble In Water.
*On Hydrolysis,they give 2-10 monosacchrides.
*Disacchrides(Two Monosachrides e.g:Sucrose)
 *Gycosidic Bond is always between Two Monosacchrides units.

MCQS
         Which Is Reducing Sugar
ANSWER
          Glucose + Fructose(Both Are Reducing Sugars)

NOTE:Must Remember STRUCTURAL FORMULAS and Equation Of Formation Od Disacchridees.”gylcosidic linkage”

POLYSACCHRIDES:-
*Most Complex
*Most Abudant in nature
*Mostle Branched In Shape
*Have No Taste(Tasteless)
*High Molecular weight
*Only Sparingly(Hardly) Soluble in water

Examples:
           Cellulose,Glycogen,Agar,Chitin,Pectin,Dextrin etc.

NOTE
        STARCH,GLYCOGEN,CELLULOSE are very important from Mcat Point Of View.
        Try To Remember Each And Every Line Of These  three Topics, stacrh,glyccogen and cellulose.
         Have Special FOCUS On Cellulose.

*Remember There Colours With Iododine

For Example
*Starch Gives BLUE Colour With IODINE.
*Gylcogen Gives RED Colour With IODINE.
*Cellulose Gives No Colour With IODINE.

MCQS
          Most Important Carbohydrate In Nature Is:
ANSWER
           Cellulose

NOTE
       This Topic Of Carbohydrates is One Of Main Topics in this chapter.
      Try Your Best To Learn By Heart
    

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