BCH 501 BASIC BIOCHEMISTRY Question Paper

UASR/ACR/BCH-501/AQ EXAM/10 MARKS/45 MIN /II SEM 2011-12/2-3-2012

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Q I. Fill in the blank with appropriate word
(0.5x10=5.0)

1. Four most abundant elements in all living organisms are oxygen, hydrogen, carbon, and ____________.
   
   

2. Four most abundant elements in earth crust are oxygen, silicon, iron and ____________.
   
   

3. The plant specific biochemical processes are photosynthesis, starch synthesis and ____________.
   
   

4. The living organisms synthesize simple sugars and amino acids from atmospheric oxygen, carbon dioxide and ____________.
   
   

5. Scientist ____________ showed oxygen is liberated by plants and absorbed by animals.
   
   

6. The specific heat of liquid ammonia is ____________.
   
   

7. The heat of vaporization of water is ____________.
   
   

8. The dielectric constant of water is ____________.
   
   

9. Waxes are esters of ____________ fatty acids and ____________ alcohols.
   
   

10. Oils and fats are ____________ of fatty acids and alcohols.
    
    

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Q II. Write True or False
(0.5x10=5.0)

1. Deoxy ribose contains hydrogen and oxygen in 2:1 ratio.
   
   

2. Trehalose is a reducing sugar.
   
   

3. Naturally occurring glucose and fructose are L-sugars.
   
   

4. Antigens are Peptidoglycon in nature.
   
   

5. Amylopectin is a straight chain polymer of glucose.
   
   

6. Inulin is polymer of ribose.
   
   

7. Raffinose is trisose sugar.
   
   

8. Glycerol is a trihydric alcohol.
   
   

9. Carbohydrates mainly exist in combined forms.
   
   

10. Lipids upon hydrolysis yield chemically related molecules.
    
    

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Q III. Answer the following
(1.0x5=5.0)

1. What are amphipathic molecules?

2. What is a hydrogen bond?

3. Write reactions involved in buffering action of buffers.

4. Write structures of L-Mannose and L-Galactose.

5. What are epimers?