Thursday, March 7, 2019

Biomolecules: Previous Year Questions Part 1

BIOMOLECULES



2010 MARCH
1.     Observe the graph:

a.   What is meant by Vmax value?
b.   Why Vmax not exceeded by any further rise in the substrate concentration?
c.    If a chemical substance closely resembling to that of a substrate is introduced into the reaction system, what will be the consequences? Substantiate.
2010 SEPTEMBER (IMPROVEMENT)
1.     Fill in the blanks marked as a, b, c and d. (2)
Base
Nucleoside
Nucleotide
Adenine
Guanine
b
Thymine
Adenosine
a
Cytidine
c
Adenylic acid Guanylic acid
Cytidylic acid
d
2.     Find the odd one from each group. Justify your answer. (1)
a.   Glutamic acid, Lysine, Valine, Collagen
2011 MARCH
1.     Non-protein constituents called cofactors are bound to the enzyme to make the enzyme catalytically active.
a.   Name the protein portion of the enzyme. (½)
b.   What happens to the catalytic activity when the cofactor is removed from the enzyme? (½)
c.    Mention any two kinds of cofactors with examples. (2)
2011 OCTOBER (IMPROVEMENT)
1.     Observe the following diagrams and answer the questions.
                  
    (A)                                                          (B)                                                          (C)   
                             
                                                                          (D)
a.   Identify A to D (2)
b.   Name the compound obtained by the fusion of one ‘C’ and three ‘D’. (1)
2012 MARCH
1.     Observe the molecule given below and answer the following questions.
a.   Identify the molecule (½)
b.   Label 1 and 2. (1)
c.    Mention any three structural details of the molecule shown in the diagram. (1½)
2012 SEPTEMBER (IMPROVEMENT)
1.     Fill in the blanks:
Carbohydrate: sugars                 Proteins: --------------- (1)
2.     Analyze the graph showing the activity of salivary amylase.
C:\Users\USER\Desktop\Image0686.jpg
a.   Which is the optimum temperature for salivary amylase obtained from the graph? (½)
b.   Why the activity declines below the optimum value? (½)

PART 2

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