BIOMOLECULES
2010 MARCH
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)
|
Base |
Nucleoside |
Nucleotide |
|
Adenine |
Adenosine |
Adenylic
acid |
|
Guanine |
a |
Guanylic
acid |
|
b |
Cytidine |
Cytidylic
acid |
|
Thymine |
c |
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.
a.
Which is the optimum temperature for salivary amylase obtained from the
graph? (½)
b.
Why the activity declines below the optimum value? (½)
2013 MARCH
1.
a. Identify the compound (½)
b. Name the bond produced when another biomolecule of the same category combines with this. (½)
c. If a number of such molecules are bonded together, what will be the resultant molecule? (½)
b. Name the bond produced when another biomolecule of the same category combines with this. (½)
c. If a number of such molecules are bonded together, what will be the resultant molecule? (½)
2. Observe the following representation and fill up the blanks
appropriately. (1½)
3. Observe the graph showing the activity of an enzyme influenced by
pH.
a. Name the possible enzyme involved
in this reaction. (½)
b. Mention any other factor which affects this enzyme activity that results a similar pattern of graph. (½)
b. Mention any other factor which affects this enzyme activity that results a similar pattern of graph. (½)
2013 OCTOBER (IMPROVEMENT)
1. Observe the graph and answer the following: (3)
a. Find out the role of enzyme. (1)
b. Mention any two factors that influence the activity of an enzyme and
state their influence. (2)
2014 MARCH
1. Name the chemical bonds formed between the following:
a. Amino acids in a protein molecule. (½)
b. Sugar and phosphate in nucleic acids. (½)
2. Distinguish between cofactor and coenzyme with an example for each.
(2)
2014 AUGUST (IMPROVEMENT)
1. (a) Why are
proteins heteropolymers? (1)
(b) Identify the
protein from the given list of biomacromolecules and write its function.
(Cellulose, Starch, Antibody, Inulin). (1)
(c) Identify the
type of protein structures of A & B. (1)
OR
Symbolic representation of a functional enzyme is given.
b. Name the different types of co-factors. (1)
c. What is the co-factor for enzyme, Carboxypeptidase?
(1)