Kerala Plus One Zoology Chapter Wise Previous Questions Chapter 4 Biomolecules
Fill in the blanks marked as a, b, c and d. (SAY-2010)
a — guanosine
b — cytosine
c — thymidine
d — Thymidilicacid
Non-protein constituents called cofactors are bound to the enzyme to make the enzyme catalytic activity. (MARCH-2011)
a) Name the protein portion of the enzyme,
b) What happens to the catalytic activity when the cofactor is removed from the enzyme?
c) Mention any two kinds of cofactors with examples.
a) Apo enzyme
b) catalytic activity decreases
c) 1) Prosthetic group. Eg: Hearn
2) Co-enzyme, Eg: NAD, NADP.
The breakdown of biomacromolecules in the duodenum is mentioned below. Fill the blank boxes with correct terms. (SAY-2011)
a) Identify A to D. (SAY-2011)
b) Name the compound obtained by the fusion of one ‘C’ and three ‘D’.
A — Glucose
B — Aminoacid
C — Glycerol
D — Fatty acid (palmitic acid)
Carbohydrate: Sugars: : (SAY-2012)
Amino acids or Peptides.
Prepare an equation for a chemical reaction using the following components. (SAY-2012)
Carbonic anhydrase, carbonic acid, water, carbon dioxide.
Analyse the graph showing the activity of salivary amylase (SAY-2012)
a) Which is the optimum temperature for salivary amylase obtained from the graph.
b) Why the activity declines below the optimum value?
b) Low temperature makes the enzyme inactive.
a) Identify this compound. (MARCH-2013)
b) Name the bond produced when another biomolecule of the same category combines with this.
c) If a number of such molecules are bonded together, what will be the resultant molecule?
a) Glycine – amino acid
b) peptide bond
c) polypeptide or protein
Observe the following representation and fill up the blanks appropriately. (SAY-2013)
a) Secondary metabolite
b) Amino acids
Observe the graph showing the activity of an enzyme influenced by pH. (SAY-2013)
a) Name the possible enzyme involved in this reaction.
b) Where is its site of action?
c) Mention any other factor which affects this enzyme activity that results in a similar pattern of graph.
d) Name another similar enzyme acting on the same substrate.
a) Salivary amylase
b) buccal cavity
c) Temperature and substrate concentration
d) Pancreatic amylase
Observe the graph ad answer the following : (SAY-2013)
a) Find out the role of the enzyme.
b) Mention any two factors that influence the activity of an enzyme and state their influence.
a) Enzyme lower the activation energy and reaction proceeds at rate faster than that of uncatalysed reaction.
b) Enzyme shows highest activity at optimum temperature and PH.
Name the chemical bonds formed between the following : (MARCH-2014)
a) Amino acids in a protein molecule
b) Sugar and phosphate in nucleic acids.
a) Peptide bond
b) Phospho diester or Ester bond
Distinguish between cofactor and coenzyme with an example for each. (MARCH-2014)
Co-factor — Inorganic or metallic ions which form non protein part of an enzyme Eg- Zinc in carboxy pep-tidase
Coenzyme — Non protein organic part of enzyme Eg – FAD/NAD
a) Why are proteins heteropolymers? (SAY-2014)
b) Identify the protein from the given list of biomacromolecules and write its function. (Cellulose, Starch, Antibody, Inulin)
c) Identify the type of protein structures of ‘A’ and ‘B’.
Symbolic representation of a functional enzyme is given below.
a) Write one difference between a co-factor and an Apoenzyme.
b) Name the different types of co-factors.
c) What is the co-factor for the enzyme, Carbox- ypeptidase?
a) Because it is made up of different aminoacids antibody- act against foreign bodies coming into the body
b) A -secondary structure B-Tertiary structure
a) Co-factor—non protein part of an enzyme
Apoenzyme -Protein part of enzyme
b) Three kinds of cofactors are identified: prosthetic
groups, co-enzymes and metal ions
c) zinc is a cofactor for the proteolytic enzyme
Select the wrongly matched pair from the following: (MARCH-2017)
Antibody – sensory reception
Identify protein stuctures. (A) and (b) from the following figure. (MARCH-2015)
a) Secondary structure
b) Tertiary structure
Analyze the graph showing the activity of an enzyme, influenced by temperature (MARCH-2015)
a) What is meant by optimum temperature?
b) Why does the enzyme activity decline at too high temperatures?
a) Enzyme shows its highest activity at a particular temperature called the optimum temperature, b) Low temperature preserves the enzyme in a temporarily inactive state whereas high temperature destroys enzymatic activity because proteins are denatured by heat.
Complete the following sequence with appropriate words. (SAY-2015)
Amino acids: ……………. (a) ………… bond: Proteins
……… (b) ………. : Glycosidic bond: Polysaccharides
a) peptide bond
Metabolites are organic compounds constantly utilized in various metabolic activities in the cells. (MARCH-2016)
a) What are the two types of metabolites in cells?
b) Given an example for each type of metabolite.
a) primarymetabolites and secondary metabolites
b) primarymetabolites-lipid,protein,carbohydrate etc secondary metabolites-alkalloids, terpenoides etc.
Enzymes are biocatalysts which regulate various biochemical reactions. (SAY-2016)
Illustrate the following reactions.
E + S → ES → E + P
E + S → ES → E + P
Enzyme combines with substrate and forms enzyme substrate complex.
Enzyme substrate complex dissociates and forms enzyme and products.
Identify the given biomolecule that comes under the fat. (SAY-2016)
a) Name the biomacromolecule (polymer) in which the peptide bond is present. (SAY-2016)
b) Name the bond present between the phosphate and the hydroxyl group of sugar in nucleic acids.
a) Protein b) phosphodiester bond
Identify the given biomoledules. (MARCH-2017)
A) Amino acid
B) Adenylic acid