M.sc (AGPM) I (Semester (CGPA)Examination,2017
AGROCHEMICALS AND PEST MANAGEMENT
Pesticide Residues and Toxicology
Day Date: Tuesday, 18-04-2017 Max. Marks: 70
Time: 02.30 PM to 05.00 PM
N.B. All Question are Compulsory.
All Question carry equal marks.
Solve any two Questions from Section-II
Solve any two Questions from Section-III
Draw neat labeled diagram wherever necessary
Figures to the right indicate full marks
Section- I
Q.1 Choose correct answer from options given below. 14
refers to the accumulation of pesticides in the tissues
of plants and animals many thousand times greater than is
concentration in surrounding medium.
Biodegradation Bioconcentration
Biomagnifications Bioaccumulation
Toxicokinetics of toxic substance involves
Absorption Distribution
Transformation All the above
the repeated exposure of organisms to the
sublethal concentrations of the toxicants for longer duration.
Chronic exposure Acute exposure
Short term exposure None of these
Glutathione is involved in reactions of
biotransformation
Phase-I Phase-II
Oxidation Reduction
In pesticides are transported through plasma
membrane without use of cellular energy.
Passive transport Active transport
Both a and b None of the above
Page 1 of 3
In reaction glucouronide formation takes place.
Enzymatic conjugation Microsomal oxidation
Reduction None of these
forms complex with receptor.
Agonist Antagonist
Xenobiotics Poison
Minimata disease was first recorded in
India China Shrilanka Japan
is the site of cytochrome linked monooxygenases
Mitochondrion Chloroplast
Cytosol Smooth endolplasmic
reticulum
10) Fungicides kill the
Insects Bacteria
Fungi All the above
11) Silicon inhalation causes in human being.
Asbestosis Silicoponia
Silicosis None of these
12) Organo-phosphorus pesticides affect nervous system by
inhibition of enzyme.
Acetylcholine Aspartate amino
transferase
Succinate
dehydrogenase
All of these
13) Albert firstly studied the mechanism of
Xenobiotics.
Biotransformation Bioaccumulation
Bioconcentration All of these
Section- II
Q.2 What are pesticides? Discuss about the entry of pesticides
in target organism.
07
B What is teratogenecity? Explain teratogenic effects of
different teratogens
07
Q.3 Define poison and comment on the symptoms of following
poisons.
07
Arsenic Opium
Discuss the effects of pesticide residues on soil micro
organism.
07
Page 2 of 3
Q.4 Explain the effects of pesticides on human health. 07
Comment on the 'Entry of pesticides in Environment' 07
Section- III
Q.5 What is poison? Write the classification of poison and
comment on the symptoms of any poison you have studied.
05
Discuss the protocol for analysis of pesticide residues in
fruits by gas chromatography
05
What is receptor? Explain any one type of mechanism of
action of receptor.
04
Q.6 What is mutation? Write short note on mutagens 05
What are organic- chlorine pesticides? Discuss in brief their
mechanism of action.
05
Write in brief about 'Classification of poisons'. 04
Q.7 Explain in detail phenomenon of biomagnification with
suitable examples
05
What is teratogenecity? Explain teratogenic effects of any
two teratogens you have studied
05
What are microsomal oxidases? Explain in brief the role of
microsomal oxidases in transformation of toxicants.