M.Sc. (Zoology) (Semester-IV) (CBCS) Examination, 2017
ENVIRONMENTAL BIOLOGY TOXICOLOGY
Day Date: Monday, 24-04-2017 Max. Marks: 70
Time: 02.30 PM to 05.00 PM
Instructions Q.1, 2 6 are compulsory.
Answer any two questions from Q.3, 5.
Q.1 Rewrite the following sentences by choosing the most
correct alternative given below
14
…………is the study of toxins in the restricted sense I.e.
poisons produced by Micro-organisms, viz., bacteria and
viruses.
Toxinology Biochemical toxicology E
Industrial Toxicology System Toxicology
Radioactive substances that emit particles are
referred to as "….....".
External emitters Internal emitters E
Intraemitters Intermediate emitters
Which is the narcotis……………..
Opium Hemp E
Alcohol Strychin
……..is in the form of short wave length high energy radiation
similar to x-rays.
Electromagnetic Radiation
Corpuscular radiation
Non-ionizing radiation
Anthropogenic radiation
...... is environmental carcinogens.
Methyl chloride Phenyl in E
Car bromide Lithium
DDT permissible limit in freshwater is…….


E


….. Poisons destroy all tissues with which they come in
contact by chemical actions.
Page 2 of 2
Corrosives Irritants E
Neurotics Cardiac
Q2 Long answer type question: 14
Define toxicology and illustrate its various branches.
Q3 Answer the following: 14
Soil pollution
Mechanism of action of ionizing radiation
Q4 Explain the following 14
Minimart disease
Nitrogen cycle
Management of poly house
Q5 Explain in short: 14
Define organophosphate and give its example
Illustrate the mechanism of action of teratogens
Q6 Write short notes on any four of the following: 14
Food contaminant
Rain water harvesting
Conservation of natural resources
Litter and plastic management
Kinds of aquatic ecosystem
Toxic effects