LT-2/ LT-3/ LT-4 No. of Printed Pages : 12 CERTIFICATE PROGRAMME IN LABORATORY TECHNIQUES (CPLT) Term-End Examination December, 2012 01257 LT- 2 : Laboratory Techniques in Biology LT- 3 : Laboratory Techniques in Chemistry LT- 4 : Laboratory Techniques in Physics Time Allowed : 3 Hours Maximum Marks : 150 Note : (i) This question paper contains three parts, one each for LT-2, LT-3 and LT-4 courses. Maximum time allowed for each part is 1 hour. (ii) Students are required to answer all the three parts in three separate answer books. Write your Enrolment number, Course code and Course title clearly on each of the three answer books. (iii) Marks are indicated against each question. LT-2 : Laboratory Techniques in Biology Time : 1 hour Maximum Marks : 50 All questions are compulsory. 1. Attempt all parts of this question. 4 (a) Fill in the blanks : (i) Instrument used to measure the intensity of color of a coloured solution is called (ii) The use of two stains together is called (iii) Arthropods shed their exoskeleton periodically by process of (iv) Group of organisms that can interbreed to produce viable offspring is called (b) State two distinguishing features between each of the following pairs : 4 (i) Acid and Basic dyes (ii) Aquarium and Vivarium LT-2/ LT-3/ LT-4 1 P.T. O.
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LT-2/ LT-3/ LT-4 No. of Printed Pages : 12
CERTIFICATE PROGRAMME IN LABORATORY TECHNIQUES (CPLT)
Term-End Examination December, 2012
01257
LT- 2 : Laboratory Techniques in Biology LT- 3 : Laboratory Techniques in Chemistry LT- 4 : Laboratory Techniques in Physics
Time Allowed : 3 Hours Maximum Marks : 150
Note : (i) This question paper contains three parts, one each for LT-2, LT-3 and LT-4 courses.
Maximum time allowed for each part is 1 hour. (ii) Students are required to answer all the three parts in three separate answer books. Write your
Enrolment number, Course code and Course title clearly on each of the three answer books.
(iii) Marks are indicated against each question.
LT-2 : Laboratory Techniques in Biology Time : 1 hour Maximum Marks : 50
All questions are compulsory.
1. Attempt all parts of this question. 4 (a) Fill in the blanks :
(i) Instrument used to measure the intensity of color of a coloured solution is
called
(ii) The use of two stains together is called
(iii) Arthropods shed their exoskeleton periodically by process of (iv) Group of organisms that can interbreed to produce viable offspring is called
(b) State two distinguishing features between each of the following pairs : 4 (i) Acid and Basic dyes
(ii) Aquarium and Vivarium
LT-2/ LT-3/ LT-4 1 P.T. O.
(c) Mark the following statements as True or False : 4
(i) Earthworms and leeches are hermaphrodite.
(ii) Light of short wavelength is of lower energy than light of long wavelength
(iii) Dehydration of the mount is done by using increasing strength of alcohol
series.
(iv) Resolution is the ability of an optical system to be focused by adjustment of
the lens tube.
(d) Name two chemicals used as preservatives. 1
(e) Name the instrument used for : 2
(i) Section Cutting
(ii) Separation of suspensions
2. Attempt any five parts of this question.
(a) Describe techniques to collect plant and animal specimens. 5
(b) Compare and contrast the operating principle of the compound microscope with
that of transmission electron microscope.
5
(c) Write down the nutritional factors affecting growth of micro organisms. 5
(d) Discuss general features of biology laboratories. 5
(e) What is mounting ? Describe two methods of mounting insects. 5
(f) Explain the steps involved in making a permanent slide. 5
3. Explain the maintenance, preservation and disposal of microbial cultures. 10
OR
With the help of a suitable diagram, describe the working of a distillation unit. 10
LT-2/LT-3/LT-4 2
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