Bangalore University 2010-1st Sem B.Sc Biotechnology I /e - Question Paper

II Semester B.Sc. Examination, May/June 2010
(Semester Scheme)
BIOTECHNOLOGY- II
Microbiology and Biostatistics

Time: three Hours Max. Marks: 60

Instruction: Part - I and Part - II must be answered in separate ans booklets.

PART – I
(Microbiology)
part – A

I. ans any 4 of the following: (4x2=8)

1) Contributions of Leewenhock

2) Phenols

3) Lambdaphage

4) Acid fast stain

5) Capsule

part – B

II. ans any 2 of the following: (2x6=12)

6) Radiation methods of sterilization.

7) Construction and principles of SEM.

8) Photosynthetic apparatus in bacteria.

part – C

III. ans any 2 of the following: (2x10=20)

9) discuss the characteristic features and reproduction of algae.

10) define the structure of gram positive and gram negative bacterial cell wall.

11) discuss TCA cycle.

12) Write short notes on:

a) Treatment of cholera

b) Transmission of HIV

c) Prevention of TB

d) Tetanus

PART – II
(Biostatistics)

All ques. carry equal marks.Answer any 4 of the following: (4x5=20)

1. obtain median and mode for the subsequent data:

Income 100 150 180 200 230 250
No.of persons 24 26 16 20 6 30



2. A bag contains three red, six white and seven blue coloured flowers. What is the probability that

2 flowers drawn are ?

a) white and blue

b) red

c) red and white or blue

3. compute the mean and standard deviation for the subsequent data:

Marks 0-5 5-10 10-15 15-20 20-25
No.of students 6 10 12 10 08



4. obtain the missing frequency from the subsequent data provided that their A.M. is 7.3

x two six 7 eight 9
f four six 12 nine 8



5. discuss the following:

i) kind I and kind II errors.

ii) Power of a test and level of significance.

6. 6 guinea pigs injected with 0.5 mg of a medication took on the avg. 15.4 seconds to fall

asleep with an unbiased standard deviation 2.2 seconds with 6 other guinea pigs injected with

1.5 mg of the medication took on the avg. 11.2 seconds to fall asleep with an unbiased standard

deviation of 2.6 seconds. Use the 5% level of significance to test the null hypothesis that the

difference in dosage has no effect.


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Earning:   Approval pending.