BOT/IV/EC/07 Student's Copy
2 0 1 8
CBCS
4th Semester
BOTANY
FOURTH PAPER
Microbiology, Cytology, Genetics and Evolution
Full Marks 75
Time 3 hours
PART A—OBJECTIVE
Marks 25
The figures in the margin indicate full marks for the questions
SECTION—A
Marks 10
Tick the correct answer in the brackets provided 1×10=10
1. A bacterium having a single flagellum on each of two opposite ends is
called
Monotrichous
Lophotrichous
Amphitrichous
Peritrichous
2. Spherical bacteria which occur in chain is known as
Diplococcus
Streptococcus
Staphylococcus
Pericoccus
/344 1 Contd.
3. The main yeast species responsible for alcoholic fermentation is
Acetobacter cerevisiae
Escherichia coli
Saccharomycetes cerevisiae
Saccharomycetes milleri
4. Biological oxidation of ammonia to nitrate followed by the oxidation of the
nitrite to nitrate is called
ammonification
nitrification
denitrification
nitrate reduction
5. Crossing-over takes place in
leptotene
zygotene
pachytene
diplotene
6. The gene interaction occurring between genes in different locus is called
intragenic interaction
intergenic interaction
duplicate gene interaction
complementary gene interaction
7. DNA synthesis occurs during
G1 phase
G2 phase
S phase
All of the above
8. Chiasmata formation is observed during
pachytene stage
leptotene stage
zygotene stage
diplotene stage
BOT/IV/EC/07/344 2 Contd.
9. The book called Philosophie Zoologique was published by
Darwin
Lamarck
Malthus
Hugo de Vries
10. Theory of 'inheritance of acquired characters' was proposed by
Lamarck
Darwin
Malthus
Hugo de Vries
SECTION—B
Marks 15
Write short notes on the following 3×5=15
1. Transduction
OR
Scope of microbiology
2. Wine fermentation
OR
Microbes in water
3. Duplicate genes
OR
Neo-Mendelism
4. Incomplete dominance
OR
Linkage map
5. Organic evolution
OR
Objections to theory of evolution
BOT/IV/EC/07/344 3 Contd.
PART B—DESCRIPTIVE
Marks 50
The figures in the margin indicate full marks for the questions
1. Give a brief account of genetic recombination in bacteria. 10
OR
Write short notes on the following 5+5=10
Structure of bacteriophage
Lytic cycle in bacteria
2. Describe the role of microorganisms in nitrogen cycle. 10
OR
Give accounts of the following 5+5=10
Antibiotics
Microbes as biofertilizers
3. What is interphase nucleus? Explain the cell cycle. 2+8=10
OR
Briefly describe the following 5+5=10
Lethal gene
Law of segregation
4. Define crossing-over. Write a detailed account of cytological basis of
crossing-over. 3+7=10
OR
Write short notes on the following 5+5=10
Chromosome theory of sex determination
Meiosis
5. Explain the theory of acquired characters. 10
OR
Write short notes on the following 5+5=10
Darwinism
de Vries mutation theory