Sardar Krushinagar Dantiwada Agricultural Uiversity 2010 B.Sc Agriculture for competitive - exam paper

MULTIPLE CHOICE QUESTIONS

B.Sc Agriculture

(For Competitive Examination)

Phycology deals with the study of

a)      Algae

b)      Fungi

c)      Protozoa

d)      Mycoplasma

Which of the following is of prokaryotic origin

a)      Blue-Green algae

b)      Brown algae

c)      Green algae

d)     Red algae

Blue-green algae belong to a group of microbes called

a)      Red algae

b)      Green algae

c)      Brown algae

d)      Cyanobacteria

Nitrification refers to conversion of ammonia to

a)      Nitric oxide

b)      Nitrous oxide

c)       Nitrogen gas

d)      Nitrate

Mycorrhizae are symbiotic association between Fungi and

a)      Fungi

b)      Bacteria

c)      Plant leaves

d)     Plant roots

Bacterial soft rot of fruit and vegetables is caused by

a)      Erwinia carotovora

b)      Salmonella

c)      Proteus vulgaris

d)      Leuconostoc

The chemical sodium propionate is generally used as a inhibitor of

a)      Bacteria

b)      Mold

c)      Virus

d)     Algae

Which of the following is an anaerobic nitrogen fixing bacteria

a)      Azotobacter

b)      Salmonella

c)      Derxia

d)      Clostridium

Which of the following is a symbiotic nitrogen fixing microorganism

a)      Frankia

b)      Klebsiella

c)      Desulphovibrio

d)      Clostridium

Which of the following is not a entomopathogenic fungus

a)      Beauveria

b)      Verticillium

c)      Hirsutella

d)      Penicillium

Biogas contains highest amount of which of the following gases

a)      Methane

b)      Oxygen

c)      Carbon dioxide

d)     Hydrogen

Which of the following microorganisms causes Typhus fever

a)      Rickettsia

b)      Spiroplasma

c)      Mycoplasma

d)     Protozoa

Which of the following is an unicellular fungus

a)      Saccharomyces

b)      Trichoderma

c)      Glomus

d)      Gigaspora

Which of the following genetic recombination involves uptake of naked DNA

a)      Transformation

b)      Transduction

c)      Conjugation

d)     Transfection

Which of the following organism convert ammonia to nitrite

a)      Nitrosomonas

b)      Nitrobacter

c)      Azospirillum

d)      Micrococcus

Which of the following organism convert nitrite to nitrate

a)      Nitrobacter

b)      Pseudomonas

c)      Clostridium

d)     Bacillus

Which of the following microorganisms brings about denitrification

a)      Thiobacillus

b)      Bacillus

c)      Aspergillus

d)      Clostridium

Bollworm resistant cotton varieties contains gene from which microorganism

a)      Bacteria

b)      Fungi

c)      Protozoa

d)     Virus

Which of the following is called as extra-chromosomal genetic material

a)      Plasmid

b)      Gene

c)      Genotype

d)     Phenotype

The term plasmid was introduced by

a)      Lederberg

b)      Tatum

c)      Beadle

d)     Kornberg