Sardar Krushinagar Dantiwada Agricultural Uiversity 2010 B.Sc Agriculture for competitive - Question Paper

MULTIPLE CHOICE QUESTIONS

B.Sc Agriculture

(For Competitive Examination)

The genetic material of Viroids consist of

a)      DNA

b)      RNA

c)      Proteins

d)     Both DNA and RNA

Coconut cadang cadang is caused by

a)      Viroids

b)      Prions

c)      Protozoa

d)     Nematodes

Most of the antibiotics are produced by

a)      Actinomycetes

b)      Cyanobacteria

c)      Methanobacterium

d)     Plasmodium

Which of the following is responsible for earthy smell of soil just after rainfall

a)      Actinomycetes

b)      Virus

c)      Bacillus licheniformis

d)      Bacillus subtilis

Capsid is a part of which of the following microorganism

a)      Bacteria

b)      Virus

c)      Algae

d)     Fungi

Azolla shows symbiotic association with

a)      Anabaena

b)      Bacillus

c)      Nostoc

d)      Calothrix

Heterocysts are important in

a)      N-fixation

b)      K-fixation

c)      S-fixation

d)     P-fixation

Heterocysts are present in which of the following microorganisms

a)      Cyanobacteria

b)      Fungus

c)      Actinomycetes

d)      Streptomyces

Mycorrhiza are important in uptake of

a)      Phosphorous

b)      Sulfur

c)      Calcium

d)     Nitrogen

Siderophores are useful in chelating of which of the following minerals

a)      Iron

b)      Magnesium

c)      Phosphorous

d)     Sulfur

Which of the following is absent in bacteria

a)      Cell wall

b)      Cell membrane

c)      Nuclear membrane

d)     Chromosome

Bacteria do not reproduce by

a)      Binary fission

b)      Fragmentation

c)      Asexual reproduction

d)     Sexual reproduction

TMV (Tobacco Mosaic Virus) contains as genetic material

a)      DNA

b)      RNA

c)      Both DNA and RNA

d)     Proteins

Syphilis is caused by

a)      Treponema pallidum

b)      Pseudomonas fluorescence

c)      Bacillus subtilis

d)     Aspergillus flavus

Who discovered the causative agent of malaria

a)      Laveran

b)      Robert Koch

c)      Klebs and Loeffler

d)     Nicolair

The phenomenon of Ice nucleation involves

a)      Virus

b)      Bacteria

c)      Fungus

d)     Protozoa

N-acetyl muramic acid is present in

a)      Cell wall of bacteria

b)      Cell membrane of bacteria

c)      Cell wall of fungus

d)     Cell membrane of fungus

Which of the following is an obligate intracellular parasite

a)      Aspergillus niger

b)      Influenza virus

c)      Nostoc muscorum

d)      Saccharomyces spp.

Scrapie disease of ship is caused by

a)      Viroids

b)      Prions

c)      Mycoplasma

d)     Spiroplasma