Which one of the following is a causative agent of plague?
Shigella flexner
Bordetella pertussi
Staphylococcus aureus
Yersinia pestis
D.
Yersinia pestis
Plague is bacterial disease caused by Yersinia pestis. It is a Gram-negative, rod-shaped, cocco bacillus, facultative anaerobic bacterium that can infect humans as well as animals. It is transmitted from rodents to humans by the bite of infected fleas.
Shigella flexneri causes Shigellosis. It is a diarrheal disease caused by a group of bacteria called Shigella. It is a Gram- negative facultatively intracellular pathogen responsible for bacillary dysentary.
Bordetella pertussis causes Whooping cough. It is a Gram negative, aerobic, pathogenic.
Staphylococcus aureus can cause range of diseases such as, skin infections, pneumonia, meningitis etc. It is a Gram positive, round shaped bacterium.
What is the full form of MAB?
Man and biosphere
Man and biosphere reserve
Man and biosphere reserve programme
Man and biosphere programme
During entry into the ovum, acrosome of sperm releases
hyaluronidase
alkaline phosphorylase
acid phosphatase
carbonic anhydrase
The 'Red Data Book' records
species diversity of wetlands
list of water pollutants
list of threatened species
rate of population decline
During waste water treatment, trickling filter is used for
primary treatment
secondary aerobic treatment
secondary anaerobic treatment
tertiary treatment
Which one of the following hormones is responsible for uterine contraction during parturition?
Relaxin
Vasopressin
Oxytocin
Prolactin
Relationship between DO and BOD is that they
are directly proportional
are inversely proportional
are not related
always remain equal to each other
Phenomenon involving increase in concentration of non-degradable pollutants from lower to higher trophic levels is called
biomagnification
bioaccumulation
biodegradation
bioinvasion
Antibodies produced by a group of identical B-cells against a single epitope of an antigen is called
polyclonal antibodies
monoclonal antibodies
anti- hapten antibodies
somaclonal antibodies
Which one of the following information is essential to, determine the genetic map distance between two genes located on the same chromosome?
Length of the particular chromosome
Number of genes present in the particular chromosome
Number of nucleotides in the particular chromosome
Percentage of crossing over or recombinant frequency between the two genes
