Biological Classification

Five kingdom system of classification suggested by R.H. Whittaker is not based on

The motile bacteria are able to move by

Viruses have

Which structures perform the function of mitochondria in bacteria?

Archaebacteria differ from eubacteria in

Which one of the following is true for fungi?

Why is a capsule advantageous to a bacterium?

Which of the following are likely to be present in deep sea water?

Pigment containing membranous extensions in some cyanobacteria are

The most abundant prokaryotes helpful to humans in making curd ftom milk and in production of antibiotics are the ones categorised as

Which one single organism or the pair of organisms is correctly assigned to its or their named taxonomic group?

Which one of the following microbes forms symbiotic association with plants and helps them in their nutrition?

The cyanobacteria are also referred to as

Maximum nutritional diversity is found in the group

Nuclear membrane is absent in

Which statement is wrong for viruses?

In the five kingdom classification, Chlamydomonas and Chlorella have been included in

In eubacteria, a cellular component that resembles eukaryotic cell is

Which one of the following organisms is not an eukaryotic cells?

Which one of the following is incorrectly matched?

Which one of the following also acts as a catalyst in a bacterial cell?

The pathogen Microsporum responsible for ringworm disease in humans belongs to the same kingdom of organisms as that of

Some hyperthermophilic organisms that grow in highly acidic (pH 2) habitats belong to the two groups

Membrane-bound organelles are absent in

Virus envelope is known as

Single-celled eukaryotes are included in

One of the free-living, anaerobic nitrogen-fixer is

Given below is the diagram of a bacteriophage.
In which one of the options all the four parts
A, B, C and D are correct?

Black (stem) rust of wheat is caused by

Select the correct combination of the statements (i-iv) regarding the characteristics of certain organisms.
(i)  Methanogens are archaebacteria which produce methane in marshy areas.
(ii)  Nostoc is a filamentous blue-green alga which fixe...

Oxygenic photosynthesis occurs in

Which one is the wrong pairing for the disease and its causal organism?

T.O. Diener discovered a

Which of the following is a symbiotic nitrogen fixer?

Phylogenetic system of classification is based on

In the light of recent classification of living organisms into three domains of life (bacteria, archaea and eukarya), which one of the following statements in true about archaea?

Bacterial leaf blight of rice is caused by a species

Thermococcus, Methanococcus and Methanobacterium exemplify

Which one of the following statements about mycoplasma is wrong?

Which one of the following is a slime mould?

Which pair of the following belongs to basidiomycetes?

Curing of tea leaves is brought about by the activity of

Which of the following environmental conditions are essential for optimum growth of Mucor on a piece of bread?
A.   Temperature of about 25o C
B.   Temperature of about 5o C
C.   Relative humidity of about 5%
D.   Relative humidity of abou...

There exists a close association between the alga and the fungus within a lichen. The fungus

Basophilic prokaryotes

All of the following statements concerning the actinomycetous filamentous soil bacterium Frankia are correct except that Frankia

For retting of jute the fermenting microbe used is

A free living nitrogen-fixing cyanobacterium which can also symbiotic association with the water ferm Azolla is

Lichens are well known combination of an alga and a fungus where fungus has

Viruses that infect bacteria multiply and cause their lysis, are called