Biological Classification
Previous Years Questions

MCQ (Single Correct Answer)

Which of the following statements is correct?
Which of the following is correct about viroids?
Which of the following statements is incorrect?
Select the correctly written scientific name of Mango which was first described by Carolus Linnaeus :
Which among the following is not a prokaryote?
Select the wrong statement.
Oxygen is not produced during photosynthesis by
After karyogamy followed by meiosis, spores are produced exogenously in
Ciliates differ from all other protozoans in
Which of the following organisms are known as chief producers in the oceans?
Which of the following are found in extreme saline conditions?
Viroids differ from viruses in having
Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survise w...
DNA replication in bacteria occurs
Which of the following components provides sticky character to the bacterial cell?
Which one of the following is wrong for fungi?
Select the wrong statement.
Methanogens belong to
Chrysophytes, Euglenoids, Dinoflagellates and Slime moulds are included in the Kingdom
Which one of the following statements is wrong?
One of the major components of cell wall of most fungi is
The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals, include the
Which of the following statements is wrong for viroids?
Which one is a wrong statement?
The structures that help some bacteria to attach to rocks and/or host tissues are
In which group of organisms the cell walls form two thin overlapping shells which fit together?
Select the wrong statement.
Pick up the wrong statement.
Choose the wrong statement.
Cell wall is absent in
The imperfect fungi which are decomposers of litter and help in mineral cycling belong to
True nucleus is absent in
Which one of the following matches is correct? .tg {border-collapse:collapse;border-spacing:0;width:100%} .tg td{font-family:Arial, sans-serif;font-...
Five kingdom system of classification suggested by R.H. Whittaker is not based on
Which of the following shows coiled RNA strand and capsomeres?
Archaebacteria differ from eubacteria in
Which structures perform the function of mitochondria in bacteria?
Viruses have
The motile bacteria are able to move by
Anoxygenic photosynthesis is characteristic of
Why is a capsule advantageous to a bacterium?
Which one of the following is true for fungi?
Which of the following are likely to be present in deep sea water?
Pigment containing membranous extensions in some cyanobacteria are
In the five kingdom classification, Chlamydomonas and Chlorella have been included in
Which statement is wrong for viruses?
Maximum nutritional diversity is found in the group
Nuclear membrane is absent in
The cyanobacteria are also referred to as
The most abundant prokaryotes helpful to humans in making curd ftom milk and in production of antibiotics are the ones categorised as
Which one of the following microbes forms symbiotic association with plants and helps them in their nutrition?
Which one single organism or the pair of organisms is correctly assigned to its or their named taxonomic group?
The pathogen Microsporum responsible for ringworm disease in humans belongs to the same kingdom of organisms as that of
Which one of the following also acts as a catalyst in a bacterial cell?
Which one of the following organisms is not an eukaryotic cells?
In eubacteria, a cellular component that resembles eukaryotic cell is
Which one of the following is incorrectly matched?
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 archaebacte...
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? ...
Virus envelope is known as
Single-celled eukaryotes are included in
One of the free-living, anaerobic nitrogen-fixer is
Some hyperthermophilic organisms that grow in highly acidic (pH 2) habitats belong to the two groups
Membrane-bound organelles are absent in
Phylogenetic system of classification is based on
Which one is the wrong pairing for the disease and its causal organism?
Oxygenic photosynthesis occurs in
Which of the following is a symbiotic nitrogen fixer?
T.O. Diener discovered a
Bacterial leaf blight of rice is caused by a species
Thermococcus, Methanococcus and Methanobacterium exemplify
In the light of recent classification of living organisms into three domains of life (bacteria, archaea and eukarya), which one of the following state...
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 abo...
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
Basophilic prokaryotes
There exists a close association between the alga and the fungus within a lichen. The fungus
Which of the following statements is not true for retroviruses?
Phenetic classification of organisms is based on
A free living nitrogen-fixing cyanobacterium which can also symbiotic association with the water ferm Azolla is
Viruses that infect bacteria multiply and cause their lysis, are called
Lichens are well known combination of an alga and a fungus where fungus has
During replication of a bacterial chromosome DNA synthesis starts from a replication origin site and
Phenetic classification of organisms is based on
Chromosomes in a bactertial cell can be 1 $$-$$ 3 in number and
Tobacco mosaic virus is a tubular filament of size
Which one of the following statements about viruses is correct?
Viruses are no more ''alive'' than isolated chromosomes because
In which kingdom would you classify the archaea and nitrogen-fixing organisms, if the five-kingdom system of classification is used?
Which statement is correct for bacterial transduction?
The growth curve of bacterial population in lab is plotted against time. What will be the shape of graph?
In five kingdom system, the main basis of classification is
Some bacteria are able to grow in streptomycin containing medium due to
Which of the following secretes toxins during storage conditions of crop plants?
In bacteria, plasmid is
Which fungal disease spreads by seed and flowers?
Choose the correct sequence of stages of growth curve for bacteria.
Cauliflower mosaic virus conrains
What is true for cyanobacteria ?
What is true for archaebacteria?
Difference in gram positive and gram negative bacteria is due to
Adhesive pad of fungi penetrate the host with the help of
Black rust of wheat is caused by
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