Biological Classification MCQs | Biological Classification Multiple Choice Questions(MCQs) & Answers

1 Which of the following are found in extreme saline conditions?
A Archaebacteria
B Eubacteria
C Cyanobacteria
D Mycobacteria

Answer: Archaebacteria
2 Which one of the following is wrong for fungi?
A They are eukaryotic
B All fungi possess a purely cellulosic cell wall
C They are heterotrophic
D They are both unicellular and multicellular

Answer: All fungi possess a purely cellulosic cell wall
3 Select the wrong statement.
A The walls of diatoms are easily destructible
B 'Diatomaceous earth' is formed by the cell walls of diatoms
C Diatoms are chief producers in the oceans
D Diatoms are microscopic and float passiveley in water

Answer: The walls of diatoms are easily destructible
4 The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals, include the
A Thermoacidophiles
B Methanogens
C Eubacteria
D Halophiles

Answer: Methanogens
5 Which of the following statements is wrong for viroids?
A They are smaller than viruses
B They cause infections
C Their RNA is of high molecular weight
D They lack a protein coat

Answer: Their RNA is of high molecular weight
6 The most abundant prokaryotes helpful to human in making curd from milk and in production of antibiotics are the ones categorized as
A Cyanobacteria
B Archaebacteria
C Chemosynthetic Autotrophs
D Heterotrophic Bacteria

Answer: Heterotrophic Bacteria
7 The cyanobacteria are also referred to as
A Protists
B Golden Algae
C Slime Moulds
D Blue-Green Algae

Answer: Blue-Green Algae
8 Nuclear membrane is absent in
A Penicillium
B Agaricus
C Volvox
D Nostoc

Answer: Structured interview
9 Maximum nutritional diversity is found in the group
A Fungi
B Animalia
C Monera
D Plantae

Answer: Monera
10 Single-celled eukaryotes are included in
A Protista
B Fungi
C Archaea
D Monera

Answer: Protista
11 Some hyperthermophilic organisms that grow in highly acidic (pH2) habitats belong to the two groups called
A Eubacteria And Archaea
B Cyanobacteria And Diatoms
C Protists And Mosses
D Liverworts And Yeasts

Answer: Eubacteria And Archaea
12 Oxygenic photosynthesis occurs in
A Chromatium
B Oscillatoria
C Rhodospirillum
D Chlorobium

Answer: Oscillatoria
13 T. O. Diener discovered a
A Free Infectious RNA
B Free Infectious DNA
C Infectious Protein
D Bacteriophage

Answer: Free Infectious RNA
14 Modern detergents contain enzyme preparations of
A Acidophiles
B Alkaliphiles
C Thermoacidophiles
D Thermophiles

Answer: Alkaliphiles
15 Which of the following is a flowering plant with nodules containing filamentous nitrogen-fixing microorganism?
A Casuarina equisetifolia
B Crotolaria juncea
C Cycas revoluta
D Cicer arietinum

Answer: Casuarina equisetifolia
16 Ergot of rye is caused by a species of:
A Phytophthora
B Uncinula
C Ustilago
D Claviceps

Answer: Claviceps
17 Two plants can be conclusively said to belong to the same species if they:
A can reproduce freely with each other and form viable seeds
B have more than 90 percent similar genes
C look similar and possess identical secondary metabolites
D have same number of chromosomes

Answer: can reproduce freely with each other and form viable seeds
18 Cell wall is absent in
A Aspergillus
B Funaria
C Mycoplasma
D Nostoc

Answer: Mycoplasma
19 Viruses have
A DNA enclosed in a protein coat
B prokaryotic nucleus
C single chromosome
D Both DNA and RNA

Answer: DNA enclosed in a protein coat
20 Select wrong statement.
A The viroids were discovered by D.J. lvanowski.
B W.M. Stanley showed that viruses could be crystallized
C The term 'contagium vivum fluidum' was coined by M.W. Beijerinek
D Mosaic disease in tobacco and AIDS in human being are caused by viruses

Answer: The viroids were discovered by D.J. lvanowski.

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