Biology Multiple Choice Questions and Answers for Different Competitive Exams

MCQ on Biological Classification ( Set 3)

1. Which of the following shows coiled RNA strand and capsomers?
A)Poliovirus
B)Tobacco mosaic virus
C)Measles virus
D)Retrovirus

2. Viruses have
A) DNA enclosed in a protein coat
B)prokaryotic nucleus
C)single chromosome
D)both DNA and RNA

3. Archae bacteria differ from eubacteria in
A)cell membrane structure
B)mode of nutrition
C)cell shape
D)mode of reproduction

4. The genetic material of a viroid is
A)DNA
B)RNA
C)Protein
D)Carbohydrate

5.The smallest organisms which are self-reproducing in free-living state are known as
A)bacteria
B)viruses
C)PPLO
D)Prions

6. Which of the followingly wrongly matched?
A)D J Ivanowski- Microbes smaller than bacteria cause mosaic disease of tobacco
B)W.M Stanely- Crystalloid proteins
C)L Pasteur- Virus means venom or poisonous fluid
D)T.O. Diener- Viroids are found to be a free DNA

7.The organisms which completely lack a cell wall and can live without oxygen are
A)mycoplasmas
B)archaebacteria
C)methanogens
D)thermoacidophiles

8. According to five kingdom systems of classification, which group does blue-green algae belong to?
A)Fungi
B)Monera
C)Plantae
D)Protista

9.  Which of the following characters belongs to the Kingdom Monera?
A)Eukaryotic
B)Heterotrophic
C)Multicellular
D)Presence of cell walls  made of cellulose

10. Five kingdom system of classification suggested by R H Whittaker is not based on
A)presence or absence of a well-defined nucleus
B)mode of reproduction
C)mode of nutrition
D)complexity of body organization

Answer: 
1.B)Tobacco mosaic virus
2. A) DNA enclosed in a protein coat
3. A)cell membrane structure
4. B)RNA
5. C)PPLO
6. D)T.O. Diener- Viroids are found to be a free DNA
7. A)mycoplasmas
8. B)Monera
9. B)Heterotrophic
10. B)mode of reproduction

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