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Biological Classification Viruses, Viroids, Prions And Kingdome Monera MCQ
Quiz 11
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Q.1
Biosystematics aims at … .. [ CBSE 2003]
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a) Classification of organisms based on broad morphological characters
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b) Delimiting various taxa of organisms and establishing their relationships
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c) Classification of organisms based on their evolutionary history and establishing their phylogeny on the totality of various parameters from all fields of study
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d) Identification and arrangement of organisms on the basis of their cytological character
Explanation
Answer : (c)
Q.2
The main function of elementary bodies in Mycoplasma/some primitive bacteria is … [ AMU 2002]
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a) Reproduction
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b) Respiration
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c) Secretion
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d) Food storage
Explanation
Answer : (a)
Q.3
Bacteria were discovered by … .. [ BHU 1993]
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a) Robert Koch
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b) Robert Hooke
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c) A.V. Leeuwenhoek
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d) Louis Pasteur
Explanation
Answer : (c)
Q.4
Single stranded DNA occurs as a genetic material in virus … .. [ AIIMS 1992 ]
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a) T2
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b) T
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c) Φ × 174
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d) Lambda
Explanation
Answer : (c)
Q.5
Huxley is father of … .. [ MPPMT 2007]
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a) Artificial taxonomy
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b) Adansonian taxonomy
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c) Classical taxonomy
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d) Neotaxonomy
Explanation
Answer : (d)
Q.6
Which one inhibits protein synthesis by binding to 50S ribosome? [ Odisha 2005]
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a) Tetracycline
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b) Streptomycin
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c) Erythromycin
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d) Penicillin
Explanation
Answer : (c)
Q.7
What is true about viruses ? [ CET Chd 2002]
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a) They can be crystallized and stored for several years
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b) Virus so not occur as parasites in living cells
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c) They can be cultured on artificial media
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d) They are devoid of genetic material of their own
Explanation
Answer : (a)
Q.8
In prokaryotes, mitochondria are absent. Krebs cycle occurs over ..[ Manipur 2009]
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a) Cytoplasm
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b) Nucleoid
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c) Ribosome
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d) Plasma membrane
Explanation
A prokaryotic cell like bacteria is typically devoid of membrane bound cell organelles. In such cells, biochemical activities like production of energy through Krebs cycle occurs on mesosomes. Mesosomes are complex infoldings of bacterial plasma membrane which increase biosynthetic area in a bacterial cell which is otherwise devoid of cell organelles. Answer : (c)
Q.9
Enzyme needed for production of DNA from RNA template in certain viruses is … .. [ AMU 2000]
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a) RNA polymerase
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b) Reverse transcriptase
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c) DNA helicase
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d) DNA polymerase
Explanation
Answer : (b)
Q.10
Which of the following process results in the formation of clone of bacteria
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a) Binary fission
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b) Conjugation
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c) Transduction
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d) Transformation
Explanation
Answer : (a)
Q.11
Five kingdom classification of living organisms was proposed by … .. [ JKCMEE 2010]
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a) Engler and Prantl
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b) Bentham and Hooker
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c) Whittaker
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d) Hutchinson
Explanation
Answer : (c)
Q.12
A number of organic compounds can be decomposed by .. .. [ CBSE 1995]
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a) Pseudomonas
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b) Mycoplasma
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c) Chemolithotrophs
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d) Azotobacter
Explanation
Answer : (a)
Q.13
Bacteria that uses chemical energy to fix CO2 are … [ Odisha 2010]
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a) Photoautotrophs
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b) Heterotrophs
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c) Chemoautotrophs
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d) None of the above
Explanation
Answer : (c)
Q.14
Five kingdom classification of living organisms was proposed by … .. [ AFMC 1990 ]
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a) De Bary
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b) Lister
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c) Pasteur
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d) Koch
Explanation
Answer : (c)
Q.15
A taxon having cytoplasm, DNA, RNA but no cell wall is … .. [ MPPMT 1995]
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a) Virus
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b) Bacterium
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c) Mycoplasma
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d) Cyanobacterium
Explanation
Answer : (c)
Q.16
Which is wrong about mycoplasma … [ CBSE 2007]
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a) They are called PPLO
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b) They are pleomorphic
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c) They are sensitive to penicillin
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d) They cause diseases in plants
Explanation
Answer : (c)
Q.17
The one which does not loses its identity even after crystallization is … .. [ DPMT 2002 ]
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a) Virus
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b) Bacterium
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c) Microbe
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d) Protistan
Explanation
Answer : (a)
Q.18
Teichoic acid is found in … [ CPMT2009]
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a) Cyanobacteria
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b) Mycoplasma
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c) Gram (+ve) bacteria
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d) Gram(-ve) bacteria
Explanation
Answer : (c)
Q.19
Assertion: Cyanobacteria are photosynthetic blue-green algae with prokaryotic structure. Reason: They are green due to presence of chloroplasts. [ Har. PMT 2000 ]
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a) If both the assertion and reason are true and reason explains the assertion.
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b) If both the assertion and reason are true but reason does not explain the assertion
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c) If assertion is true but reason is false
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d) If assertion is false but reason is true.
Explanation
Answer : (c)
Q.20
Which of the following is function of nitrifying bacteria …[Odisha 2010]
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a) Oxidise NH3 to NO3’
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b) Oxidise NH3 to NH4+
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c) Convert NO3’ to NH3
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d) Convert NO3’ to N2
Explanation
Answer : (a)
Q.21
Who gave phylogenetic classification of plant kingdom of Flora Armenia ? … [ PbPMT 2007]
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a) Benson
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b) Cronquist
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c) Takhtajan
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d) Hutchinson
Explanation
Armen Takhtajan is among the greatest authorities in the world on the evolution of plants. This book culminates almost sixty years of the scientist's research of the origin and classification of the flowering plants. It presents a continuation of Dr. Takhtajan’s earlier publications including "Systema Magnoliophytorum" (1987), (in Russian), and "Diversity and Classification of Flowering Plants" (1997), (in English) Answer : (c)
Q.22
Crown Gall is due to … .. [ BHU 1995 ]
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a) Agrobacterium
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b) Mycobacterium
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c) Clostridium
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d) Erwinia
Explanation
Answer : (a)
Q.23
Nostoc fixes nitrogen in the symbiotic association of the following Alnus Gunnera Anthoceros Casuarina. The correct combination is ….
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a) 1 and 2
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b) 1 and 3
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c) 1 and 4
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d) 2 and 3
Explanation
Answer : (d)
Q.24
Pili are employed by bacteria for … .. [ RPMT 1990]
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a) Locomotion
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b) Sexual contact
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c) Asexual reproduction
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d) Location of prey
Explanation
A pili are thin, rigid fiber made of protein that protrudes from the cell surface. The primary function of pili are to attach a bacterial cell to specific surfaces or to other cells. Bacteria use adherence fimbriae (pili) to overcome the body's defense mechanism and cause disease. Pili are small hairs that enable some pathogens to attach and adhere easily to cell surface particularly mucous membranes. Answer : (d)
Q.25
Blue-green alga that causes red bloom is … .. [ BHU 1996]
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a) Anabaena
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b) Gloeocapsa
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c) Trichodesmium
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d) Nostoc
Explanation
Answer : (c)
Q.26
Bacteria and other monerans do not possess … .. [ CPMT 1991]
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a) Ribosomes
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b) Mitochondria
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c) Aureomycin
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d) Streptomycin
Explanation
Bacteria and other monerans (Prokaryotes) do not possess membrane bound organelles, like, mitochondria, chloroplast, Endoplasmic reticulum, Golgi bodies, lysosomes and micro-bodies. Explanation provided by S. Gokhulavasan Answer : (b)
Q.27
Viroids have … .. [ AIIMS 2003 ]
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a) Single stranded RNA not enclosed by protein coat
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b) Single stranded DNA not enclosed by protein coat
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c) Double stranded DNA enclosed by protein coat
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d) Double stranded RNA enclosed by protein coat
Explanation
Answer : (a)
Q.28
Oxygenic photosynthesis occurs in … [ CBSE 2009]
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a) Chlorobium
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b) Chromatium
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c) Oscillatoria
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d) Rhodospirillum
Explanation
Answer : (c)
Q.29
Number of capsomeres in TMV is … [ KCET 2000 ]
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a) 3120
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b) 2130
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c) 1230
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d) 231
Explanation
Answer : (b)
Q.30
Temperature tolerance of thermal blue-green algae is due to … .. [ CBSE 1994]
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a) Cell wall structure
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b) Cell organization
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c) Mitochondrial structure
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d) Homopolar bonds in their proteins
Explanation
Answer : (d)
Q.31
Which one is useful in prokaryotic replication? … [ Har.PMT 2001]
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a) Mesosome
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b) Plasmid
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c) Ribosome
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d) Mitochondrion
Explanation
Answer : (a)
Q.32
Endospores develop in .. .. [ BHU 2000]
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a) Mucor and Bacillus
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b) Saccharomyces and Clostridium
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c) Monococcus and Clostridium
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d) Bacillus and Clostridium
Explanation
Answer : (d)
Q.33
Viruses which infect bacteria, multiply and causes their lysis are … .. [ CBSE 2004]
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a) Lysozymes
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b) Lipolytic
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c) Lysogenic
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d) Lytic
Explanation
Answer : (d)
Q.34
The genetic material of viroid is … [ JKCET 2012]
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a) DNA
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b) RNA
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c) Protein
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d) Carbohydrate
Explanation
Answer : (b)
Q.35
Reverse transcriptase is … .. [ CBSE 1994]
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a) RNA dependent RNA polymerase
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b) DNA dependent RNA polymerase
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c) DNA dependent DNA polymerase
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d) RNA dependent DNA polymerase
Explanation
Answer : (d)
Q.36
Respiratory enzymes of aerobic bacteria are mainly located in … [ kerala 2001]
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a) Mitochondria
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b) Chondrioids
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c) Sphaerosomes
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d) Phagosomes
Explanation
Answer : (b)
Q.37
Consider the following statements about features of kingdoms 1) In animalia, the mode of nutrition is autotrophicIn monera, the nuclear membrane is presentIn protista, the cell type is prokaryoticIn plantae, the cell wall is present Of the above statements
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a) 1 alone is correct
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b) 2 alone is correct
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c) 3 alone is correct
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d) 4 alone is correct
Explanation
Answer : (d)
Q.38
Virion is … … [ Odisha 2009]
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a) Virus without protein coat
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b) Enucleated virus
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c) Prion
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d) Virus
Explanation
Answer : (d)
Q.39
Sambar lake is found in …. [ kerala 2000]
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a) Gujarat
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b) Andhra Pradesh
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c) Madhya Pradesh
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d) Rajasthan
Explanation
The Sambhar Salt Lake, India's largest inland salt lake, is located 80 km southwest of the city of Jaipur and 64 km northeast of Ajmer, Rajasthan. Answer : (b)
Q.40
During replication in bacteria DNA is anchored to … [ MPPMT 2007]
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a) Chromosome
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b) Ribosome
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c) Nucleolus
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d) Mesosome
Explanation
Answer : (d)
Q.41
Photosynthetic bacteria include .. .. [ BHU 1990]
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a) Nitrobacter and Nitrosomonas
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b) Chlorobium and Rhodospirillum
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c) Streptococcus and Staphylococcus
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d) Chlorobium and Clostridium
Explanation
Answer : (b)
Q.42
Bacteria lack alternation of generations because there is … .. [ AMU 2002]
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a) Neither syngamy nor reduction division
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b) Distinct chromosomes are absent
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c) No conjugation
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d) No exchange of genetic material;
Explanation
Answer : (a)
Q.43
Plasmid is … …. [ AIIMS 1990 ]
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a) Small extrachromosomal circular self replicating DNA that can carry genes into host organism
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b) Bacteriophage
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c) DNA found in mitochondria
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d) DNA incorporated in bacterial chromosome
Explanation
Answer : (a)
Q.44
Nitrosomonas changes … .. [ MPPMT1995]
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a) Nitrite to nitrate
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b) Nitrogen to ammonia
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c) Ammonia to nitrogen
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d) Ammonia to nitrite
Explanation
Answer : (d)
Q.45
Yersinia pestis causes … .. [ CBSE 1995]
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a) Syphilis
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b) Leprosy
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c) Whooping cough
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d) Plague
Explanation
Answer : (d)
Q.46
In cyanobacteria, reproduction is … .. [ BHU 1993]
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a) Vegetative
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b) Asexual and vegetative
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c) Asexual and sexual
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d) Sexual
Explanation
Answer : (b)
Q.47
Monerans comprise … [ Har PMT1994]
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a) Bacteria
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b) Nitrogen fixing organisms
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c) Cyanophyceae
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d) All the above
Explanation
Answer : (d)
Q.48
Nitrifying bacteria are … .. [ AMU 1998]
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a) Photoautotrophic
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b) Chemosynthetic
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c) Saprophytic
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d) Parasitic
Explanation
Answer : (b)
Q.49
In bacteria the respiratory enzyme are located on … .. [ AIIMS 1991]
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a) Plasmid
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b) Episome
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c) Mesosome
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d) Nucleoid
Explanation
Mesosomes are areas in the cell membrane of prokaryotic (bacterial) cells that fold inward. They play a role in cellular respiration, the process that breaks down food to release energy. Answer : (d)
Q.50
Gene for antibiotic resistance as found in bacteria are located on … .. [ BHU 2001 ]
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a) Nucleoid
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b) Plasmid
0%
c) Chondrioid
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d) Plastid
Explanation
Answer : (b)
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