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question_answer1)
Bacterial cell divides in every minute it takes one hour to fill up a cup. How much time will be taken to fill half the cup [CPMT 1981, 84; DPMT 1982]
A)
59 minutes done
clear
B)
30 minutes done
clear
C)
60 minutes done
clear
D)
29 minutes done
clear
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question_answer2)
Under the optimum condition of temperature and nutrition most of the bacteria divide at the interval [MP PMT 1989]
A)
24 hours done
clear
B)
20 minutes done
clear
C)
60 minutes done
clear
D)
5 minutes done
clear
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question_answer3)
Transformation experiments using Pneumococcus bacteria led to the hypothesis that [CPMT 1988; CBSE PMT 1993, 99]
A)
DNA is the genetic material done
clear
B)
Bacteria have sexual reproduction done
clear
C)
Chromosomes are made up of DNA done
clear
D)
RNA is the transfer link done
clear
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question_answer4)
The process in which viruses are involved in sexual reproduction of bacteria is called [BHU 1977, 81; AFMC 1982; CPMT 1993, 98, 99, 2001; MP PMT 1996; BHU 2000, 01; JIPMER 2001; Haryana PMT 2005]
A)
Transduction done
clear
B)
Transcription done
clear
C)
Transformation done
clear
D)
Translation done
clear
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question_answer5)
Bacteria commonly reproduce vegetatively by [AFMC 1988]
A)
Binary fission done
clear
B)
Budding done
clear
C)
Conjugation done
clear
D)
Oidia done
clear
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question_answer6)
Some bacteria are not easily killed because of [MP PMT 1986]
A)
Chitinous wall done
clear
B)
Endospore formation done
clear
C)
Presence of mesosome done
clear
D)
High tolerance done
clear
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question_answer7)
The bacteria growing on medium and the mass so formed is called
A)
Thallus done
clear
B)
Spores done
clear
C)
Colony done
clear
D)
Tissue done
clear
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question_answer8)
Why the food can be kept for a longer time in cold house than in normal conditions [CPMT 1971]
A)
Insect can not enter done
clear
B)
Bacterial multiplication stops done
clear
C)
Bacterial multiplication is reduced done
clear
D)
There is plasmolysis at low temperature done
clear
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question_answer9)
Why bacteria can be considered fission fungi
A)
They show budding done
clear
B)
They show fission done
clear
C)
Show fission and fungal characters done
clear
D)
Show fission and algal characters done
clear
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question_answer10)
How many bacteria are produced in four hours if a bacterium divides once in half an hour [DPMT 1990]
A)
8 done
clear
B)
64 done
clear
C)
16 done
clear
D)
256 done
clear
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question_answer11)
The bacteria grown in the medium containing \[{{S}^{35}}\] as lone source of sulphur show its incorporation into [AIIMS 1994]
A)
DNA done
clear
B)
Protein done
clear
C)
RNA done
clear
D)
None of the above done
clear
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question_answer12)
There is no alternation of generation in Esche-richia coli because there is no [CBSE PMT 1994]
A)
Syngamy done
clear
B)
Reduction division done
clear
C)
Conjugation done
clear
D)
None of these done
clear
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question_answer13)
The experimental system used in studies of the discovery of replication of DNA has been [BHU 1994]
A)
Drosophila melanogaster done
clear
B)
Pneumococcus done
clear
C)
Escherichia coli done
clear
D)
Neurospora crassa done
clear
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question_answer14)
Pili in bacteria represent [BHU 2001]
A)
Extra-chromosomal genetic element done
clear
B)
Protoplasmic outgrowths of donor cells done
clear
C)
Small flagella done
clear
D)
Special bacterial cilia done
clear
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question_answer15)
In the bacterium Bacillus subtilis the cells often become attached from end to end forming long filamentous chains, which are embedded in a mass of mucilage forming a scum layer on substratum. It is called as
A)
Palmella stage done
clear
B)
Torula stage done
clear
C)
Zoogloea stage done
clear
D)
None of the above done
clear
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question_answer16)
A bacterial cell undergoes binary fission every twenty minutes. Starting with a single bacterium how many bacteria will be produced at the end of 3 hours
A)
128 done
clear
B)
256 done
clear
C)
512 done
clear
D)
1022 done
clear
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question_answer17)
Transfer of genetic information from one bacterium to another in the transduction process is through [CBSE PMT 1998]
A)
Physical contact between donor and recipient strains done
clear
B)
Conjugation between opposite strain bacterium done
clear
C)
Bacteriophages released from the donor bacterial strain done
clear
D)
Another bacterium having special organ for conjugation done
clear
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question_answer18)
Conjugation in bacteria was discovered by [MP PMT 2000]
A)
Robert Koch done
clear
B)
Schaudinn and Hoffmann done
clear
C)
Lederberg and Tatum done
clear
D)
Leeuwenhoek done
clear
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question_answer19)
In bacteria, sexual conjugation is promoted by
A)
R?factor done
clear
B)
col-factor done
clear
C)
F?factor done
clear
D)
None of the above done
clear
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question_answer20)
Sex factor in bacteria is [CBSE PMT 1996; BHU 1999]
A)
F?replicon done
clear
B)
Chromosomal replicon done
clear
C)
RNA done
clear
D)
Sex pilis done
clear
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question_answer21)
The sexuality in bacteria was established by [MP PMT 1996]
A)
Lederberg and Tatum done
clear
B)
H. J. Muller done
clear
C)
Hargobind Khorana done
clear
D)
Ochoa and Kornberg done
clear
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question_answer22)
On the basis of which activity of bacteria it has been proved for the first time that DNA is genetic material
A)
Conjugation done
clear
B)
Transformation done
clear
C)
Transduction done
clear
D)
Asexual reproduction done
clear
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question_answer23)
How many generations are required for a bacterium to produce 1024 cells by vegetative reproduction
A)
256 done
clear
B)
10 done
clear
C)
6 done
clear
D)
8 done
clear
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question_answer24)
Transformation in bacteria was discovered by [MP PMT 1997, 98, 2000]
A)
Lederberg done
clear
B)
Griffith done
clear
C)
Avery et al done
clear
D)
Tatum done
clear
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question_answer25)
Penicillin inhibits bacterial multiplication because [CPMT 1998]
A)
It checks spindle formation done
clear
B)
It destroys chromation done
clear
C)
It inhibits cell wall formation done
clear
D)
It checks RNA synthesis done
clear
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question_answer26)
The process of replication in plasmid DNA, other than initiation, is controlled by [RPMT 1999]
A)
Plasmid gene done
clear
B)
Bacterial gene done
clear
C)
Cytoplasmic gene done
clear
D)
Mitochondrial gene done
clear
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question_answer27)
Bacteria reproduce sexually by [MP PMT 2000]
A)
Endospores done
clear
B)
Transformation done
clear
C)
Conidia done
clear
D)
Exospores done
clear
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question_answer28)
Transfer of DNA from one bacteria to another by contact is known as [Kerala CET 2001]
A)
Conjugation done
clear
B)
Transformation done
clear
C)
Transduction done
clear
D)
Transcription done
clear
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question_answer29)
Transformation experiment was performed on which of the following bacteria [CBSE PMT 2002]
A)
E. coli done
clear
B)
Salmonella done
clear
C)
Pasturella pestis done
clear
D)
Diplococcus pneumonia done
clear
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question_answer30)
Viral genome incorporated and integrates with bacterial genomes is refer to as [AFMC 2005]
A)
Prophages done
clear
B)
RNA done
clear
C)
DNA done
clear
D)
Both (b) and (c) done
clear
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