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Home⇒ Medical Science⇒ Microbiology⇒ Microbial recombination and gene transfer
1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q21 ⇒ Which of the following statement describes plasmids? Small, circular DNA molecules that can exist independently of chromosomes commonly found in bacteria [other wrong options] [Discuss in forum] Another name for a protoplast A complex membrane structure that covers the chromosome of bacteria None of the above |
Q22 ⇒ Diagnostic DNA probes have been developed for all of the above [other wrong options] [Discuss in forum] Mycobacterium tuberculosis Hepatitis B virus Human immunodeficiency virus |
Q23 ⇒ Penicillin resistance in staphylococci is acquired due to transduction [other wrong options] [Discuss in forum] conjugation mutation transformation |
Q24 ⇒ Which of the following term describes the relationship between a virus and host where no new viral particles are produced and the viral genome is replicated along with host chromosome? Lysogeny [other wrong options] [Discuss in forum] Lysis Transformation Conjugation |
Q25 ⇒ What is the term used for a segment of DNA with one or more genes in the centre and the two ends carrying inverted repeat sequences of nucleotides? Transposon [other wrong options] [Discuss in forum] Plasmid Insertion sequence None of these |
Q26 ⇒ The main difference between a self-transmissible and a mobilizable plasmid is that the self-transmissible plasmid carries genes encoding the mating apparatus [other wrong options] [Discuss in forum] transfers both strands of the plasmid DNA transfers antibiotic resistance genes usually has a transposon inserted into it |
Q27 ⇒ When composite transposons are formed two IS elements integrate into a chromosome with only a small distance separating them [other wrong options] [Discuss in forum] a small deletion occurs in the transposase gene of an IS element a small deletion occurs in the transposase gene of an IS element and plasmid is integrated an IS element integrates with another IS element with the help of a plasmid |
Q28 ⇒ Plasmid that carries genes encoding enzymes, which degrade substances such as aromatic compounds, pesticides or sugar are metabolic plasmid [other wrong options] [Discuss in forum] F factors virulence plasmid none of these |
Q29 ⇒ Recombination of virus genomes occurs simultaneous infection of a host cell by two viruses with homologous chromosomes [other wrong options] [Discuss in forum] by transduction by transription by transformation |
Q30 ⇒ Which of the following statement can describe horizontal transfer? The transmission of genetic information from one independent, mature organism to another [other wrong options] [Discuss in forum] The synthesis of protein in RNA The transmission of genetic information from parent to offspring The synthesis of RNA from a DNA template |
Q31 ⇒ The transposase gene encodes an enzyme that facilitate site-specific integration of transposable elements [other wrong options] [Discuss in forum] viral replication within a genome general recombination none of the above |
Q32 ⇒ The term used for acquisition of naked DNA from its environment and its incorporation in their genome by a bacterium is transformation [other wrong options] [Discuss in forum] lysogenic conversion conjugation transduction |
Q33 ⇒ Which of the following is used by microbial genetisists as a tool? All of these [other wrong options] [Discuss in forum] Bacteriophage Plasmids Transposable elements |
Q34 ⇒ The plasmid-mediated properties is/are all of these [other wrong options] [Discuss in forum] fermentation of lactose production of enterotoxin resistance to antibiotics |
Q35 ⇒ Who discovered transposons (jumping genes)? McClintock [other wrong options] [Discuss in forum] Abelson Harvey Griffith |
Q36 ⇒ What information can be generated by interrupted mating experiments? Bacterial genome maps [other wrong options] [Discuss in forum] Levels of DNA homology DNA nucleotide sequences Proteomics of the bacteria |
Q37 ⇒ The transducing particles carry only specific portions of the bacterial genome in which of the following transduction? Specialized transduction [other wrong options] [Discuss in forum] General transduction Abortive transduction None of these |
Q38 ⇒ Which of the following genetic elements carry the genes required for integration into host chromosomes? Transposons [other wrong options] [Discuss in forum] Replicon Plasmids Tandons |
Q39 ⇒ A microarray differs from a gene fusion in that, it all of the above [other wrong options] [Discuss in forum] carries DNA segments from many different genes is not constructed by cloning gives direct measurement of mRNA level |
Or |