Microbial Recombination and Gene Transfer B. A complex membrane structure that covers the
chromosome of bacteria
1. The plasmid-mediated properties is/are C. Small, circular DNA molecules that can exist
independently of chromosomes commonly found in
A. fermentation of lactose bacteria
B. production of enterotoxin D. None of the above
C. resistance to antibiotics
D. all of these 8. In lysogeny,
2. In the extracellular medium, DNA-degrading enzymes A. a bacteriophage transfers bacterial DNA
would likely be to prevent transfer of DNA by B. bacteria take up double stranded DNA from the
environment
A. conjugal transfer by a self-transmissible plasmid C. DNA-degrading enzymes in the extracellular medium
B. generalized phage transduction would stop the process
C. natural transformation D. a bacteriophage genome is integrated into the bacterial
D. none of the above genome
3. What is the term used for a segment of DNA with one or 9. A microarray differs from a gene fusion in that, it
more genes in the centre and the two ends carrying
inverted repeat sequences of nucleotides? A. carries DNA segments from many different genes
B. is not constructed by cloning
A. Plasmid C. gives direct measurement of mRNA level
B. Transposon D. all of the above
C. Insertion sequence
D. None of these 10. Who discovered transposons (jumping genes)?
4. The plasmids can be eliminated from a cell by the A. Abelson
process known as B. Harvey
C. McClintock
A. curing D. Griffith
B. breaking
C. fixing 11. Which type of plasmid can exist with or without being
D. expulsion integrated into the host's chromosome?
5. Recombination of virus genomes occurs A. Medisome
B. Lisosome
A. by transduction C. Lysogen
B. by transription D. Episome
C. simultaneous infection of a host cell by two viruses with
homologous chromosomes 12. The main difference between a self-transmissible and a
D. by transformation mobilizable plasmid is that the self-transmissible plasmid
6. The type of recombination that commonly occurs A. transfers both strands of the plasmid DNA
between a pair of homologous DNA sequences is, B. carries genes encoding the mating apparatus
C. transfers antibiotic resistance genes
A. mutagenic recombination D. usually has a transposon inserted into it
B. site-specific recombination
C. replicative recombination 13. Which of the following is the cause for drug resistance
D. general recombination in tuberculosis?
7. Which of the following statement describes plasmids? A. Mutation
B. Transduction
A. Another name for a protoplast C. Transformation
D. Conjugation
chromosome of bacteria
1. The plasmid-mediated properties is/are C. Small, circular DNA molecules that can exist
independently of chromosomes commonly found in
A. fermentation of lactose bacteria
B. production of enterotoxin D. None of the above
C. resistance to antibiotics
D. all of these 8. In lysogeny,
2. In the extracellular medium, DNA-degrading enzymes A. a bacteriophage transfers bacterial DNA
would likely be to prevent transfer of DNA by B. bacteria take up double stranded DNA from the
environment
A. conjugal transfer by a self-transmissible plasmid C. DNA-degrading enzymes in the extracellular medium
B. generalized phage transduction would stop the process
C. natural transformation D. a bacteriophage genome is integrated into the bacterial
D. none of the above genome
3. What is the term used for a segment of DNA with one or 9. A microarray differs from a gene fusion in that, it
more genes in the centre and the two ends carrying
inverted repeat sequences of nucleotides? A. carries DNA segments from many different genes
B. is not constructed by cloning
A. Plasmid C. gives direct measurement of mRNA level
B. Transposon D. all of the above
C. Insertion sequence
D. None of these 10. Who discovered transposons (jumping genes)?
4. The plasmids can be eliminated from a cell by the A. Abelson
process known as B. Harvey
C. McClintock
A. curing D. Griffith
B. breaking
C. fixing 11. Which type of plasmid can exist with or without being
D. expulsion integrated into the host's chromosome?
5. Recombination of virus genomes occurs A. Medisome
B. Lisosome
A. by transduction C. Lysogen
B. by transription D. Episome
C. simultaneous infection of a host cell by two viruses with
homologous chromosomes 12. The main difference between a self-transmissible and a
D. by transformation mobilizable plasmid is that the self-transmissible plasmid
6. The type of recombination that commonly occurs A. transfers both strands of the plasmid DNA
between a pair of homologous DNA sequences is, B. carries genes encoding the mating apparatus
C. transfers antibiotic resistance genes
A. mutagenic recombination D. usually has a transposon inserted into it
B. site-specific recombination
C. replicative recombination 13. Which of the following is the cause for drug resistance
D. general recombination in tuberculosis?
7. Which of the following statement describes plasmids? A. Mutation
B. Transduction
A. Another name for a protoplast C. Transformation
D. Conjugation
