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 Multiple Choice QuestionsMultiple Choice Questions


In lysogenic phase which of the following takes place?

  • Phage DNA integrated with host genome and does not multiplied

  • Phage DNA does not integrate with host genome

  • Phage DNA integrates with host genome and bacterial cell does not lyse

  • Phage DNA integrated with host DNA and multiplied


Science of engineering and technology applied to life sciences is

  • Biotechnology

  • Genetic engineering

  • Pathology

  • Biological science


Plasmid is

  • small extrachromosomal circular self replicating DNA that can carry genes into host organism

  • bacteriophage

  • DNA found in mitochondria

  • DNA incorporated in bacterial chromosome


e -DNA is formed from m-RNA by which enzyme:

  • restriction endonuclease

  • reverse transcriptase

  • DNA polymerase

  • RNA polymerase


Hybridoma technology is used to :

  • kill the cancer cells

  • formation of somaclonal antibodies

  • formation of somatic hybrids

  • formation of antibiotics


Kohler and Milstein developed biotechnology for :

  • monoclonal antibodies

  • steroid synthesis

  • immobilization of enzymes

  • myeloma


Introduction of foreign genes for improving genotype is

  • biotechnology

  • vernalization

  • tissue culture

  • genetic engineering


The first recombinant DNA was constructed by linking an antibiotic resistant gene with the native plasmid of V

  • Escherichia coli

  • Salmonella typhimurium

  • Clostridium butylicum

  • Acetobacter aceti

  • Acetobacter aceti


The polymerase chain reaction1 (PCR) is a technique that is used for

  • in vivo replication of specific DNA sequence using thermostable DNA polymerase

  • in vitro synthesis of mRNA

  • in vitro replication of specific DNA sequence using thermostable DNA polymerase

  • in vivo synthesis of mRNA

  • in vivo synthesis of mRNA



Bioreactors are useful in

  • Separation and purification of a product

  • Processing of large volumes of culture

  • Micro-injection

  • Isolation of genetic material

  • Isolation of genetic material


Processing of large volumes of culture

Bioreactors are large vessels (having a volume of 100 to 1000 litres) in which raw materials are biologically, converted into specific product by microbes, plant and animal cells or their enzymes.