12th Standard CBSE - Biology - Biotechnology: Principles and Processes

Buy 12th Biology MCQ Online Test CBSE Practice test pack

Question - 1

Human genome project was discovered by

  • A Francis Collins and Roderick
  • B Watson and Crick
  • C Beadle and Tatum
  • D Paul Berg and Wollman

Question - 2

Transgenic plants are developed by

  • A clone and genetically modified genes
  • B introduction of foreign genes
  • C genetic engineering
  • D purified genes

Question - 3

Restriction endonucleases are most widely used in recombinant DNA technology. They are obtained from

  • A Bacteriophages
  • B Bacterial cells
  • C Plasmids
  • D All prokaryotic cells

Question - 4

Which is used in molecular genetic engineering?

  • A Tomato
  • B Tobacco
  • C Carrot
  • D Arabidopsis

Question - 5

Viral genome incorporated into host DNA is called

  • A Prophase
  • B Prophage
  • C Bacteriophage
  • D None of these

Question - 6

Two microbes found to be very useful in genetic engineering are

  • A Crown gall bacterium and Coenorhabdities elegans
  • B Escherichia coli and Agrobacterium tumefaciens
  • C Vibria cholerae and a tailed bacteriophage
  • D Diplococcus sp. and Pseudomonas sp.

Question - 7

Restriction endonuclease

  • A Synthesizes DNA
  • B Cuts the DNA molecule randomly
  • C Cuts the DNA molecule at specific sites
  • D Restricts the synthesis of DNA inside the nucleus

Question - 8

The process of reverse transcription was brought to light by the work of

  • A George Beadle and Edward Tatum
  • B Garrod
  • C H.W. Temin and D. Baltimore
  • D R.W. Holley and Grover
  • E Marshall and W. Nirenberg

Question - 9

Genetic engineering is possible because

  • A the phenomenon of transduction in bacteria is well understood
  • B we can see DNA by electron microscope
  • C we can cut DNA at specific sites by endonucleases like DNAase 1
  • D restriction endonucleases purified from bacteria can be used in vitro

Question - 10

Who discovered recombinant DNA (rDNA) technology?

  • A Har Gobind Khorana
  • B James D. Watson
  • C Stanley Cohen and Herbert Boyer
  • D Walter Sutton and Avery
  • E Williams Bateson and Hugo de Vries