Consider the following statements:

I:  Asexual reproduction preserves genetic information while sexual reproduction permits variations.
II:  Traditional hybridization often leads to the inclusion and multiplication of undesirable genes along with the desired genes.
III:  rDNA technology allows us to isolate and introduce only one or a set of desirable genes without introducing undesirable genes in the target organism.

Which of the above statements are true?

1. I and II only 2. I and III only
3. II and III only  4. I, II, and III
Subtopic:  Process of Biotech |
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What type of probe would you use for a Western blot experiment?

1.A known DNA sequence.2.An RNA molecule.
3.A purified protein.4.An antibody.

Subtopic:  Process of Biotech |

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Which of the following is not part of the normal process of cloning recombinant DNA in bacteria?

1.  restriction endonuclease digestion of cellular and plasmid DNAs.
2.  production of recombinant DNA using DNA ligase and a mixture of digested cellular and plasmid DNAs.
3.  separation of recombinant DNAs by electrophoresis using the Southern technique to determine where the desired recombinant migrates.
4.  transformation of bacteria by the recombinant DNA plasmids and selection using ampicillin.
Subtopic:  Host & Desired DNA: II | Process of Biotech | Host & Desired DNA |
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The advantage of using DNA polymerases from thermophilic organisms in PCR is that:

1.  the DNA polymerases of these bacteria are much faster than those from other organisms
2.  the DNA polymerases of these bacteria can withstand the high temperatures needed to denature the DNA strands
3.  the DNA polymerases of these bacteria never make mistakes while replicating DNA
4.  all of the above
Subtopic:  Process of Biotech |
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In situ hybridization is used to :

1.  Remove mutations from a chromosome
2.  Remove plasmids from a cell
3.  Clone a gene
4.  Locate a gene on a chromosome
Subtopic:  Process of Biotech |

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