19. A base substitution could result in a: a. wild type b. missense mutation c.

Question

19. A base substitution could result in a: a. wild type b. missense mutation c. silent mutation d. all of above 20. Which is an effective against that can be used to prevent spread of tuberculosis? a. chlorine aerosol b. UV light c. ethidium bromide d. thymine spray 21. Transduction uses what type of mechanism to get DNA into the bacterial cell? a. a phage b. a double stranded DNA probe c. phenol d. a detergent 22. Antibiotic resistance (genetically) is commonly associated and transfe with/among bacteria through? a. ribosomes b. plasmids c. cell walls structures d. all of above 23. In conjugation, the connecting structure between the two cells (gram negative -G.) is called: a. pilus b. connector c. transfer device d. tubule

Explanation / Answer

19) the correct option is "b" Missense mutation.

Because, a base substitution in a DNA may cause incorporation of wrong aminoacid in a place of different aminoacid, which will actually changes the structure and functional properties of a protein.

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