Q. Which of the following can be used as a measure to construct a linkage map of the Hfr chromosome?

View solution

Q. The Hfr chromosome is transferred to the F— cell in a _____________ fashion.

View solution

Q. How much time is required to inject a copy of the whole Hfr E.coli genome?

View solution

Q. How much time is taken by the new DNA to make whole phage particles?

View solution

Q. When viral genome can become integrated into the bacterial genome they are known as ____________

View solution

Q. Bacteriophages inject their nucleic acid into the bacterium.

View solution

Q. Which of the following role is performed by a bacteriophage in transduction?

View solution

Q. The viral DNA may be incorporated into the phage head during phage assembly.

View solution

Q. What is the frequency of defective phage particles in progeny phage produced?

View solution

Q. Fragments transferred by a bacteriophage contains how many genes?

View solution

Q. What is the correct order when coliphage P1 is grown in a thr+ leu+ aziR host is used to infect a thr- leu- azi- recipient bacterial cell?

View solution

Q. How many percent of thr+ transducing phages also carry leu+?

View solution

Q. When the phage transduces only those bacterial genes adjacent to the prophage in the bacterial chromosome then it is known as?

View solution

Q. What are the characteristics of rough pneumococci strain?

View solution

Q. In Griffith’s experiment which of the following strains of pneumococci was isolated from dead mice?

View solution

Q. Which of the following things was identified as the transforming principle?

View solution

Q. We require cell-free DNA for transformation to take place.

View solution

Q. What should be the minimum weight of DNA that is required for successful transformation?

View solution

Q. How many DNA molecules are transferred after each transformation?

View solution

Q. Which of the following enzymes acts on the DNA after its entry into the cell?

View solution