Q. What is the shape of helical phages?

View solution

Q. Which of the following are said to have binal symmetry?

View solution

Q. The DNA of phage lambda is circular both in the virion and in the host cell.

View solution

Q. Which of the following is a family of lambda phage viruses?

View solution

Q. Which of the following coliphage has tadpole shape?

View solution

Q. Which of the following are filamentous phage of E.coli?

View solution

Q. Which of the following is the first step in replication by bacterial phages?

View solution

Q. At what temperature incubation is required for the adsorption of phage T4 and DNA injection into E.coli?

View solution

Q. Which of the following is the correct sequence of events in replication by bacterial phage?

View solution

Q. The protein coat of the virus remains outside the host cell.

View solution

Q. The delayed early genes codes for which of the following enzymes?

View solution

Q. Which of the following enzymes transcribe late genes?

View solution

Q. In the growth curve of plaque-forming units, the time from infection until lysis is known as ____________________

View solution

Q. What is the colour of the plaque formed?

View solution

Q. What does a viral DNA becomes after being associated with the bacterial chromosome?

View solution

Q. In which of the following method, the viral particles are transmitted through lysis of cell?

View solution

Q. epressor protein makes the cell resistant to lysis.

View solution

Q. Which of the following is the characteristic of repressor protein?

View solution

Q. cro gene is an example of immunity repressor.

View solution

Q. Which of the following gene codes for an enzyme which directs the insertion of the phage DNA into the bacterial chromosome?

View solution