The structure of the virus in Figure 23-01 that is common to all viruses is: a.

Question

The structure of the virus in Figure 23-01 that is common to all viruses is: a. 2. b. 3. c. 4. d. 5. e. All of the above. A prophage: a) is phage DNA that is integrated into viral DNA. b) is phage DNA that is integrated into bacterial DNA. c) replicates only when the eukaryotic cell it infects replicates. d) is an underdeveloped lytic virus. e) is a bacterial cell about to lyse. Viruses: a) are very tiny cells on the order of 500 nm. b) contain both RNA and DNA. c) cannot independently perform metabolic activities. d) have a standard morphology that includes a capsid, tail, and tail fibers. e) All of the above. If a chemical has a phenol coefficient (PC) of 63, it means that the chemical a) is more effective than one with a PC of 22 b) it will kill 63% of bacteria c) kills microbes at 63 degree C d) it will kill the bacterium in 63 minutes. The five stages of a lytic infection are attachment, penetration, ______assembly, and release. a) lysis b) prophage c) lysogenesis d) transduction e) replication Which of the following is NOT a halogen a) Iodine b) Mercury e) Chlorine d) Astatine.

Explanation / Answer

39. The right answer is option C.

Prophage refers to a phage (bacteriophage) genome or DNA that is integrated into the circular bacterial DNA. These viral genes do not bring about any changes in the bacterial cell.

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