Genetics of Viruses & Bacteria_Timed Practice Answers

H2 Biology Genetics of viruses & bacteria 1 Genetics of Viruses & Bacteria Timed Practice Name: ________________________________ Class: ____________ Multiple Choice Questions 1. A bacterium is infected with an experimentally constructed bacteriophage composed of the T2 phage protein coat and T4 phage DNA. The new phages produced would have ________. A T2 protein and T4 DNA B a mixture of the DNA and proteins of both phages C T4 protein and T4 DNA D T4 protein and T2 DNA ( ) 2. The use of antibiotics is currently the most common method of treating bacterial infections in humans. Phage therapy, which is the use of bacteriophages to treat bacterial infections, is being explored as a potential alternative. Which of the following statements about phage therapy are true? 1 Only a small dose of bacteriophage needs to be administered for the treatment to be effective. 2 One of the safety concerns in the use of phage therapy is that the bacteriophages can infect human cells. 3 Virulent bacteriophages are preferred over temperate bacteriophages. A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only ( )

H2 Biology Genetics of viruses & bacteria 2 3. The diagram shows the life cycle of the HIV. Enzymes P to R are involved in specific processes, indicated by the three bold arrows, occurring during the life cycle of the virus. Which of the following are the correct identities of enzymes P to R and molecules S to U? enzyme P enzyme Q enzyme R molecule S molecule T molecule U A RNA-dependent RNA Polymerase Integrase Protease Positive- sense RNA Negative- sense RNA Positive- sense RNA B Reverse Transcriptase Integrase Protease Positive- sense RNA Positive- sense RNA Positive- sense RNA C RNA-dependent RNA Polymerase Nuclease Lysozyme Negative- sense RNA Negative- sense RNA Negative- sense RNA D Reverse Transcriptase Nuclease Lysozyme Negative- sense RNA Positive- sense RNA Negative- sense RNA ( )

H2 Biology Genetics of viruses & bacteria 3 4. The photomicrographs show two different processes of genetic transfer in bacteria. Which statement is true for both processes? A There is physical contact between the donor and recipient. B Specific genes in the donor are required for genetic transfer to occur. C Any gene in the bacterial genome can be transferred. D None of the