Q1 - Bacteriophages are viruses that infect:
A. 1 - Plant cells.
B. 2 - Bacterial cells.
C. 3 - Archaea cells.
D. 4 - Eukaryotic cells.
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Q2 - Which of the following options is not a bacteriophage resistance mechanism developed by bacteria?
A. 1 - CRISPR/Cas.
B. 2 - Restriction/Modification.
C. 3 - Iron acquisition systems.
D. 4 - Mutation of the receptor.
Q1 - What happens when Cas9 is programmed to target a gene in the chromosome of bacteria?
A. 1 - The target gene is silenced.
B. 2 - The bacteria die.
C. 3 - The target gene is mutated.
Q2 – What is the protospacer adjacent motif (PAM)?
A. 1 - A small sequence motif identified by Cas9 next to the target sequence.
B. 2 - A small sequence motif on the guide RN
C. 3 - A region in the Cas9 protein.
Q1 – Which of the following answers applies to “old antibiotics”?
A. 1 - They were marketed before 1950.
B. 2 - They are antibiotics that are no longer available in the market.
C. 3 - They are the only antibiotics that remain active for the treatment of infections due to extensively drug resistant (XDR) isolates.
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