Complete Question:
Plants are susceptible to bacterial infections, which can damage their structure or even kill them. Which of the following would be the best antibiotic to treat a plant that is infected with bacteria?
A) a drug that interferes with mitochondria function
B) a drug that disrupts cell wall structure and function
C) a drug that destroys the central vacuole
D) a drug that blocks gene expression in circular chromosomes
Answer: Option D (a drug that blocks gene expression in circular chromosomes.
Explanation: Circular chromosomes are chromosomes found in prokaryotes (including bacteria). Gene expression process in the cell is powered by the barterium’s circular chromosomes.
However, gene expression refers to process in which the information present in the gene (DNA and RNA) are used to produce proteins for specific cell functions. Part of the functions enables the cell to respond to change in it’s fluctuating environment. Which in turn, enable the inner environment fairly stable.
Some proteins are synthesized to regulate the proper functioning of other organelles of the cell including the cell wall, vacuole and etc.
Thus, introduction of antibiotics that disrupts the gene expression in the circular chromosomes will be the best way to eliminate the bacteria affecting the plants. Since, if there's no gene expression in action, no protein is produced for proper organelles and the whole cell functioning. Hence, the bacteria are rendered dead.
