Transformation experiment was first performed on which bacteria?
Correct answer: B. Diplococcus pneumoniae
- A. E.coli
- B. Diplococcus pneumoniae
- C. Salmonella
- D. Pasteurella pestis
Explanation
The transformation experiment was first conducted by Frederick Griffith in 1928 using the bacterium Streptococcus pneumoniae, also known by its older name, Diplococcus pneumoniae. His experiment demonstrated the phenomenon of bacterial transformation, where non-virulent bacteria could be changed into virulent ones by a "transforming principle" from heat-killed virulent bacteria. This laid the foundation for the eventual identification of DNA as the genetic material.
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About Chromosomes
Chromosomes are DNA-protein structures that carry genes and become visible during cell division. Coverage includes chromatin, centromeres, sister chromatids, homologous chromosomes, chromosome number, and the distinction between diploid and haploid cells, with links to DNA replication, mitosis and meiosis.
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