Which of the following is incorrect observation of experiments by Avery and coworkers?
Correct answer: C. Transforming activity continues after destruction of DNA
- A. Transforming activity continues after destruction of protein
- B. Transforming activity continues after destruction of lipids
- C. Transforming activity continues after destruction of DNA
- D. Transforming activity continues after destruction of carbohydrates
Explanation
In the experiments conducted by Avery, MacLeod, and McCarty in 1944, they demonstrated that when DNA was destroyed using enzymes that specifically targeted DNA (DNase), the transforming activity responsible for converting non-virulent bacteria into virulent ones ceased. This provided strong evidence that DNA, rather than protein or RNA, was the substance responsible for carrying genetic information. Therefore, the correct statement should be that transforming activity ceases after destruction of DNA.
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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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