NEET Botany Biological Classification Questions Solved


Read the following statement regarding bacteria.

I. Bacteria exchnage their genetic matter through conjugation which involve cell to cell contact.

II. Transduction in 'Salmonella is reported by Tatum and Lederberg in 1952.

III. Citrus canker disease is caused by bacteria Xanthomonas citri.

IV. Hans Christian gram's staining method is based on cell wall composition of bacteria.

Choose the correct option with true statements.

(1) I and III

(2) I, III and IV

(3) I, II, and III

(4) II and IV

Audio Explanation:


(2) All statements are true except II.

Conjugation is process of transfer of genetic material that involve cell to cell connection. It was first reported in E. coli by Tatum and Lederberg in 1946. Transduction is a process of transfer of DNA by bacteriophage virus in bacteria. It was first reported in the Salmonella by Zinder and Lederberg in 1952. Gram staining is based on the composition or size of bacterial cell wall as gram +ve bacteria has thick cell wall compare to gram –ve bacteria.

Difficulty Level:

  • 14%
  • 60%
  • 24%
  • 4%