Question

Conjugation in bacteria was discovered by
A)Robert Koch
B)Schaudinn and Hoffmann
C)Lederberg and Tatum
D)Leeuwenhoek

Answer 1

Hint: Bacteria is a small microscopic organism and they have the capability to reproduce by binary fission. Conjugation is generally seen in microorganism as a mode of horizontal transmission for change of genetic material.

Complete answer:
Conjugation is a manner that promotes DNA transfer from a donor to a recipient cell phone through making bridge-like connections between two cells. Conjugation is a system that promotes DNA switching from a donor to a recipient cell mediated via bodily contact. Bacterial conjugation is the mechanism of horizontal gene transfer between two bacterial cells.
Conjugation is used to show a key constituent in the spreading of antibiotic and virulence genes to human pathogenic bacteria. A separate, non- chromosomal DNA ring, known as an F-plasmid, is divided into two strands, and one of them transferred to the recipient bacteria.

Now let us find solution from given option:
Robert Koch : He worked with anthrax and he found that spores of anthrax are present in bacteria. He gave about disease anthrax
Schaudinn and Hoffmann : He worked with sexually transmitted disease and found the causal organism of syphilis
Lederberg and Tatum : The mechanism of conjugation can be divided into three crucial components coupling protein relaxum and a type of IV protein secretion system. The conjugation is located by Lederberg and Tatum. They showed that the bacterium Escherichia coli entered a sexual segment throughout which it could share genetic information.
Leeuwenhoek: By making use of a microscope, he worked with bacteria and protozoa.

Hence, the correct answer is option (C)

Note: Conjugation presents many risks as well, because the technique of in vivo bacterial conjugation can't be absolutely managed by using the scientists, unintended horizontal gene switch is reason for concern. If the AMP gene had been transferred to the natural bacterial Flora they too would be broken upon promoter activation.