Question

Part A) Answer the Question below.

1. While bacteria are generally considered to be asexual, ______________ bacteria can have a sex pilus for use in genetic recombination via HGT.

A. conjugative B.Cojoined C.Transductive D.Transformative

2. _______________ chemically stimulates male gametes of Allomyces.

a. Parisin b.Sirenin c.Parisenes d.Alpha factor.

Answer 1

Ans) A. Conjugative

Conjugation: is a type of recombination in bacteria which involves the transfer of DNA from one bacterium to another via direct cell contact. It is discovered by the Lederberg and Tatum in E.coli. The pilli is required for the conjugation which is coded by the F-plasmid or conjugative plasmid/sex factor. The bacteria which have the F-plasmid are conjugative i.e. they have the capacity carry conjugation.

Ans) B. Sirenin

Sirenin is the first fungal sex hormone discovered by the Leonard Machlis in 1958. The female gametes & gametangia of fungi belonging to the chytridiomycete genus produce the Sirenin to attract the male gametes of Allomyces.