BOTANY

BOTANY

BIOTECHNOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Bt toxin genes were isolated from
A
beetle
B
bacillius thuringenesis
C
yeast
D
mushrooms
Explanation: 

Detailed explanation-1: -Bt toxin genes were isolated from the bacterium Bacillus thuringiensis and incorporated into several crops like cotton. The choice of the genes depends on the crop and the targeted pest, as most Bt toxins are insect group specific.

Detailed explanation-2: -Specific Bt toxin genes obtained from bacteria Bacillus thuringiensis are used in several crop plants. The toxin is coded by a gene called cry, which is of various types. For example, proteins encoded by the genes cry I Ac and cry II Ab controls the cotton bollworms and that of cry I Ab controls corn borer.

Detailed explanation-3: -Bacillus thuringiensis (Bt) is an agriculturally important bacterial strain having Bt genes which encode for the production of insecticidal proteins in the vegetative stage and during the sporulation phase.

Detailed explanation-4: -1998a; Schnepf et al. 1998). Bacillus thuringiensis has been isolated from different natural samples, such as soil (Martin and Travers 1989), phylloplanes (Smith and Couche 1991; Mizuki et al. 1999) and stored products (Delucca et al.

Detailed explanation-5: -Muskan Anand. Cry I AC is a toxin isolated from B. Thuringiensis and its target pest is cotton bollworm.

There is 1 question to complete.