Question

Match the organism with its use in biotechnology.

$\begin{array}{cccc}\text{(a)}& \text{Thermus aquaticus}& \left(i\right)& \text{First rDNA constructed by Cohen and Boyer}\\ \text{(b)}& \text{Agrobacterium tumefaciens}& \text{(ii)}& \text{Forms insecticidal proteins in inactive form}\\ \text{(c)}& \text{Bacillus thuringiensis}& \text{(iii)}& \text{Used as a vector to introduce nematode}\\ & & & \text{specific genes into the host plant}\\ \text{(d)}& \text{Salmonella typhimurium}& \text{(iv)}& \text{Taq}\text{polymerase is used for extension step in PCR}\end{array}$

Select the correct option from the following given options.

• A. (a) - (iv), (b) - (iii), (c) - (i), (d) - (ii)
• B. (a) - (iv), (b) - (iii), (c) - (ii), (d) - (i)
• C. (a) - (iii), (b) - (iv), (c) - (ii), (d) - (i)
• D. (a) - (ii), (b) - (iv), (c) - (iii), (d) - (i)

Answer 1

The correct option is B (a) - (iv), (b) - (iii), (c) - (ii), (d) - (i)

Thermostable Taq polymerase is isolated from bacterium, Thermus aquaticus which is used in PCR. The tumor inducing (Ti) plasmid of Agrobacterium tumefaciens is modified into cloning vector to deliver genes of human interest. Bacillus thuringiensis produces protein crystals having toxic insecticidal proteins.