Question

Match the following (List-I: Organism; List-II: Use in Biotechnology).

• A. A-IV, B-III, C-I, D-II
• B. A-IV, B-III, C-II, D-I
• C. A-II, B-I, C-IV, D-III
• D. A-II, B-IV, C-II, D-I

Hint:

Bt toxin $\rightarrow$ Bacillus thuringiensis Taq polymerase $\rightarrow$ Thermus aquaticus Gene transfer vector $\rightarrow$ Agrobacterium tumefaciens

Answer 1

The Correct Option is A

Concept: Biotechnology employs different microorganisms for specific purposes such as genetic engineering, recombinant DNA technology and production of useful proteins.

Step 1: Bacillus thuringiensis.
This bacterium produces: \[ \boxed{\text{Cry proteins}} \] used in Bt crops. Hence: \[ A \rightarrow IV \]

Step 2: Thermus aquaticus.
This thermophilic bacterium provides: \[ \boxed{\text{Taq DNA polymerase}} \] used in PCR. Hence: \[ B \rightarrow III \]

Step 3: Agrobacterium tumefaciens.
It serves as a natural gene transfer vector in plants. Thus: \[ C \rightarrow I \]

Step 4: Salmonella typhimurium.
Associated with early recombinant DNA studies. Hence: \[ D \rightarrow II \] Final matching: \[ \boxed{A-IV,\; B-III,\; C-I,\; D-II} \] Therefore option (A) is correct.