Question

Identify blank spaces A, B, C and D in the following table and select the correct option: 

Type of Microbe	Scientific Name	Commercial Product
Bacterium	A	Streptokinase
B	Aspergillus niger	Citric acid
Fungus	Trichoderma polysporum	C
Bacterium	D	Butyric acid

• A. A $\rightarrow$ Streptococcus, B $\rightarrow$ Fungus, C $\rightarrow$ Cyclosporin-A, D $\rightarrow$ Clostridium butylicum
• B. A $\rightarrow$ Clostridium butylicum, B $\rightarrow$ Bacteria, C $\rightarrow$ Citric acid, D $\rightarrow$ Streptococcus
• C. A $\rightarrow$ Streptococcus, B $\rightarrow$ Yeast, C $\rightarrow$ Cyclosporin-A, D $\rightarrow$ Lactobacillus
• D. A $\rightarrow$ Streptococcus, B $\rightarrow$ Fungus, C $\rightarrow$ Statins, D $\rightarrow$ Clostridium butylicum

Hint:

Streptococcus → Streptokinase, Aspergillus niger → Citric acid, Trichoderma polysporum → Cyclosporin-A, Clostridium butylicum → Butyric acid.

Answer 1

The Correct Option is A

Concept: Microorganisms are widely used for producing antibiotics, enzymes, organic acids and medically important compounds. Different microbes are associated with different industrial products.

Step 1: Determine A. Streptokinase is produced by the bacterium Streptococcus. Thus, \[ A = \textit{Streptococcus} \]

Step 2: Determine B. Aspergillus niger is a fungus used commercially for citric acid production. Thus, \[ B = \text{Fungus} \]

Step 3: Determine C. Trichoderma polysporum produces Cyclosporin-A. Cyclosporin-A is an immunosuppressive agent used during organ transplantation. Thus, \[ C = \text{Cyclosporin-A} \]

Step 4: Determine D. Butyric acid is produced by \[ D = \textit{Clostridium\ butylicum} \]

Step 5: Match with options. Only option (A) satisfies all four identifications.