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Biology Question 105 – NEET-UG 2025

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Streptokinase produced by bacterium Streptococcus is used for

Many microorganisms produce enzymes or other biomolecules that have significant therapeutic applications in medicine.

Step 1: Identify the Substance and its Origin✦ Active

Streptokinase is an enzyme produced by the bacterium \textit{Streptococcus}. It is a well-known biotechnological product with medical applications.

Step 2: Recall the Primary Function of Streptokinase○ Expand

Streptokinase acts as a 'clot buster' or thrombolytic agent. It works by activating plasminogen to form plasmin, which then degrades fibrin clots in blood vessels.

💡 Teacher's Secret Hint

This enzyme is crucial in treating conditions where blood clots pose a severe risk.

Step 3: Match Function to Options○ Expand

Based on its fibrinolytic activity, streptokinase is used medically for removing clots from blood vessels, particularly in patients who have suffered a myocardial infarction (heart attack) or other thrombotic conditions. Options (1) and (2) are related to other microbial processes, and (3) is not a primary use of streptokinase.

💡 Teacher's Secret Hint

Remember the specific applications of microbial enzymes in medicine, industry, and daily life.

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