MCQ
Sigmoid growth curve is represented by
- A$d N / d t=r N$
- ✓$d N / d t=r N(1-N / K)$
- C$N t=N_{o}+B+I-D-K$
- D$d N / d t=1-N / K$

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| Microbe | Product | Application |
| $(a)$ Streptococccus | Streptokinase | Removal of clot fromblood vessel |
| $(b)$ Clostridium butylicum | Lipase | Removal of oil stains |
| $(c)$ Trichoderma polysporum | Cyclosporin $A$ | Immuno-suppressive drug |
| $(d)$ Monascus purpureus | Statins | Lowering of blood cholesterol |