Which of the following statements are correct with respect to a biorector ?
(i) It can process large volumes of culture.
(ii) It provides optimum temperature and pH.
(iii) It is a completely automated tool.
(iv) It is a compact thermal cycler.

Options

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

Answer

To solve the question regarding the correctness of statements about a bioreactor, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Statement (i): It can process large volumes of culture.**
- **Analysis:** Bioreactors are designed to handle large volumes of culture, making them suitable for industrial applications where mass production of biological products is required.
- **Conclusion:** This statement is **correct**.

2. **Statement (ii): It provides optimum temperature and pH.**
- **Analysis:** Bioreactors are equipped with systems to control environmental conditions such as temperature and pH, which are crucial for the growth of microorganisms and the efficiency of the biochemical processes.
- **Conclusion:** This statement is **correct**.

3. **Statement (iii): It is a completely automated tool.**
- **Analysis:** While many modern bioreactors have automated features, they still require human oversight and intervention for monitoring and maintenance. Therefore, they are not completely automated.
- **Conclusion:** This statement is **incorrect**.

4. **Statement (iv): It is a compact thermal cycler.**
- **Analysis:** A bioreactor is not a thermal cycler; it is a large vessel used for cultivating microorganisms. A thermal cycler is specifically used for processes like PCR (Polymerase Chain Reaction), which is different from the function of a bioreactor.
- **Conclusion:** This statement is **incorrect**.

### Final Conclusion:
Based on the analysis, the correct statements are (i) and (ii). Therefore, the correct answer is **Option A: 1 and 2**.

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