Read the following four statements (A-D) :-
(A) Thermal stability is an important quality of enzymes which are isolated from thermophilic organisms.
(B) Formation of Enzyme substrate complex, during enzyamtic reaction, is an facultative phenomenon.
(C) Enzymes bring down the energy barrier between substrate and transition state to make the transition of substrate to product easy.
(D) The essential chemical components of many coenzymes are proteins and viatmins.
How many of the above statements are right ?

Options

A. Four
B. One
C. Two
D. Three

Answer

To determine how many of the provided statements (A-D) are correct, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Statement A**: "Thermal stability is an important quality of enzymes which are isolated from thermophilic organisms."
- **Analysis**: This statement is correct. Enzymes from thermophilic organisms are adapted to function at high temperatures and exhibit thermal stability, which is crucial for their activity in extreme environments.

2. **Statement B**: "Formation of Enzyme substrate complex, during enzymatic reaction, is a facultative phenomenon."
- **Analysis**: This statement is incorrect. The formation of the enzyme-substrate complex is an obligate phenomenon, meaning it is essential for the enzymatic reaction to occur. Without this complex, the reaction cannot proceed.

3. **Statement C**: "Enzymes bring down the energy barrier between substrate and transition state to make the transition of substrate to product easy."
- **Analysis**: This statement is correct. Enzymes lower the activation energy required for a reaction, facilitating the conversion of substrates to products by stabilizing the transition state.

4. **Statement D**: "The essential chemical components of many coenzymes are proteins and vitamins."
- **Analysis**: This statement is partially correct but misleading. Coenzymes are primarily derived from vitamins (which are organic compounds) and do not typically include proteins as essential components. Therefore, this statement is incorrect.

### Conclusion:
- **Correct Statements**: A and C are correct.
- **Incorrect Statements**: B and D are incorrect.
- **Total Correct Statements**: 2

Thus, the answer to the question is that **2 statements are correct**.