Which of the following statements regarding single cell protein are true?
I. It contains high quality fat and low protein content.
II. Fusarium graminearum is a yeast that produces SCP.
III. It reduces pressure on agricultural production system.
IV. Spirulina is a cyanobacteria which produces SCP.

Options

A. I and II
B. II and III
C. III and IV
D. I and IV

Answer

To determine which statements regarding single cell protein (SCP) are true, let's analyze each statement one by one:

1. **Statement I: It contains high quality fat and low protein content.**
- Single cell protein is derived from microorganisms, which are primarily composed of protein. In fact, SCP is known for its high protein content and low fat content. Therefore, this statement is **false**.

2. **Statement II: Fusarium graminearum is a yeast that produces SCP.**
- Fusarium graminearum is actually a type of fungus, not a yeast. The yeast commonly used for producing SCP is Saccharomyces cerevisiae. Hence, this statement is also **false**.

3. **Statement III: It reduces pressure on agricultural production system.**
- Single cell protein can indeed help alleviate the pressure on agricultural systems by providing an alternative source of protein that does not require extensive land, water, or resources to produce. This statement is **true**.

4. **Statement IV: Spirulina is a cyanobacteria which produces SCP.**
- Spirulina is indeed a type of cyanobacteria that is recognized for its high protein content and is used as a source of single cell protein. Therefore, this statement is **true**.

Based on the analysis:
- **True Statements**: III and IV
- **False Statements**: I and II

### Final Answer:
The true statements regarding single cell protein are III and IV.

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