An auxotroph is a (an):

Options

A. Plant capable of synthesising own carbohydrates
B. Plant showing quick bending response to sunlight
C. A mutant having lost the ability to synthesisie one or more nutrients
D. An organism dependent on another for nutritional requirements

Answer

**Step-by-Step Solution:**

1. **Understanding the Term "Auxotroph":**
- An auxotroph is a type of mutant organism that has lost the ability to synthesize one or more essential nutrients that the wild-type (parent) organism can produce.

2. **Analyzing the Options:**
- **Option A:** "A plant capable of synthesizing its own carbohydrates."
- This describes autotrophs, not auxotrophs.
- **Option B:** "A plant showing quick bending response to sunlight."
- This refers to phototropism, which is unrelated to auxotrophs.
- **Option C:** "A mutant having lost the ability to synthesize one or more nutrients."
- This accurately describes an auxotroph.
- **Option D:** "An organism dependent on others for nutritional requirements."
- This describes heterotrophs, which is also not correct for auxotrophs.

3. **Identifying the Correct Answer:**
- After analyzing all options, the correct answer is **Option C:** "A mutant having lost the ability to synthesize one or more nutrients."

4. **Conclusion:**
- Auxotrophs are significant in genetics and microbiology as they help in understanding metabolic pathways and nutritional requirements of organisms.