During aerobic respiration, pyruvic acid formed after glycolysis gets converted into (i)______ while during anaerobic respiration, it is converted into (ii)_________

Options

A. i-acetyl-Co-A, ii-lactic acid
B. i-2-phosphoglycerate, ii-succinic acid
C. i-2-phosphogllycerate, ii-lactic acid
D. i-acetyl-Co-A, ii-succinic acid

Answer

To solve the question regarding the conversion of pyruvic acid during aerobic and anaerobic respiration, we can break it down into two parts:

### Step-by-Step Solution:

1. **Understanding Aerobic Respiration**:
- In aerobic respiration, pyruvic acid, which is produced from glycolysis, is converted in the presence of oxygen.
- The pyruvic acid is transformed into acetyl-CoA. This conversion occurs in the mitochondria before entering the citric acid cycle (Krebs cycle).

2. **Understanding Anaerobic Respiration**:
- In anaerobic respiration, which occurs in the absence of oxygen, pyruvic acid undergoes a different pathway.
- Pyruvic acid is converted into lactic acid (in animals) or ethanol and carbon dioxide (in yeast and some plants). In this case, we will focus on lactic acid as it is the most common product in human muscle cells during anaerobic conditions.

3. **Final Answer**:
- Therefore, during aerobic respiration, pyruvic acid is converted into **(i) acetyl-CoA**, and during anaerobic respiration, it is converted into **(ii) lactic acid**.

### Summary of the Answer:
(i) acetyl-CoA
(ii) lactic acid