Cells perform the essential life functions in an animal body. Which of the following functions is not performed by animal cells?

Options

A. Digestion
B. Respiration
C. Protein synthesis
D. Carbohydrate synthesis

Answer

To determine which function is not performed by animal cells, we will analyze each of the given options step by step.

### Step 1: Understand the functions of animal cells
Animal cells are responsible for various essential life functions, including digestion, respiration, protein synthesis, and carbohydrate synthesis. We need to identify which of these functions is not performed by animal cells.

### Step 2: Analyze each option
1. **Digestion**: This function is performed by lysosomes in animal cells. Lysosomes contain enzymes that break down waste materials and cellular debris. Therefore, this function is performed by animal cells.

2. **Respiration**: This function is carried out by mitochondria, which are known as the powerhouses of the cell. They convert nutrients into energy through cellular respiration. Hence, this function is also performed by animal cells.

3. **Protein Synthesis**: This process occurs in the rough endoplasmic reticulum (RER) and ribosomes. Animal cells are capable of synthesizing proteins, so this function is performed by animal cells as well.

4. **Carbohydrate Synthesis**: Unlike plants, animal cells do not have the ability to synthesize carbohydrates through photosynthesis. While they can store carbohydrates (like glycogen), they do not synthesize them in the same way that plant cells do.

### Step 3: Identify the correct answer
Based on the analysis, the function that is not performed by animal cells is **carbohydrate synthesis**. Therefore, the correct answer is option 4.

### Final Answer:
The function that is not performed by animal cells is **carbohydrate synthesis**.

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