**Core Concept**
The disposal of microbial laboratory culture waste requires adherence to specific guidelines to prevent the spread of infection and contamination. The use of color-coded plastic bags is a widely adopted practice for segregating and disposing of biohazardous waste, including laboratory culture waste.

**Why the Correct Answer is Right**
The correct color code for disposing of microbial laboratory culture waste is Yellow. This color is designated for biohazardous waste, which includes cultures, stocks of infectious agents, and contaminated materials. The use of yellow bags helps to identify and segregate this type of waste, ensuring it is handled and disposed of appropriately. The yellow color serves as a visual warning to healthcare workers and waste management personnel, indicating the presence of biohazardous materials.

**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect, as Red is typically used for disposing of infectious or pathogenic materials that are highly contaminated or pose a significant risk of infection.
**Option B:** Incorrect, as Blue is often used for disposing of non-infectious or non-biohazardous waste, such as general laboratory waste or recyclable materials.
**Option C:** Incorrect, as Black or White is not a standard color code for disposing of microbial laboratory culture waste.

**Clinical Pearl / High-Yield Fact**
It's essential to note that the color coding system for biohazardous waste disposal may vary slightly depending on the institution or country. However, yellow is the universally recognized color for biohazardous waste, including microbial laboratory culture waste.

**Correct Answer: D. Yellow**