The growth curve of bacterial population is lab is plotted against time. What will be the shape of graph ?

Options

A. sigmoid
B. hyperbolic
C. ascending straight line
D. desending straight line

Explanation

To solve the question regarding the shape of the growth curve of a bacterial population plotted against time, let’s break it down step by step:

### Step 1: Understand Bacterial Growth Phases
Bacterial growth in a lab setting typically follows a specific pattern characterized by several phases:
- **Lag Phase**: This is the initial phase where bacteria adapt to the new environment. There is little to no cell division during this phase.
- **Log Phase (Exponential Phase)**: In this phase, bacteria begin to divide at a constant and rapid rate, leading to exponential growth.
- **Stationary Phase**: Growth slows as the nutrients become limited and waste products accumulate. The number of new cells created is roughly equal to the number of cells dying.
- **Decline Phase (Death Phase)**: Nutrient depletion and toxic accumulation lead to a decrease in the bacterial population.

### Step 2: Identify the Shape of the Growth Curve
When plotted against time, the growth curve of bacterial populations in a lab setting typically exhibits a **J-shaped curve** during the log phase, which is hyperbolic in nature. This indicates rapid growth during the exponential phase.

### Step 3: Conclusion
Thus, the overall shape of the growth curve of a bacterial population in a lab, when plotted against time, is **hyperbolic** due to the exponential growth observed during the log phase.

### Final Answer:
The shape of the graph representing the growth curve of bacterial population in the lab is **hyperbolic**.

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