Semi Log of per minute growing bacteria is plotted against time. What will be the shape graph?
A. Ascending straight line
B. Sigmoid
C. Hyperbolic
D. Descending straight line

Hint: In biology and biological engineering, the change in numbers of microbes due to asexual reproduction and nutrient exhaustion is commonly represented by semi-log plot. The logarithm of the number or mass or other microbes as dependent variable with the time as independent axis.

Complete answer:
There are four phases in the bacterial growth, the log phase, the exponential phase, the stationary phase and the death phase. In the log phase, bacteria start to grow in a limited population. In the exponential phase, the bacteria start to exponentially multiply and increase in their population to a peak level. After attaining a peak in the bacterial population, it comes to a stationary phase in which the population remains stable. Then, comes the death phase when the population of the bacteria starts reducing and decreasing to a significant level.
Ascending straight line is a graphical representation of increase in growth of bacteria per unit time.
Sigmoid is a graphical representation of the bacterial growth or the growth of an organism without any other factor involved.
Hyperbolic is a graphical representation of the population of an organism with respect to the environmental factors on enzymes.
Descending straight line is a graphical representation of decrease in the growth of the organism.

Hence, the correct option is A. Ascending straight line.

Note: The graph represents the growth of bacteria per unit time. This helps us to know the speed of growth of the bacteria as time is represented by Y-axis and population of bacteria is represented by X-axis.