List of top Environmental Microbiology Questions on Microbiology

The microorganism mainly responsible for nitrification in soil is:

The kinematic viscosity of glycerin and kerosene are 1.2 times and 0.95 times of that of water, respectively. Glycerin and kerosene flow through two identical porous media having same hydraulic gradient. Assuming Darcy’s law is valid for the porous media, the ratio of flow rate of kerosene to that of glycerin is:

For an exponentially growing microbial culture, the specific growth rate $(\mu)$ is related to its doubling time $(t_d)$ by which one of the following relations?