Microbiology is the study of :
Microbiology is the study of all living organisms that are too small to be visible with the naked eye. This includes bacteria, archaea, viruses, fungi, prions, protozoa and algae, collectively known as 'microbes'.
What did Leeuwenhoek observe in a drop of pond water?
Leeuwenhoek observed large number of living microorganisms in a drop of water when observed under microscope. These organisms are not visible by naked eyes
The bacterium present in curd is:
Lactobacillus is the microorganism present in curd. This bacterium converts milk into curd at 30 to 40oC.
Rhizobium is a bacteria found in soil that helps in fixing nitrogen in leguminous plants. It attaches to the roots of the leguminous plant and produces nodules. These nodules fix atmospheric nitrogen and convert it into ammonia that can be used by the plant for its growth and development.
_______ are the agents that act as carriers of a pathogen and spread diseases.
Animals or insects carry infecting agents from a sick person to another potential host. These animals are thus the intermediaries and are termed as vectors. The most common vectors are mosquitoes.
Which one of the following is not a method of food preservation?
This process is less effective in food preservation than are thermal techniques such as boiling because pathogens are more likely to be able to survive cold temperatures than hot temperatures.
The microorganism which helps in fermentation is :
Fermentation is the process in which yeasts convert sugar into ethanol in the absence of oxygen. The fermentation process is used to produce alcoholic beverages.
Agents in infectious diseases responsible are called
There are five major types of infectious agents: bacteria, viruses, fungi, protozoa, and helminths. In addition, a new class of infectious agents, the prions, has recently been recognized. A brief review of the general characteristics of each of these agents and examples of some diseases they cause follows.
Which two words are synonyms?
Microorganism and microbe are two words having same meaning, very small organisms that cannot be seen with naked eyes. So, microorganism and microbe are synonyms.
A plant disease called citrus canker is caused by a _________ .
Citrus canker is a plant disease caused by bacteria. It’s mode of transmission is through air.