What is serial dilution method? And how to calculate?

serial dilution method

Introduction Serial dilution is a microbiological process where a substance is stepwise diluted in a solution. This serial dilution method is a technological method that is used in the isolation of microorganisms. There are two types of dilution. Simple dilution Serial dilution. Below is a discussion of what the serial dilution method is and how … Read more

What is prokaryotic DNA

Prokaryotic DNA

Know in one minute about prokaryotic DNA   The prokaryotic DNA found in the cytoplasm is usually circular and present in fewer amounts. It is naked without histone protein. It exists as single chromosome  Apart from that additional plasmid DNA is also present. The compact mass of DNA is called the nucleoid. Non-coding introns absent with … Read more

Electron microscope: Definition and types

Electron microscope

Introduction Microscopy helps us to understand or gives access to see the direct images of various tissues, organisms, organelles, microorganisms, molecular assemblies, and proteins. It is an important, complementary technique to visualize the macro and/or microscopic structure and to assign structure to function and vice versa.  The discovery of an electron microscope was not sudden, … Read more

Scanning electron microscope (SEM): Structure and description

Scanning electron microscope

Introduction A microscope is used to see objects that are not visible to the naked eye. The electron microscope is a breakthrough invention in microbiology. It is of two types based on its structure such as transmission electron microscope and Scanning electron microscope (SEM). This microscope accurately describes the smallest part of an object. After … Read more

Gram-positive and Gram-negative bacteria: Difference

gram-positive and gram-negative bacteria

Introduction Microorganisms are categorized under bacteria, viruses, fungi, and mycoplasma. Some of the microorganisms are disease-causing some are saprophytes or some are heterotopic in nature. Bacteria are cosmopolitan, unicellular, rigid cell walled, prokaryotic microorganisms. They are simple in structure cause diseases in plants and animals. The following article is about gram-positive and gram-negative bacteria and … Read more

Are viruses living or not? Origin and properties

are viruses living or not ?

Are viruses living or not? is a very question to understand. Virus has attributes of both living organisms and nonliving objects. Thus it can be considered as both living and nonliving Origin of Virus There are two main views on the origin of the virus A. I. Oparin suggested that complex molecules of different organic … Read more

Virus difference: animal, plant, & bacteriophage

virus difference

Difference between animal, plant virus, and bacteriophage Viruses are very small even smaller than bacteria and are mainly parasitic in nature. Depending upon the host, they are widely categorized under three different types namely animal, plant viruses, and bacteriophage. Although all of them have basic similarities depending on the host type and genetic material these … Read more

Types of viruses: structure, classification and reproduction

virus types

Introduction There is no nomenclature system for virus classification since they are not considered truly living. As we all know that living organisms have a definite cellular structure. That raises an interesting question of what actually viruses are. And what are the types of viruses and their structure? Viruses are named according to the type … Read more

Types and simple definition for viruses and structure

virus definition

Virus definition In Latin, the word virus means poisonous or venomous fluid coined by Dmitri Ivanowsky (1892). He recognized certain microbes causing mosaic diseases of tobacco are smaller than that of bacteria. These are very very minute submicroscopic biological entities. Thus, definition for viruses is that it does not have any cellular organelles but definitely … Read more