Definition

Virus – Structure, Origin, Replication, Classification, and Example

39 min readby
Anaerobic Respiration

What are Viruses? Origins of Viruses Viruses have likely existed since the earliest life forms and have evolved alongside cellular organisms. Due to their lack of fossil records, the origins of viruses remain unclear, and scientists use molecular biology techniques to explore their evolutionary history. Three primary hypotheses attempt to explain how viruses may have … Read more

Plant Tissue Culture – Definition, techniques, Media composition, types, application.

48 min readby
Plant tissue culture

What is Plant Tissue Culture? Plant tissue culture Definition Plant tissue culture is a biotechnology technique that involves growing plant cells, tissues, or organs in a controlled, sterile environment on a nutrient medium. This method exploits the totipotency of plant cells, allowing for the rapid propagation of plants, production of disease-free specimens, and conservation of … Read more

Prions – Definition, Structure, Replication, Function, Disease

3 revisions 28 min readby
Prions Disease: Definition, Structure, Prevention, Control, Treatment, Transmission.

What are Prions? Definition of Prion A prion is an infectious, misfolded protein that causes neurodegenerative diseases by inducing abnormal folding of normal cellular proteins, leading to the accumulation of these misfolded proteins in the brain. Unlike other infectious agents, prions lack nucleic acids and propagate their abnormal structure through direct protein-protein interactions. Characteristics of … Read more

Serial Dilution Method – Definition, Procedure, Application

40 min readby
Serial Dilutions and Plating Procedure

What is a serial dilution? Serial dilution definition Serial dilution is a methodical process in which a solution is diluted sequentially to produce a series of progressively reduced concentrations. What is the purpose of serial dilution? – Serial Dilution Objectives Serial dilution serves as a foundational procedure in numerous scientific disciplines, especially microbiology. The primary … Read more

Oxidase Test – Definition, Principle, Procedure, Result, Application

9 min readby
Oxidase Test Definition, Principle, Procedure, Result, Application

The oxidase test is a biochemical reaction that assays for the presence of cytochrome oxidase, an enzyme sometimes called indophenol oxidase. In the presence of an organism that contains the cytochrome oxidase enzyme, the reduced colorless reagent becomes an oxidized colored product .

Tollens’ Test Definition, Principle, Procedure, Result, Application.

4 min readby
Tollens’ Test Definition, Principle, Procedure, Result, Application.

It is a type of biochemical test which is used to distinguish reducing sugars from non-reducing sugars. This biochemical test is also known as the silver mirror test based on the end product of this test. This test was also used to differentiate between aldehydes and ketones through routine qualitative organic analysis.

Paramecium Cell Definition, Characteristics, Classification, Movement, Diagram.

21 min readby
Paramecium Cell Definition, Characteristics, Classification, Movement, Diagram.

What is Paramecium? Definition of Paramecium Paramecium is a microscopic, single-celled organism with hair-like structures called cilia, found in various aquatic environments, often studied for its role as a model organism in biological research. Paramecium Scientific classification Paramecium is divided into this following phylum and subphylum; Domain: Eukaryota Clade: SAR Infrakingdom: Alveolata Phylum: Ciliophora Class: … Read more

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