139 results found

Search Results for: virus

Naked virus

Viruses are infectious entities with size ranges between 20 to 400 nanometers. The mammoth-sized virus would be about the... Read More

Biological Viruses

The prime directive of all organisms is to reproduce and survive and this also applies to viruses. Apparently, viruses are... Read More

Virus

Definition noun, plural: viruses A submicroscopic infectious agent that is unable to grow or reproduce outside a host... Read More

Tobacco mosaic virus

Definition noun, plural: tobacco mosaic viruses A mosaic virus belonging to genus Tobamovirus that causes mottling and... Read More

coronavirus COVID-19

Coronavirus Disease 2019 (COVID-19) Coronavirus Disease 2019 (COVID-19) is a contagious coronavirus disease first detected... Read More

Capsid

Capsid Definition A capsid is a three-dimensional proteinaceous capsular shell around a virus that encloses the viral... Read More

DNA virus

Definition noun A virus containing DNA as its genetic material and using a DNA-dependent DNA polymerase during... Read More

RNA virus

Definition noun A virus containing RNA as its genetic material. The RNA may be single stranded or double stranded. Examples... Read More

Retrovirus

Definition noun, plural: retroviruses Any of the group of viruses in the family Retroviridae. The virus is characterized by... Read More

Yellow fever virus

Definition noun, plural: yellow fever viruses A Flavivirus species containing positive-sense, single-stranded RNA with about... Read More

SsRNA-RT virus

Definition noun, plural: ssRNA-RT viruses Single-stranded RNA virus with a positive sense, single stranded RNA genome but... Read More

Single stranded DNA virus

Definition noun Any of the viruses belonging to the Class II of Baltimore classification system characterized by having a... Read More

Double stranded DNA virus

Definition noun Any of the viruses belonging to the Class I of Baltimore classification system characterized by having a... Read More

Temperate virus

Definition noun A virus that does not cause immediate lysis following entry to its host but remains in a latent state,... Read More

Incubation period

Incubation Period Definition The incubation period is the time duration between exposure to the pathogen and the appearance... Read More

Host cell

Host Cells Definition What is a host cell? A host cell is a living cell that serves as a shelter and a food source to the... Read More

Visna maedi virus

Visna maedi virus (Science: virology) A retrovirus of sheep and goats. A member of the lentivirus subfamily related to... Read More

Virulent virus

Definition noun A virus that lyses its host immediately upon infection and often cause disease Supplement Viruses may be... Read More

Intermediate host

Intermediate Host Definition When looking at the relationships amongst different biological members of our biosphere, we... Read More

Chimera

When we learned about the basic genetics of biological life, we came to know that almost all the cells of an individual have... Read More

Chickenpox

Definition noun A highly contagious air-borne disease caused by varicella zoster virus commonly affecting children and... Read More

Hiv

Hiv --> <a href="https://www.biologyonline.com/dictionary/human-Immunodeficiency">virus (Science: virology) a... Read More

Plaque assay

Definition noun An assay used for virus isolation and purification, and to determine viral titers. Supplement The plaque... Read More

Provirus

provirus (Science: virology) The genome of a virus when it is integrated into the host cell dNA. In the case of the... Read More

Lytic cycle

Definition noun One of the two cycles of viral reproduction (the other being the lysogenic cycle), which is usually... Read More

Virulence

Virulence Definition In biology, virulence is defined as the degree to which a pathogenic organism can cause disease.... Read More

Hepatitis E in Europe — are pigs or pork the problem?

Hepatitis E in Europe -- are pigs or pork the problem? Hepatitis E virus infections can be fatal in pregnant women, but... Read More

Symbiosis

Symbiosis Definition What is symbiosis? Symbiosis can be defined as any kind of relationship or interaction between two... Read More

Cell adhesion

Cell Adhesion Definition Cell adhesion is the process in which a cell uses a specialized complex of proteins to get... Read More

Plaque-forming unit

Definition A measure of the quantity of individual infectious particles (e.g. virus particles) based on the number of... Read More

Mosaic disease

Definition noun An infectious disease in plants characterized by the speckled appearance in leaves due to mottling and... Read More

Silent mutation

A mutation is a change in the nucleotide sequence of a gene or a chromosome. When there is only one nucleotide involved, it... Read More

Viability

Whether we talk about “a travel plan” or “a science experiment” or “the chances of a pregnancy reaching its... Read More

Lysogenic cycle

Lysogenic cycle (Science: virology, microbiology) One of the ways of virus reproduction. ( other one:lytic... Read More

Survival of the fittest

When we talk about evolutionary processes, the usage of the phrase "Survival of the fittest" has been very common in... Read More

Degenerative disease

A degenerative disease is defined as a disease characterized by the worsening condition due to the deterioration of the... Read More

Inoculation

Inoculation Definition In Immunology, inoculation is defined as the process of introducing an antigenic substance or... Read More

Single-stranded DNA

What is single-stranded DNA? DNA is the material that living organisms possess that carries their genetic make-up. DNA and... Read More

Transactivation

Definition noun, plural: transactivations (molecular biology, genetics) The stimulation of transcription by expressing an... Read More

Diploid

Diploid Definition Let's first understand the meaning of the word - diploid. From the words ‘di’, meaning "two", and... Read More