31 results found

Search Results for: protein coat

Protein coat

Definition noun (virology) A coat of proteins surrounding the nucleic acid of a virus Supplement The protein coat is made up... Read More

Capsid

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

Naked virus

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

Multiple alleles

Alleles are the pairs of genes occupying a specific spot called locus on a chromosome. Typically, there are only two alleles... Read More

Subunit

Definition noun, plural: subunits (general) A subdivision or a distinct component of a larger unit Supplement The word... Read More

Dominant

Dominant Definition The word dominant or dominant trait is commonly used in biology. The general meaning of dominant is to... Read More

Pinocytosis

Pinocytosis Definition What is pinocytosis?  Pinocytosis is the ingestion of extracellular fluids, i.e. the fluid... Read More

Endocytosis

Endocytosis Definition What is endocytosis in biology? Endocytosis is a cellular process by which a cell internalizes any... 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

Bacteriophage

Definition noun, plural: bacteriophages A virus capable of infecting a bacterial cell, and may cause lysis to its host... Read More

Eubacteria

Eubacteria are prokaryotic microorganisms consisting of a single cell lacking a nucleus and containing DNA is a single... Read More

Cell membrane

Cell Membrane Definition Just like any non-living body possesses a plastic or paper packaging material that keeps the... Read More

Mutagen

Mutagen Definition What is a mutagen? A mutagen is a substance or agent that causes DNA impairment that results in the... Read More

Codominance

Codominance Definition Codominance is a form of inheritance wherein the alleles of a gene pair in a heterozygote are fully... Read More

Sarcolemma

Sarcolemma Definition What is the sarcolemma? It is the thin, transparent, extensible plasma membrane of the muscle cell.... Read More

Obligate parasite

Parasitism is a form of symbiosis that occurs between a parasite and its host. The parasite is the organism that generally... Read More

Bacteria

Bacteria Definition What are bacteria? What is the definition of bacteria in biology? Bacteria are defined as organisms... Read More

Epidermis

Epidermis Definition What is the epidermis? We can define the epidermis as one or more layers of cells forming the tough... Read More

Antigen

Antigen Definition What is an antigen? A simple definition is that an antigen refers to any substance that triggers an... Read More

Prokaryote

Prokaryote refers to any of the group of living organisms primarily characterized by the lack of a true nucleus and other... Read More

Glycocalyx

What is the Glycocalyx? The glycocalyx is a polysaccharide-based gel-like, highly hydrous cellular thin layer, covering... Read More

Elaioplast

Definition noun, plural: elaioplasts (botany) A leucoplast that stores oil Supplement Plastids are organelles involved in... 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

Incomplete antibody

Incomplete antibody --> univalent antibody An incomplete form of antibody that may coat antigen, but which according to... Read More

Non-Mendelian Inheritance

Reviewed by: Mary Anne Clark, Ph.D. The inheritance patterns seen in Mendel's monohybrid and dihybrid crosses... Read More

Biological Cell Defense

Organisms must find a means of defense against antigens such a viruses described on the previous tutorial. If this was not... Read More

Pleiotropy

Pleiotropy Definition When one single gene starts affecting multiple traits of living organisms, this phenomenon is known... Read More

Agglutination

Agglutination Definition What does agglutination mean? It generally refers to the process of sticking together or the... Read More

Coated vesicles

Coated vesicles vesicles formed when cell-membrane coated pits (coated pits, cell-membrane) invaginate and pinch off. The... Read More

Virus

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

Spermatid

Spermatid Definition What are spermatids? Let us define spermatid and understand its role in reproduction. A spermatid... Read More