47 results found

Search Results for: helical

Capsid

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

Flagellum

Flagellum Definition Flagellum is a slender, hair-like structure composed of a complex arrangement of multiple proteins,... Read More

Deoxyribonucleic acid

Deoxyribonucleic Acid (DNA) Definition A nucleic acid refers to any of the group of complex compounds made up of linear... Read More

Microfilament

Definition noun plural: microfilaments mi·cro·fil·a·ments, mī'krō-fil'ă-mĕnts A thin, helical, single-stranded... Read More

Iodine test

Iodine Test Definition The iodine test is a chemical reaction-based identification test for starch. In this test, iodine... Read More

Keratin

Keratin is a fibrous protein naturally present in hair, skin, and nails. In hair care, it serves as a protective and... Read More

Thin filament

Definition noun, plural: thin filaments A type of myofilament that is made up of actin, troponin, and tropomyosin molecules,... Read More

Chromosome

Chromosomes Definition Chromosomes are thread-like structures present in the nucleus of plant and animal cells. Chromosomes... Read More

Myocardium

Myocardium Definition What is the myocardium of the heart?  It is the muscular middle layer of the heart that is... Read More

Chargaffs rules

Definition noun The rules proposed by an Austro-Hungarian biochemist, Erwin Chargaff, implicating that the double helical... Read More

Cytoskeleton

Definition noun plural: cytoskeletons cy·to·skel·e·ton (cell biology) The lattice or internal framework of a cell... Read More

Replication

Replication, in the general sense, is to create a copy or a duplicate. Thus, in biology, replication is commonly associated... Read More

Nucleosome

Nucleosome Definition Every organism is made of deoxyribonucleic acid, also known as DNA. DNA is made up of numerous... Read More

Precursor mRNA

Definition noun plural: precursor mRNAs An immature or incompletely processed mRNA molecule in eukaryotes that needs to be... Read More

Mature mRNA

Mature mRNA Definition Mature mRNA is the completely processed mRNA molecule in the cell of eukaryotes. The mRNA is a type... Read More

Cell morphology

The basic essence for any living organism is its structural framework which includes appearance, form, and the... Read More

Hydrogen bond

Definition noun plural: hydrogen bonds A type of chemical bond that is formed when the slightly positive hydrogen atom of... Read More

Biuret test

In this article we will answer the following three questions: What is a Biuret Test?  What does biuret test for? What is... Read More

Cell matrix

Definition noun plural: cell matrices cell ma·trix, ˈmeɪtɹɪks An insoluble, dynamic gel in the cytoplasm, believed... Read More

Erwin Chargaff

Quick Info (person) A biochemist known for his proposed Chargaff's rules that led to the discovery of the double helical... Read More

Polynucleotide

Definition noun plural: polynucleotides pol·y·nu·cle·o·tide, ˌpɒlɪˈno͞o′klē-ə-tīd A biopolymer comprised of... Read More

Intermediate filament

Definition noun plural: intermediate filaments A type of cytoskeleton characterized by having a diameter ranging from 8... Read More

DNA Structure & DNA Replication

Previous pages in this tutorial have described the basics of a cell, the energy required by these cells and how energy is... Read More

A Protein Being Born – a live cell imaging of RNA translation

You probably already heard the concepts of translation in the central dogma of molecular biology. The dogma is an... Read More

How cell fixes DNA damage

DNA repair strategies DNA is crucial to life. It carries the fundamental blueprint for the proper functioning of a cell.... Read More

Recombination DNA repair

Recombination DNA Repair Definition Recombination DNA repair is a biological reparative process in response to DNA damage... Read More

Inherited traits

What are Inherited Traits? The characteristics or traits that are passed from parents to offspring are known as inherited... Read More

Compound

Definition noun plural: compounds com·pound, ˈkɒmpaʊnd (general) A material made up of two or more parts or... Read More

Ribonucleic acid

Ribonucleic Acid Definition noun (uncountable), ribonucleic acids ri·bo·nu·cle·ic ac·id, raɪboʊnjuːkliːɪk... Read More

Eukaryotic cells

Eukaryotic Cells Definition What is a eukaryotic cell? Eukaryotic cells refer to the cells of (or derived from) eukaryotes,... Read More

Tissue

Tissue Definition What is tissue in the body? The body tissue is an aggregation of cells that function together and have a... Read More

Eubacteria

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

Domain

Definition noun, plural: domains (1) (taxonomy) The highest taxonomic rank of organisms in which there are three groupings:... Read More

Conjugation

Conjugation generally means the joining or coming together (union), such as in certain unicellular organisms (some bacteria,... Read More

A layer

A layer (Science: molecular biology) right handed double helical dna with approximately 11 residues per turn. Planes of base... Read More

Glycogen

Definition noun plural: glycogens gly·co·gen, glī′kə-jən A multi-branched polymer of glucose, mainly produced in... Read More

Nucleic acid

Nucleic Acid Definition A nucleic acid refers to any of the group of complex compounds consisting of chains of monomers of... Read More

Tropomyosin

Definition noun A long protein strand composed of two fully alpha helical chains in a coiled-coil dimmer, and binds along... Read More

Microtubule

Microtubule Definition noun plural: microtubules mi·cro·tu·bule, mī'krō-tū'byūl A cytoplasmic tubule made up of... Read More

Ectoplasm

Definition Of Ectoplasm The peripheral part of the cytoplasm which is clear, gel-like, rigid, and agranular part is known... Read More