Nuclear pore complex encases the nuclear pore, which facilitates translocation of macromolecules within the cell. A nuclear envelop possesses two concentric outer and inner layer that are fused with the NPCs. Both the phospholipid nuclear membranes are isolated by the perinuclear space in between. The nuclear membrane works as a selective barrier and also protects …
The solenoid model illustrates the packaging or folding of DNA within the eukaryotic cell nucleus. It was first introduced by the scientist’s named John Finch and Aaron Klug in the year 1976. In eukaryotes, the DNA is organized compactly by the association of bead-like histone octamer and linker histone, while in prokaryotes the DNA content …
A plant cell nucleus is a specialized structure, which stores the genetic information and monitors the cellular activities. Plants are the monokaryotic cells, which possess an individual nucleus. A well-developed nucleus is only found in the advanced or multicellular organisms, those having division of labour. The number of the nucleus varies among different groups of …
The difference between induction and repression of operon is mainly due to the following factors: Regulation: The operon system in prokaryotes regulate the expression of enzymes necessary to turn on or off the metabolic pathway. The regulatory gene of inducible operon forms an active repressor protein, whose binding affinity towards the operator region is mediated …
The life cycle of Achyla species involves asexual or sexual modes of reproduction. The genus Achyla includes approximately 47 species and belongs to the group of oomycetes or water mould. Few species of Achyla are phytopathogens like Achlya conspicua and Achlya klebsiana. Most of the Achyla species are aquatic, while few grow on damp soil. …
Tryptophan operon is found within the genome of E.coli that carries a set of genes for the construction of an essential amino acid tryptophan. Sometimes, it also termed as trp operon. Unlike lac or lactose operon, trp operon is a kind of repressible system that we will discuss in this article. A scientist named Charles …
Nutrient agar is a standard media that is used for growing and isolating of a broad class of microorganisms. It is the most popular media that are generally available in all laboratories for enumeration of different bacteria and their maintenance. The enumeration of different bacteria from different samples like soil, water, sewage, food etc. can …
Late blight in potato is a plant disease caused by the pathogenic fungus, Phytophthora infestans. It is a potentially devastating disease that primarily found in potatoes but can also be seen in the members of the Solanaceae family, including tomatoes, petunias and hairy nightshade etc. Phytophthora infestans is a plant pathogen, which can severely affect …
The difference between cofactor and coenzyme is mainly due to the following factors: Chemical nature: Cofactors constitutes a large group of helper molecules that can be inorganic and organic, while cofactors are simply the small, organic molecules. Function: Coenzymes significantly acts as a carrier material to convert the inactive protein (Apoenzyme) into the active form …
The fluorescence microscopy makes the use of fluorescence mechanism to generate an image and optical sectioning for the high resolution. It is available in different designs. The most common and simple set-up in use is epifluorescence microscopes, while confocal microscope has a sophisticated set-up. Epifluorescence microscope is commonly used in different laboratories that allows excitation …