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What Is Selective Media? Selective media refer to a type of growth media that allows the growth of selected microorganisms in the medium. Selective media are formulated to contain ingredients that inhibit the growth of selected species or categories of bacteria while allowing other organisms to grow. These formulations may include antibiotics which inhibit the … Read more
In bioinformatics, the comparison and alignment of biological sequences is very important. From understanding the genetic codes that define life to identifying functional domains and conserved regions. The process of alignment involves pairing two or more sequences to discover their similarities, differences, and evolutionary relationships. Global Sequence Alignment seeks to find the best alignment of … Read more
Hypothesis testing is the art of testing if variation between two sample distributions can just be explained through random chance or not. Anytime we make a decision using statistics there are four possible outcomes, with two representing correct decisions and two representing errors. The errors are generally classified as type I and Type II errors. … Read more
Light Reaction Process The light reaction of photosynthesis. The light reaction occurs in two photosystems (units of chlorophyll molecules). Light energy (indicated by wavy arrows) absorbed by photosystem II causes the formation of high-energy electrons, which are transferred along a series of acceptor molecules in an electron transport chain to photosystem I. Photosystem II obtains … Read more
The gastropods commonly referred to as snails and slugs belong to the group of soft-bodied animals referred to as mollusks which also includes oysters, octopus, cuttlefish, clams and squid. There are about 60,000 species of snails and slugs with varying shades of color. Both Slugs and snails thrive in damp soil or plant debris, and … Read more
What Is Complete Metamorphosis? Complete metamorphosis refers to change in anatomical and physiological form through a series of life stages. Complete metamorphosis begins with the insect hatching from an egg into a soft worm-like shape called a larva. Larvae have a very big appetite and can eat several times their own body weight every day. If humans did the … Read more
In terrestrial plants, Xylem is the vascular tissue that plays a role in conduction of water and nutrients from the roots to the shoots and leaves. A xylem can be classified as either primary or secondary based on the stage and origin of growth. Primary xylem is a type of xylem that forms during primary … Read more
BASIS OF COMPARISON SIMPLE STAINING DIFFERENTIAL STAINING Description This method uses only one stain. This method uses more than one stain. Colors It imparts only one color to all bacterial cells. It imparts two or more colors to bacterial cells. Importance It reveals the size, shape and arrangement of bacterial cells. It reveals the size, … Read more
Globular Proteins Globular proteins also referred to as spheroproteins are the most abundant proteins in nature. Globular proteins have a 3D molecular structure that has a shape that is anywhere from a sphere to a cigar. Usually the structure of a globular protein is divided into three or four levels. The primary structure is simply … Read more
Ligand field theory, in chemistry, one of several theories that describe the electronic structure of coordination or complex compounds, notably transition metal complexes, which consist of a central metal atom surrounded by a group of electron-rich atoms or molecules called ligands. The ligand field theory deals with the origins and consequences of metal– ligand interactions as a means of elucidating the magnetic, optical, and chemical … Read more