SCIENCE

What Is Lone Pair? When two elements of a pair are joined together with the surface contact between them, the joint is referred to as lower pair. Area of two elements comes together when relative motion occurs between the elements to form a lower pair e.g nut and screw, universal joint used to connect two … Read more

Light Waves Light travels as waves. Light waves don’t always require particles to travel through. They can also travel through outer space or a vacuum. Light waves travel in straight lines. You can detect them with your eyes and also with instruments such as camera. They are reflected by mirrors and change direction when they … Read more

What Is An Atom? An atom is the smallest unit of matter that retains all of the chemical properties of an element. Every solid, liquid, gas and plasma is composed of neutral or ionized atoms. An atom is composed of two regions the nucleus which is in the center of the atom and contains protons … Read more

Markovnikov Rule In organic chemistry, Markovnikov ‘s rule also referred to as Markownikoff’s rule describes the outcome of some addition reactions. The rule was formulated by Russian chemist Vladimir Markovnikov in 1870. The rule states that, with the addition of a Protic acid HX (X=Cl, Br, I) to an asymmetric alkene, the acid hydrogen (H) … Read more

DNA Polymerase I (Pol I) DNA polymerase I (or Pol I) is an enzyme that participates in the process of prokaryotic DNA replication. Discovered by Arthur Kornberg in 1956, it was the first known DNA polymerase (and the first known of any kind of polymerase). It was initially characterized in E. coli and is ubiquitous in prokaryotes. In E. coli and many other bacteria, the gene that encodes Pol I is known … Read more

What Are Nitrates? A nitrate is any member of either of two classes of compounds derived from nitric acid, HNO3– and a positive ion such as NH4+. Nitrates are common components of fertilizers and explosives. Examples of nitrates include: Potassium nitrate KNO3) Sodium nitrate (NaNO3) Ammonium nitrate ( NH4NO3) etc. What You Need To Know … Read more

Telescope A telescope is an optical instrument using lenses, curved mirrors or a combination of both to observe distant objects or various devices used to observe distant objects by their emission, absorption or reflection of electromagnetic radiation. A telescope objective is designed to capture light from something far away, so the light arriving is nearly … Read more

Atomic Orbitals An atomic orbital is a mathematical function describing the location and wave-like behavior of an electron in an atom. This function can be used to calculate the probability of finding any electron of an atom in any specific region around the atom’s nucleus. The term atomic orbital can also to the physical region … Read more

Specular/Regular Reflection In regular reflection, all the light that falls on the reflecting surface is reflected in a definite direction.  It is produced on smooth surfaces like mirror, highly polished surfaces. Regular reflection can appear much brighter than diffuse reflections when seen from a large distance, because the reflected light is concentrated in a definite … Read more

Purines and Pyrimidines are two types of nitrogenous bases found as the building blocks of nucleic acid of both DNA and RNA. Equal amounts of purines and Pyrimidines are found in cells. Both purines and Pyrimidines are heterocyclic, aromatic organic compounds which are involved in the synthesis of proteins and starch, regulation of enzymes and … Read more