PARTS OF THE ATOM/CONSTITUENTS OF ATOMS

PARTS/CONSTITUENTS OF THE ATOM PARTS OF THE ATOM: Atoms are made up of many smaller particles, three of which are of direct interest to the chemist. The three particles which are also regarded as “fundamental particles” are the proton, the... Read more

Atomicity: Definition and Types

Atomicity Atomicity is the total number of atoms contained in a molecule. For example, each molecule of nitrogen (N2) is made up of two Nitrogen atoms. So, atomicity of Nitrogen is 2, valency is sometimes used in the same sense... Read more

Dalton’s Atomic Theory, Modifications and Modern Atomic Theory

Dalton’s Atomic Theory, Modifications and Modern Atomic Theory DALTON’S ATOMIC THEORY ATOMIC THEORY: The idea that elements are made from atoms is termed the Atomic theory. In 1808, John Dalton presented his famous atomic theory which states as follows: All... Read more

ATOMS, MOLECULES AND IONS

ATOMS, MOLECULES AND IONS Matter can be defined as anything (particles or substances) that has mass and can occupy space. It is made up of particles like atoms, molecules and ions. Atom An atom can be defined as the smallest... Read more

CODONS: HOW TO READ THE CODON CHART

CODONS AND GENETIC CODE CODONS A codon is a trinucleotide sequence of DNA or RNA that corresponds to a specific amino acid. WATCH VIDEO Each codon consists of three bases; thus, there are 64 codons. how all codons are written... Read more

RNA: DEFINITION TYPES AND FUNCTIONS

RNA AND THE GENETIC CODE   “RNA AND THE GENETIC CODE” An organism must be able to store and preserve its genetic information, pass that information along to future generations, and express that information as it carries out all the... Read more

Steps and Enzymes involved in DNA replication.

Steps and Enzymes involved in DNA replication.   Enzymes of DNA Replication. “Steps and Enzymes involved in DNA replication” This process involves the action of DNA helicase, gyrase, polymerase, and ligase to create two identical molecules of DNA.   Discussion... Read more

Kingdom Protista: Phyla and Characteristics

Kingdom: Protista Kingdom Protista Characteristics (i)    They are unicellular organisms. (ii)   The organisms are all eukaryotic. (iii)   They move either by cilia, flagella or may be amoeboid by nature. (iv)   Some of the Protista are heterotrophic (including parasitic forms) while... Read more

KINGDOM FUNGI

 KINGDOM: FUNGI The fungi were formerly classified as plants. They, however, differ from plants in the composition of their cell walls. Most of their cell walls are made up of chitin rather than cellulose.   Characteristics (i)   They are eukaryotes.... Read more

KINGDOM ANIMALIA

KINGDOM ANIMALIA The Animal kingdom has 9 phyla and they are: Porifera Coelenterate Platyhelminthes Nematoda Annelida Mollusca Arthropoda Echinodermata Chordata These phyla can be placed into two sub-phyla which are Invertebrates and vertebrates. Out of all the 9 sub-phyla only... Read more