Month: August 2015

This video is about the salient features of chordata. Presence of notochord, Dorsal tubular nerve cord and pharyngeal gill slits, post anal tail are the basic features of chordate, which should be present in any of the stages of life or throughout the lifetime. Ascidiaceae possess these characters in larval stage, branchiostoma throughout life time, and in higher chordates notochord is replaced with vertebral column, pharyngeal gill slits modified for aerial respiration and the nerve cord is modified into Central Nervous System.

This video is about the morphology of the chromosome. Chromosomal body has elongated highly coiled DNA fibrils known as chromonema which are embedded in the matrix and matrix is covered with the pellicle. The size, shape and number of chromosome are fixed according to species. Organism having one set of chromosome are Haploid(n), with double set they are diploid, more than two set are known as polyploids.

The video is all about the general structure of DNA. The structure of DNA is double helical which is stabilized by bonds like Hydrogen bond , Phosphodiester linkage .The main components it consist of are pentose sugar , phosphate and nitrogen bases i.e. Adenine ,Guanine, Thymine, Cytosine. The two strands are tagged by 5′ and 3′ to give it a directionality

This video is about the chemical composition of chromosome, which consists of chiefly of DNA, Histone and Non- Histone Proteins. DNA,the Polynucleotide, is the sole genetic material of the organism. Five kinds of Histone proteins help in structural organization of the chromosome and they are highly conserved during evolution among species. There are about 20 Non Histone proteins having regulatory functions.

This is part of lecture presented by Ms Priyanka Khan, Asst. Professor in Biyani Girls College. This lecture is about R.H. Whittaker’s Five Kingdom Concept
According to Five Kingdom Concept of R.H. Whittaker living beings have been categorized into 5 Kingdoms:- Monera, Protista, Plantae, Fungi and Algae. Monerans are kingdom of Unicellular Prokaryotes, Protista are kingdom of Unicellular Eukaryotes, Plantae are kingdom of Multicellular Eukaryote Producers, Fungi, the kingdom of Multicellular Decomposers and Animalia are kingdom of Multicellular Eukaryote Consumers.

It is a part of lecture presented by Neha Joshi, Asst. Professor, Department of Science, Biyani Group of colleges on behalf of Gurukpo. This lecture is about antibodies, its structure and its function. The antibodies are glycoproteins which play an important role in immune system. It consist two identical heavy chains and two identical light chains. It plays an important role in opsonization and complement activation.