The study of biology projects are very much important in order to understand various kinds of biological processes that occur within the animals and even the humans. Phosphoric acid has three reactive hydroxyl (-OH) groups of which two are involved in forming sugar phosphate backbone of DNA. These experiments thus indicated that DNA and not the protein, is the genetic material. This variation has sometimes been used to explain mechanism of evolution of spe­cific groups. DNA Content 7. The injected a mixture of two strains of Pneumococcus (Diplococcus pneumo­niae) into mice. The study of biology projects is very much important in order to understand various kinds of biological processes that occur within the animals and even the humans. B form (B-DNA) is the structure proposed by Watson & Crick and is the native conformation of DNA in solution. The helix observed under conditions of dehydration and high con­centrations of salt is wider and shorter than B- helix, the distinction between the major and minor grooves are reduced. Discover (and save!) Huge List of Biology Project for Class 12 CBSE| Biology Projects for Class 12 CBSE, Experiments Topics, Models Ideas for Kids and also for Middle school, Elementary School for class 5th Grade, 6th, 7th, 8th, 9th 10th, 11th, 12th Grade and High School ,CBSE, ISC Class 12 and MSC and College Students. It consists of a right-handed antiparallel double helix of sugar-phosphate backbone, with purine-pyrimidine base-pairs roughly perpendicular to the axis of the helix. Intron repeats facilitates alternate splicing or reshuffling of exons and inter-genic conversion, permit dispersion and promote genetic diversity through mobility. The FISH technique in recent years has further been modified to locate single copy or tandem sequences, utilizing primer mediated extension and amplification in situ by PGR method. Deoxyribonucleic acid is a long chain poly­mer (polynucleotide) composed of monomeric units, called nucleotides. This hydrophobic core of stacked base-pairs con- tributes considerable stability to DNA molecules present in the aqueous protoplasm’s of living cells. Dispersed repeats include mobile elements such as long interspersed nucleotide element (LINE), short interspersed nucleotide element (SINE), long terminal repeats (LTR). Z form (Z-DNA) is an unique left-handed (Fig. The main principle of this method is to make the probe- target sequence as antigenic so that, it can be detected through antibody. Pyrimidine bases are made up of a six-membered pyrimidine ring which is similar to the benzene ring except that it contains nitrogen in place of carbon at the positions 1 and 3. In order to ensure that you have a great biology project, it is important that you first understand biology and the scientific method. Topics for biology projects of 12th standards. Vikas Dixit sir. Basic Steps 4. Project Report on "CANCER" INTRODUCTION of CANCER. 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