Contact us

Comments

Post a Comment

Popular posts from this blog

CLASS 11TH BIOLOGY CHAPTER- 20 LOCOMOTION AND MOVEMENT NCERT QUICK REVISION NOTES FOR NEET AND CBSE EXAM

Image
LOCOMOTION AND MOVEMENT Arthritis: an inflammatory joint disease characterised by inflammation of  joints. Coccyx : tail bone formed by fusion of four coccygeal vertebrae in man. Dicondylic Skull: A Skull with two occipital condyles. Endo Skeleton: A skeleton present inside the body. Fascicle: Bundles of muscles fibres held together by connective tissue.  Fascia: Collagenous connective tissue layer that surrounds muscle bundles. Floating ribs: The ribs that remain free anteriorly, (last 2 pairs) False ribs: 8th, 9th and 10th pair of ribs not directly joins the sternum but  to seventh pair of ribs, hence called pseudoribs.  Myoglobin: A red colored pigment present in sarcoplasm of muscle. Sarcomere: A portion of myofibril between two successive 'Z' lines. Sarcolema: The plasma membrane of a muscle. Gout: Inflammation of joints due to accumulation of uric acid crystal. Suture: immovable joints between skull bones. Synovial joints: Freely movable joints between lim...
Read more

CLASS 12TH BIOLOGY CHAPTER- 6 MOLECULAR BASIS OF INHERITANCE NCERT QUICK REVISION NOTES FOR NEET AND CBSE EXAM

Image
CHAPTER 6: MOLECULAR BASIS OF INHERITANCE Search for genetic material and DNA as genetic material; Structure of DNA and RNA; DNA packaging: DNA replication; Central dogma; transcription, genetic code, translation; gene expression and regulation lac operon; genome and human and rice genome projects; DNA fingerprinting. Anticodon: A sequence of three nitrogenous bases on tRNA which is com plementary to the codon on mRNA. Genome : Sum total of genes in haploid set of chromosomes. DNA Polymorphism: The variations at genetic level, where an inheritable mutation is observed, in a population at high frequency. Satellite DNA: The repetitive DNA sequences which form a large portion of genome and have high degree of polymorphism but do not code for any proteins. Operon: A group of genes which control a metabolic pathway. Exons: The regions of a gene which become part of mRNA and code for  different regions of proteins. Introns: The regions of a gene which ...
Read more

CLASS 12TH BIOLOGY CHAPTER- 2 SEXUAL REPRODUCTION IN FLOWERING PLANTS NCERT QUICK REVISION NOTES FOR NEET AND CBSE EXAM

Image
CHAPTER 2: SEXUAL REPRODUCTION IN FLOWERING PLANTS  Flower structure; development of male and female gametophytes; pollination types, agencies and examples; outbreeding devices; pollen-pistil interaction; double fertilization; post fertilization events development of endosperm and embryo, development of seed and formation of fruit; special modes apomixes, parthenocarpy. polyembryony; significance of seed dispersal and fruit formation. Autogamy: When pollen grains of a flower are transferred from anther to  stigma of the same flower. Coleorhiza: A protective sheath of radicle in monocot seed. Coleoptile: A protective sheath of plumule in monocot seed.  Perisperm: It is diploid persistent nucellus e.g. Blackpipper, beet. Nucellus: Multicellular tissue in the centre of ovule in which embryo sac  is present. Viability of Seed: Ability of seed to retain the power of germination. Microsporogenesis: Process of formation of microspores from a pollen...
Read more