GENERAL SCIENCE By- RAJNI JHA
ABOUT ME: Faculty of GS in Karol Bagh, Delhi Bsc Chemistry Honours from Ramjas College, DU * MA English from JMI e MA sociology MA psychology B.ed from IPU Former faculty member at paramount coaching centre. *Teaching experience of five years in various prominent coaching centres
MITOCHONDRIA: . The term was given by C. Benda . In animal cell- Kolliker .In plant cell- Altmann . Double membrane bound cell organelle present in plants as well as animal cell but absent in prokaryotes. . Function: cellular respiration. Mitochondria iis called power house of the cell
ATP formation occurs at the surface of oxysomes Matrix contains its own DNA and RNA. Hence, called semi- autonomous cell organelle or cell within the cell It contains similar DNA and RNA as that of prokaryotes. So, we can say mitochondria has prokaryotic origin The ATP formation process of mitochondria is not light dependent and this process is known as phosphorylation ATP synthase particles Intermembrane space Matrix Cristae Ribosome Granules Inner membrane Outer membrane Deoxyribonucleic acid (DNA)
Sequence of evolution: Prokaryotes--fishes and corals-- amphibians---reptiles--birds- --mammals
On the basis of cell structure: Prokaryotes Eukaryotes Linear DNA .80s ribosome .Double stranded circular DNA 70s ribosome Well developed cell with well developed nucleus Nuclear membrane absent Double membrane organelle Double membrane organelle absent Single chromosome Cell division by binary fission present More than 2 chromosome .Cell division by mitosis and meoSis
Difference between plant cetf and animal cell: . Animal cell: cell wall absent Plant cell: cell wall present; made up of cellulose in plant cell, chitin in fiungi cell, murein in bacterial cell
Faculty in Delhi. Teaching experience of more than 8 years in various offline and online institutes.