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The life of a eukaryotic cell can be explained as a cell cycle. Mitosis and cell division happens in the M phase that lasts for only about 1 h. This is followed by the G1 phase where G stand for gap, then the S phase S stand for synthesis, during that time the chromosomal DNA is replicated and at last the G2 phase in that the cells prepare for mitosis. Eukaryotic cells in culture classically have cell cycle times of 16-24 h but the cell cycle time can be much longer than > 100 days for some cells in a multicellular organism. Most of the variation in cell cycle times occurs by differences in the length of the G1 phase. Some cells in vivo like neurons, stop dividing totally and are said to be quiescent locked in a G0 phase.
Prostaglandins and the structurally associated molecules prostacyclins, leukotrienes and thromboxanes, are called as eicosanoids because they having 20 carbon atoms. These hormones
Identify and briefly explain the structural and functional changes that occur in the large bowel when colorectal cancer develops.
Morphallaxis - Regeneration This kind of regeneration takes place in plants, sponges and coelenterates such as jelly fishes and hydra. The missing parts are replaced via reorg
WHAT IS THE TYPICAL REPRODUCTION CYCLE OF A DNA VIRUS
What respectively are zygotic meiosis, gametic meiosis and sporic meiosis? Zygotic meiosis is the one that happens in the haplontic haplobiontic life cycle. Gametes from adult
Sexual reproduction in Eukaryotes In most eukaryotes, especially higher animals, individuals normally exhibit one or two sex phenotypes; female or male. In such species, females
Q. Microorganisms on basis of oxygen requirement for growth? On basis of oxygen requirement for growth: - Obligate Aerobes: Require oxygen for growth and multiplication e.g
Subphylum Urochordata : (13,000 species, sea squirts) Notocord is dorally situated, nerve tube dorsally situated and is hollow, chordate characteristics seen mainly in bilatera
Define Hormonal Responses to Injury? A number of hormonal changes take place in patients following injury. There is a marked rise in the counter regulatory hormones, viz., glu
What are clotting factors? Clotting factors are substances (enzymes, coenzymes, reagents) essential for the clotting stages to happen. Besides those triggering factors and reag
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