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Determine about the prokaryotic cell
While we describe in detail the structure of a eukaryotic cell, it will be useful to examine the structural features of a typical prokaryotic cell as well. Escllericllia coli is an organism found in the intestinal tract of all human beings, and represents a typical prokaryotic organism, which has been intensively investigated. An E.coli cell is about 2pm long and 1 pm in diameter (Fig.l.2). Its cell wall is made of a rigid framework called the peptidoglycan, consisting of polysaccharide chains cross linked by peptide units. The partial structure of a peptidoglycan is shown in figure below:
A biologist examines a series of cells and counts 140 cells in interphase, 10 cells in metaphase, 4 cells in anaphase and 7 cells in telophase. if complete cell cycle requires 24 h
Using an average wavelength of 450 nm (0.45 um) can you resolve two objects that sit greater than 200nm apart from one another? Use mathematical calculations to justify your answer
How is retaining wall works? A retaining wall together with the backfill the wall retains and the soil that supports the wall is a highly indeterminate system. The magnitudes o
How different are animal cells from plant cells? Whereas plant cells are eukaryotic, autotrophic, photosynthetic and have chloroplasts and cell wall, the animal cells are eukar
Explain Ventricular Fibrillation (VF) and Pulseless Ventricular Tachycardia (VT) The commonest rhythm seen in cardiac arrest is VF, which may be preceded by a short period of
Nature: Matter and Energy Nature is not just our immediate surrounding or environment, but is the whole Universe of Cosmos. Study of the origin and topography of cosmos is ca
Which one of the following is used as vector for cloning genes into higher organisms ? 1. Baculovirus 2. Salmonella typhimurium 3. Rhizopus nigricans 4. Retrovirus
How can the visual deficiencies known as myopia and hypermetropia be optically explained? Myopia is the visual condition in which the images are produced before (in front of)
Define Reaction of Fehling Soxhlet method? The reducing sugars formed are acted upon by the alkali of Fehling's solution to form enediols. These enediols are very unstable and
Describe two pieces of evidence indicating that speciation does not always occur at the same rate. Some species of moths on the Hawaiian Islands appear to have evolved during t
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