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Determine the term - essential element
It becomes difficult to meet all the conditions so as to establish essentiality. This is particularly so for the elements that are required in very small amounts. To overcome this difficulty an element required for normal growth is called essential element.
If a fragment of nucleic acid has a nucleotide sequence TAC can one assert that it is a codon or an anticodon? A nucleic acid having a TAC sequence surely is not tRNA, it is DN
An mRNA molecule codifies only one type of protein? Eukaryotic cells have monocistronic mRNA, i.e., every mRNA codifies only one polypeptide chain. Prokaryotes can present poly
What is the tympanum? In which part of the ear is it located and what is its function? The tympanum (or ear drum) is a membrane located in the middle ear just after the auditor
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Endothelium is a source of vasoconstrictor factor also. The best characterized of these are the endothelins. Endothelium produces only ET1. Unlike NO, which is released rapidly in
what are the Obstructive Lesions of Aorto Pulmonary Window? These lesions can be divided into two groups: 1) Ventricular outflow obstructive lesions i.e. Aortic Stenosis (AS) P
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Water Relations in Terrestrial Environment Insects are the largest group of metazoans which have most successfully invaded the terrestrial environment. In addition, most arach
Q. Are hormones only proteins? Some hormones are proteins, like glucagon, insulin and ADH others are derived from proteins (modified amino acids) like noradrenaline and adrenal
What is a phenotype? A phenotype is each observable characteristic of a living being conditioned by its genes. Some phenotypes may be changed by nongenetic factors (for instanc
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