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Q. What are the nucleic acids? What is the historic origin of this name?
RNA and DNA, the nucleic acids, are the molecules responsible for the hereditary information that commands the protein synthesis in living beings. The name "nucleic" derives from the fact that they were determining (by the Swiss biochemist Friedrich Miescher, in 1869) within the cell nucleus. In that time it was not acknowledged that those substances contained the hereditary information.
What is the difference between amnion and chorion? Amnion is the membrane that covers the embryo. Chorion is the membrane that covers the amnion, the yolk sac and the allantois
GASES There are 4 gases in the protoplasm which remain dissolved in its free water. These 4 gases are follows- CO 2 > O 2 > N 2 > H 2
what is the structure of ecosystem
Protozoans Prokaryotes represent only a few thousand of the estimated 2 million species of living beings known on the earth today. The rest are mostly eukaryotes that form the
Which of the following does NOT contain a guanidinium group Select one: a. Urea b. arginine c. creatine d. guanidinium ion
What are the main gas exchange organs of the plants? How is the process accomplished? In the covering of the leaves and of the primary structure of the stem gas exchange is mad
What are the main features of the meristematic cells? Why do these cells require to have a high mitotic rate? Meristematic cells have very thin cell walls, small vacuoles, a w
Q. How do kidneys participate in the regulation of the acid-basic equilibrium of the body? How are alkalosis and acidosis respectively corrected by the kidneys? Kidneys can reg
The human abo blood type codominant alleles a and b are dominant to O. A man with blood type B and women with blood type A could potentially have children with which of the followi
Who is Caius Plinius - Taxonomy? Caius Plinius Seconds, also known as Pliny the Elder (23-79 A.D.), a Roman naturalist and scholar, born in Como, mentioned nearly a thousand pl
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