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Explain the Bohr's model?
Bohr's Model : Electrons move around the nucleus at tremendous speeds and occupy most of the space in an atom. The exact position or location of an electron at any given moment can only be predicted on the basis of probability. In a widely accepted model of the atom originally proposed by Neils Bohr, electrons move in spherical spaces called orbitals, or shells, which correspond to different energy levels. Electrons are distributed according to their energy levels, with the higher energy electrons residing in the outer shells. The innermost shell contains only 2 electrons. In common elements, the next outer shells contain 8 electrons each.
Atoms either gain, lose, or share electrons in the outer shells. Because the outer shells of many atoms are incomplete, most atoms will interact with other atoms during chemical reactions to achieve stable outer shells. The number of electrons that an atom must either gain, lose, or share to complete the outer shell is known as its valence, or oxidation number. For example, carbon has six electrons, two in its first energy level and four in the outer level. Thus, it can form a stable outer shell by gaining, losing, or sharing four electrons to complete its outer shell when it joins, or bonds, with another atom or atoms to form a compound. The following table lists the oxidation numbers of some important ions frequently used in Biology.
Define the Phytate and Protein Interaction? You may be more familiar with phytate's role in mineral absorption. However phytates also bind with starch and protein. Depending on
what are the negative and positive economic importance of snai
What are alleles of a gene? Diploid individuals have paired chromosomes. For instance in humans there are 23 pairs of chromosomes totalling 46 chromosomes. Each pair comprehend
Availability of ADP When the ADP levels increase due to hydrolysis ofATP in various biosynthetic reactions, the rate of reaction to generate ATP is accelerated and this i
Open Style - Style of Stigma Interaction Aegle, Fritillaria, Lilium spp. have variable number of stylar canals depending on the number of carpels. The epidermal cells of styla
To which heart chamber does the blood go after leaving the left atrium? What is the valve that separates these compartments? The arterial blood that has come from the lungs to
What is Inoculation and Culturing? In microbiology, inoculation is the process where a microbe of interest is introduced into a previously sterilized growth medium for the p
FATS ARE OF TWO TYPES (a) Hard Fats They are true fats which are solid at room temperature of 20 o C. It is due to presence of long chain saturated fatty acid
Define Drug Effects on Food Intake - Anorexic Effect? Have an anorexic effect, either as a direct effect of the drug on appetite e.g., some antibiotics or because of side-effec
Explain about the Secondary Protein Derivatives? These are the products of further hydrolytic cleavage of the protein molecule, Examples include: a) Proteoses: Soluble in wa
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