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Biochemistry Interview Questions & Answers - Learning Mode
COOLINTERVIEW.COM MBBS INTERVIEW QUESTIONS BIOCHEMISTRY INTERVIEW QUESTIONS QUESTIONS & ANSWERS - LEARNING MODE

Biochemistry Interview Questions & Answers - Learning Mode

Biochemistry is the branch of science that explores the chemical processes within and related to living organisms. It is a laboratory based science that brings together biology and chemistry. By using chemical knowledge and techniques, biochemists can understand and solve biological problems. Biochemistry is the application of chemistry to the study of biological processes at the cellular and molecular level. It emerged as a distinct discipline around the beginning of the 20th century when scientists combined chemistry, physiology and biology to investigate the chemistry of living systems.

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Biochemistry Interview Questions & Answers - Learning Mode
Try Biochemistry Interview Questions & Answers - Exam Mode
Question: What is the process, by which Aluminium is refined?

Answer: By Hoope?s process Source: CoolInterview.com
Question: What is Allotropy?

Answer: Allotropy is the property of some chemical elements to exist in two or more different forms, in the same physical state. Source: CoolInterview.com
Question: What are enantimorphs and diastereomers ?

Answer: Optical Isomers of a substance that are mirror images of each other are called Enantiomers (or) Enantimorphs. Ex: d and L ? Lactic acid

Optical Isomers of a substance that are not mirror images of each other are called Diastereomers. Ex: d-Tartaric and meso ?Tartaric acids Source: CoolInterview.com
Question: What are the important sources of Phosphorus?

Answer: Sources of Phosphorous are Phosphate rocks

► Flourapatite {2Ca3 (PO4)2 CaF2}
► Phosphorite {Ca3 (PO4)2}
Source: CoolInterview.com
Question: What is the difference between essential and natural amino acids?

Answer: Essential amino acids are those that the organism is not able to synthesize and that need to be ingested by the individual. Natural amino acids are those that are produced by the organism.

There are living species that produce every amino acid they need, for example, the bacteria Escherichia coli that does not have essential amino acids. Other species, like humans, need to obtain essential amino acids from the diet. Among the twenty different known amino acids that form proteins, humans c Source: CoolInterview.com
Question: What are enzyme cofactors?

Answer: Some enzymes need other associated molecules to work. These molecules are called enzyme cofactors and they can be, for example, organic ions, like mineral salts, or organic molecules.

Inactive enzymes for not being bound to their cofactors are called apoenzymes. Active enzymes bound to their cofactors are called holoenzymes.
Source: CoolInterview.com
Question: What is the formula of Hypo in Oxidation state of sulphur?

Answer: The formula of Sodium Thio Sulphate is Na2S2O3. H2O is called as hypo Oxidation state of Sulphur in it is +6 0r -2 Source: CoolInterview.com
Question: What is Thermite mixture?

Answer: A mixture of Fe2O3 and ammonium powder in 3:1 ratio is called Thermite mixture. Source: CoolInterview.com
Question: Define limiting radius.

Answer: The ratio between the radius of cation and the radius of anion is called Limiting radius. Source: CoolInterview.com
Question: Give the formula of Borax. Borax is chemically called as.

Answer: Borax Na2B4O7 10H2O is chemically called as hydrated sodium tetra borate
Source: CoolInterview.com
Question: In NH3 molecule, the bond angle decreases from 109.28 to 107.3 why does it happen.

Answer: The more repulsion between lone pair and bond pair Source: CoolInterview.com
Question: Who proposed law of mass action? What does it states?

Answer: Laws of mass action were proposed by Gulberg and Waage. The rate of chemical reaction is directly proportional to the product of the active masses of the reactants (molar concentrations of the reactants) Source: CoolInterview.com
Question: What is the numeric relation between pyrimidine and purine bases in the DNA molecule? Is that relation valid in RNA molecules?

Answer: The DNA molecule is made of two bound polynucleotide chains that form a helical structure (the double helix). The binding of the two chains is between their nitrogen-containing bases and it always obey the following rules: adenine (A), a purine base, binds with thymine (T), a pyrimidine base, and guanine (G), a purine base, binds to cytosine (C), a pyrimidine base. Therefore in one molecule of DNA there will be same number of adenine (A) and thymine (T) and same number of cytosine (C) and guanin Source: CoolInterview.com
Question: Name the elements for which Cryolite and Pelspar are the ores.

Answer: Na3 Al F6?yolite
K2O.Al2O3.6SiO2 (or) K Al Si3 O8?lspar

Both are ores of Aluminium Source: CoolInterview.com
Question: What is Isomerism?

Answer: Compounds with same molecular formula but different properties are called Isomers and the phenomenon is called Isomerism. Source: CoolInterview.com
Question: What amount of catalyst is consumed in the reaction it catalyzes?

Answer: Catalysts are not consumed in the reactions they catalyze. Source: CoolInterview.com
Question: In the extraction of sodium by cartners process the by-products formed are.

Answer: Hydrogen and Oxygen Source: CoolInterview.com
Question: Which element in 1A group is lighter than water?

Answer: Lithium, Sodium, and potassium Source: CoolInterview.com
Question: What are dextrorotary compounds and Levi rotary compounds?

Answer: Compounds that rotate the plane polarized light to the right are called Dextro rotatory compounds and that rotate the plane polarized light to the left are called Leavo rotatory.
Source: CoolInterview.com
Question: Concerning enzymatic reactions how different, are the graphic curve of the variation of the speed of a reaction as function of substrate concentration and the curve of variation of the speed of a reaction as function of temperature?

Answer: The curve of variation of speed of the enzymatic reaction as function of growing substrate concentration is a growing curves until the point where it stabilizes due to the saturation of the activation centers of the enzymes.

The curve of variation of speed of the enzymatic reaction as function of growing temperature has a crescent portion, reaches a peak (the optimum temperature) then it decreases, and reaches zero in the point of inactivity of the enzymes by denaturation. Source: CoolInterview.com

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Latest 20 Questions
Payment of time- barred debt is: (a) Valid (b) Void (c) Illegal (d) Voidable
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