InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 2651. |
Carbohydrates haveA. bitter tasteB. sour tasteC. sweet tasteD. some have sweet test and some are tasteless |
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Answer» Correct Answer - D |
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| 2652. |
DNA polymerase is needed forA. Replication of DNAB. synthesis of DNAC. elongation of DNAD. All of the above |
| Answer» Correct Answer - D | |
| 2653. |
Histone occupies the major groove of a DNA at an angle ofA. `60^(@)`B. `90^(@)`C. `45^(@)` to halix axisD. `30^(@)` to helix axis |
| Answer» Correct Answer - D | |
| 2654. |
Cyanocobalamine isA. vitamin AB. vitamin `B_(2)`C. vitamin CD. none of above |
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Answer» Correct Answer - B Cyanocoblamine is vitamin `B_(12)` |
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| 2655. |
Novalgin is a commonA. analgesicB. antibioticC. hormoneD. all of these |
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Answer» Correct Answer - A Novalgin is an analgesic. |
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| 2656. |
Which one of the following is used for the treatment of tuberculosis?A. Para-aminosalicylic acidB. Isoniazid `(INH)`C. Both (a) and (b)D. None of the above |
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Answer» Correct Answer - C P-amino salicylic acid `(PAS)` and isonicotin hydrazine or isoniazed `(INH)` are used for treatment of tuberculosis. |
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| 2657. |
Which of the following is used in lowering the blood pressure?A. ReserpineB. MorphineC. CocaineD. Diethyl ether |
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Answer» Correct Answer - A Reserpine isolated from the plant Rauwolfia serpentine is used to lower blood pressure, It is also known as `Serpasil. |
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| 2658. |
Phenacetin is an example ofA. antibioticB. antimalarialC. antipyreticD. all of these |
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Answer» Correct Answer - C Phenacetinis `N`-acetyl-p-phenetidine. It is used as an antipyretic analgesic similar to aspirin. It has chronic tonicity towards kidney. |
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| 2659. |
The compound used as an antibiotic isA. ampicillinB. aspirinC. suphurylD. chloroquine |
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Answer» Correct Answer - A Ampicillin is an antibiotic. |
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| 2660. |
Aresnic drugs are mainly used in the treatment ofA. jaundiceB. typhoidC. syphilisD. cholera |
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Answer» Correct Answer - C Arsenic drugs are used in the treatment of syphilis |
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| 2661. |
The ether which is widely used as anaesthetic isA. diphenyl eitherB. ethyl etherC. methyl etherD. di-tert-butyl ether |
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Answer» Correct Answer - B Diethyl ether or ethyl ether `(C_(2) H_(5))_(2) O`. |
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| 2662. |
Which of the following substance is added to soap to make it antisepticA. lodineB. `KMnO_(4)`C. BithionalD. `Cl_(2)` |
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Answer» Correct Answer - C Bithional is added to soap to make it antiseptic |
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| 2663. |
The anaesthetic which is administered by unjection isA. diethyl etherB. diphenyl etherC. liquid nitrous oxideD. morphine |
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Answer» Correct Answer - D Morphine is anaesthetic adminstered by injection. |
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| 2664. |
Which of the following `is//are` antidepresent drug`//s`?A. CocaineB. BenzedrineC. TofranilD. All the three |
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Answer» Correct Answer - D Cocaine, Benzedrine and Tofranil are all used as antidepressant drugs. |
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| 2665. |
Which of the following is hypnotic drug?A. LuminalB. SalolC. PiperazineD. Novalgin |
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Answer» Correct Answer - A Luminal is hypnotic drug since it produces sleep. |
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| 2666. |
Which of the following food stuffs contains nitrogen?A. carbohydratesB. FatsC. proteinsD. None of the above |
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Answer» Correct Answer - C Proteins contain nitrogen as an essential elements alongwith carbon, hydrogen and oxygen |
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| 2667. |
Which of the following are not polymericA. Nucleic acidB. ProteinsC. PolysaccharidesD. Lipids |
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Answer» Correct Answer - D Among the given options except lipids all are polymers. These are formed by the polymerisation of monomers. The basic unit of lipid are fatty acids and glycerol molecules that do not form repetitive chains Instead they form triglycerides frorn three fatty acids and one glycerol molecules. |
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| 2668. |
Which one of the following statements is correct, with reference to enzymes?A. Apoenzyrne = Holbenzyme + CoenzymeB. Holoenzyme = Apoenzyme + CoenzymeC. Coenzyme = Apoenzyme + HoloenzymeD. Holoenzyme = Coenzyme + Cofactor |
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Answer» Correct Answer - B Holoenzyme It is a conjugate catalytically active enzyme together with its coenzyme. Apoenzyme The protein part of catabolically active enzyme is called apoenzyme. Coenzyme Some enzymes require additional organic or metallo-organic -molecules for their activity. These molecules are called coenzyme. So. holoenzyme is apoenzyme together with coenzyme hence option (b) is correct |
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| 2669. |
Structure of D-fructose isA. B. C. D. |
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Answer» Correct Answer - B |
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| 2670. |
Describe the properties of enzymes . |
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Answer» Properties of enzymes Enzymes are complex macromolecules with high molecular weight. They catalyze biochemical reactions in a cell. They help in the breakdown of large molecules into smaller molecules or bring together two smaller molecules to form a larger molecule. Enzymes do not start a reaction. However, they help in accelerating it. Enzymes affect the rate of biochemical reaction and not the direction. (5) Most of the enzymes have high turnover number. Turnover number of an enzyme is the number of molecules of a substance that is acted upon by an enzyme per minute. High turnover number of enzymes increases the efficiency of reaction. Enzymes are specific in action. Enzymatic activity decreases with increase in temperature. They show maximum activity at an optimum pH of 6 – 8. The velocity of enzyme increases with increase in substrate concentration and then, ultimately reaches maximum velocity. |
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| 2671. |
Cholesterol is a crucial molecule in animals. Why ? |
| Answer» Cholesterol is a common compound in animal cell membranes, and is a source of many vertebrate hormones, and other steroids. | |
| 2672. |
What assists protein molecules to fold in a complex way ? |
| Answer» Chaperone proteins have been found to function as temporary braces in helping the folding of other proteins to assume 3-dimensional shapes. | |
| 2673. |
Which one out of A-D given below correctly represent the sturctural fomula of he basic amino A. AB. BC. CD. D |
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Answer» Correct Answer - D |
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| 2674. |
What is inhibitor? |
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Answer» A substance which binds to enzyme and does not allow substrate to bind with the enzyme. This reduces the activity of the enzyme. |
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| 2675. |
What are hydrolases? |
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Answer» Hydrolases break up large molecules into smaller ones with the help of hydrogen and hydroxyl groups of water molecules. |
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| 2676. |
Which one is not an example for hydrolases Or Hydrogen is removed from a substrate with the help of enzyme or Enzyme concerned with transfer of electrons areA. DehydrogenaseB. ProteaseC. AmylaseD. Esterase |
| Answer» Correct Answer - A | |
| 2677. |
Exnzyme concerned with the transfer of electrons isA. oxidoreductasesB. cytochrome oxidaseC. dehydrogenaseD. all of these |
| Answer» Correct Answer - D | |
| 2678. |
Exnzyme concerned with the transfer of electrons isA. hydrolaseB. DehydrogenaseC. TransamineaseD. Protease |
| Answer» Correct Answer - B | |
| 2679. |
Which enzyme is concerned with transfer of electrons?A. DesmolaseB. HydrolasesC. DehydrogenaseD. Transaminase |
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Answer» Correct Answer - C ( C) Dehydrogenase is concerned with transfer of electrons. |
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| 2680. |
A coenzyme isA. Organic non-proteinaceous group that is essential for enzyme activityB. Organic or inorganic group that is essential for enzyme activityC. Same enzyme found in different organs or tissuesD. One that shares function o another enzyme |
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Answer» Correct Answer - A (A) A coenzyme is organic no-proteinaceous group that is essential for enzyme activity. |
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| 2681. |
Explain the role of sucrose in its hydrolysis. |
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Answer» `to` Sucrose is dextrorotatory but after hydrolysis gives dextrorotatory glucose and evorotatory fructose. `to` The laevorotation of fructose `(-92.4^@)C` is more than dextrorotation of glucose `(+52.5^@)`. This mixture is leavo rotators. `to` During the hydrolysis of sucrose there is a change in the sign of rotation, from dextro (+) to laevo (-) and the product is named as invert sugar. |
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| 2682. |
Write notes on starch |
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Answer» Starch : Polysaccharides : The saccharides which on hydrolysis to form large number of monosaccharides are called polysaccharides Eg: Starch and cellulose Starch : `to` Starch is the most important dietary source for human beings. `to` Vegetables , roots , cereals are important sources of starch. `to` It is a polymer of `alpha` - glucose. `to` It is constituted by two components Amylose and amylopectin Amylose : `to` It constitutes 15-20% of starch `to` Amylose is water soluble component. `to` Amylose is a branched chain with 200-1000 `alpha` - D- glucose units held by C-1 to C-4 glycosidic linkage . Amylopectin : `to` Amylopectin constitutes 80-85% of starch. `to` It is a branched chain polymer of `alpha` - glucose units in which chain is formed by C-1 to C-4 glycosidic linkage whereas branching occurs by C-1 to C-6 glycosidic linkage |
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| 2683. |
Write notes on proteins. |
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Answer» Proteins are polypeptide chains of amino acids . Classification of proteins : proteins can be classified into two type on the basis of their molecular shape. a) Fibrous proteins : These are fibre like proteins, the polypeptide chains are parallel which are held together by hydrogen and disulphide bonds. these are insoluble in water . Ex. Keratin present in hair, wool silk etc, and myosin in muscles. b) Globular proteins : In these proteins , the polypeptide chains coil around to give a spherical shape. these are soluble in water . Ex. : Insulin and albumin. The structure of proteins is explained in four different levels. a) primary structure b) secondary structure c) tertairy structure d) quaternary structure Protein Denaturation : The phenomenon of disorganization of native protein structure is known as denaturation . Denaturation results in the loss of secondary , tertiary and quaternary structure of proteins. This involves a change in physical, chemical and biological properties of protein molecules. Agents of denaturation : Physica agents - heat , violent shaking , X - rays , UV - radiation Chemical agents - Acids, alkalies, organic solvents, urea , salt of heavy metals. |
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| 2684. |
Write notes on cellulose |
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Answer» Cellulose : `to` Cellulose occurs in plants and it is the most abundant organic substance. `to` It is a major constituent of cell wall of plant cells `to` Cellulose is a straight chain polysaccharide composed only `beta` - D - glucose units which are joined by glycosidic linkage between C-1 of one glucose and C-4 of the next glucose . |
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| 2685. |
Write notes on importance of carbohydrates. |
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Answer» Importance of Carbohydrates Carbohydrates are essential for life of plants `to` Carbohydrates are used as storage molecules as starch in plants. `to` Cell wall of plants is made up of cellulose. `to` Carbohydrates are also essential for life of animals. Carbohydrates are used as storege molecules as glycogen in animals `to` Carbohydrate source honey is used for a long time as an instant source of energy |
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| 2686. |
Which of the following is structural subunit of DNA ?A. ProteinB. CarbohydrateC. RNAD. Nucleotides |
| Answer» Correct Answer - D | |
| 2687. |
How does radiation inactivates the enzymes ? |
| Answer» By destroying tertiary structure. | |
| 2688. |
Which inactivates an enzyme by occupying its active site ?A. competitive inhinitionB. allosteric inhibitorC. non-competitive inhibitorD. all of these above |
| Answer» Correct Answer - A | |
| 2689. |
Who coined the term enzyme? |
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Answer» Kuhne coined the term enzyme. |
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| 2690. |
Give an example for phospholipids. |
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Answer» Lecithin an example for phospholipids. |
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| 2691. |
Which of the following has carbohydrate as prosthetic group ?A. GlycoproteinB. ChromoproteinC. LipoproteinD. Nucleoprotein |
| Answer» Correct Answer - A | |
| 2692. |
What is an active site? |
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Answer» The part of enzyme that take part in catalyzing biochemical reaction is called active site. |
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| 2693. |
What is an enzyme? |
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Answer» Enzymes are biological catalysts produced by living cells. |
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| 2694. |
In which case a cofactor becomes a prosthetic group? |
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Answer» A cofactor that firmly attaches to the apoenzyme is called prosthetic group. |
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| 2695. |
What is a Coenzyme? |
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Answer» The nonprotein part of an enzyme is called ‘coenzyme’. |
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| 2696. |
What you mean by the activation of enzymes? |
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Answer» The conversion of inactive form of an enzyme into active form is known as activation of enzymes. |
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| 2697. |
prosthetic group is a part of holoenzyme it isA. inorganic part loosely attachedB. accessory non prtoein organic substance attached firmlyC. organic part attached looselyD. none of these |
| Answer» Correct Answer - B | |
| 2698. |
Prosthetic group is a part of holoenzyme. It isA. Loosely attached organic partB. Loosely attached inorganic partC. Non-protein organic part firmly attached with apoezymeD. None of these |
| Answer» Correct Answer - C | |
| 2699. |
Define isozymes. |
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Answer» The multiple molecular forms of an enzyme occurring in the same organism and having a similar substrate activity are called isozymes. |
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| 2700. |
Enzyme which hydrolyses starch to maltose isA. LactaseB. ProteaseC. MaltaseD. Amylase |
| Answer» Correct Answer - D | |