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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.
| 401. |
Name the reagent following reaction. `{:(undersetunderset(" "CH_2OH)(|)oversetoverset(" "CHO)|(" "(CHOH)_4),to, underset"n-hexane"(CH_3-(--CH_2--)CH_3)):}` Choose the correct option.A. `HF,Delta`B. `HCl, Delta`C. `HBr , Delta`D. `HI, Delta` |
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Answer» Correct Answer - D On prolonged t,eating with HI, glucose forms hexane, suggesting that all 6 carbon atoms are linked in straight chain. `{:undersetunderset(" "CH_2OH)|oversetoverset(" "CHO)|(" "(CHOH)_4) undersetDeltaoverset"HI"to underset"n-hexane"(CH_3CH_2CH_2CH_2CH_2CH_3):}` |
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| 402. |
Mention the chemical nature of enzyme. |
| Answer» Correct Answer - Proteins. | |
| 403. |
What basis is generally used in enzyme classification? |
| Answer» Type of chemical reaction catalysed. | |
| 404. |
Which enables glucose transport into cells?A. GLUT-1B. GLUT-2C. GLUT-3D. GLUT-4 |
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Answer» Correct Answer - D (D) GLUT -4 enable glucose transport into cells. |
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| 405. |
Which structural level enables the proteins to function as enzymes ? |
| Answer» Tertiary level. | |
| 406. |
Pepsin is an intracellular/extracellular enzyme. Which is correct? |
| Answer» Extracellular. | |
| 407. |
Signaling between cells usually resulys in the activation of proteinA. LipasesB. KinasesC. ProteasesD. Nucleases |
| Answer» Correct Answer - B | |
| 408. |
Consider the following statements about proteins 1) All natural amino acids which constituents of proteins are L -amino acids 2) glycine is optically active . 3) a -amino acids are connected by ester lmkage 4) Myosin is structural protein Among these statementsA. only 1 and 4 are correctB. only 2 and 3 are correctC. only 3 and 4 are correctD. only 4 is correct |
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Answer» Correct Answer - A |
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| 409. |
Proteins areA. MacromoleculesB. HomopolymersC. MicromoleculesD. Polymers of starch |
| Answer» Correct Answer - A | |
| 410. |
Assertion : Natural silk is made up protein . Reason : Artificial silk is a polysaccharide .A. If both assertion and Reason are true and the Reason is the correct explanation of the assertion .B. If both Assertion and Reason ate true , but the reason is not the correct explanation of the assertion .C. If Assertion is true , but Reason is falseD. if both Assertion and Reason are false. |
| Answer» Correct Answer - B | |
| 411. |
Which of the following is protein of silk ?A. MyoglobinB. KeratinC. FibroinD. Haemoglobin |
| Answer» Correct Answer - C | |
| 412. |
An octapeptide (Mol.wt `= 516 g`) on complete hydrolysis given glycine and alanine (Mol. Mass `= 89 g`). Alanine contributes `41.59 %` to total weight of hydrolysed product. How many number of alanine unit present in octapeptide. |
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Answer» Correct Answer - 3 Molecular weight of octapeptide is `516 g//"mole"`. Total bonds to be hydrolysed `(8-1) =7` Total weight of `H_(2)O` added `=7 xx 18 =126 gm/"mole"` Total weight of hydrolysed product `= 126+516 = 642 gm`. Total weight of alanine in product `= (642 xx 41.59)/(100)=267 gm`, Molecular weight of alanine `=89 g//"mole"`. Number of alanine unit `= (267)/(89) =3`. |
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| 413. |
A protein that has three helical polypeptides supercoiled to form a rope like structure isA. InsulinB. CollagenC. HaemoglobinD. Both (1) & (3) |
| Answer» Correct Answer - B | |
| 414. |
Give the amino acid sequence of the following polypeptides using the data given by partial hydrolysis. (a) `(Ser,Hyp,Pro,Thr) overset(H_(3)O+) rarr Ser, Thr +Thr,Hyp +Pro,Ser` `(Ala,Arg,Cys,Val,Leu) overset(H_(3)O+) rarr Ala,Cys+Cys,Arg+Arg,Val+Leu,Ala`. |
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Answer» Correct Answer - (a) `Pro-Ser-Thr-Hyp` (b) `Leu-Ala-Cys-Arg-Val`. (a) `Pro-Ser-Thr-Hyp` (b) `Leu-Ala-Cys=Arg-Val`. |
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| 415. |
Large molecules can be formed by the combination of a number of smaller molecules. These smaller molecules are calledA. isomerB. monomersC. epimerD. polymers |
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Answer» Correct Answer - B |
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| 416. |
Polypeptides are the chains ofA. amino acidsB. nitrogen atomsC. hydrogen atomsD. oxygen atoms |
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Answer» Correct Answer - A |
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| 417. |
Assertion : Competitive inhibitors are often used in the control of bacterial pathogens . Reason : When the inhibitor closely resembles the enzyme in its molecular structure is knonw as competitive inhibitor.A. If both assertion and reason are true and the reason is the correct explanation of the assertionB. If both assertion and reason are true and the reason is not the correct explanation of the assertionC. If assertion is true but reason is falseD. If both assertion and reason are false |
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Answer» Correct Answer - C (C) Competitive inhibitors are often used in the control of bacterial pathogens. When the inhibitor closely resembles the substrate in its molecular structure is known as competitive inhibitors |
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| 418. |
The central dogma of molecule genetics states that the genetic information flowsA. Amino acids `rarr` Proteins `rarr DNA`B. `DNA rarr` Carbohydrates `rarr` ProteinsC. `DNA rarr RNA rarr `ProteinsD. `DNA rarr RNA rarr` Carbohydrates |
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Answer» Correct Answer - C The following concepts constitute the central dogma of molecular genetics: (a) `DNA` molecules can synthesize other `DNA` molecular idential with the original (Replication). (b) A single strand of `DNA` can act as a template on which a molecule of `RNA` is synthesized in a specific manner (Transcription) (c ) `RNA` molecules in turn directs the synthesis of specific proteins which are charactersitic of each kind of organism (Translation). They were summarized by Franicis Crick as follows: `DNA overset("Replication")rarr DNA overset(overset("Transcription")rarr)underset("Reverse transcription")larr RNA overset("Translation")rarr "Protein"` |
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| 419. |
Denaturation of proteinA. disrupts the `1 ^(@)` and `2^(@)` structure of proteinsB. disrupts the 2° and 3° structure of proteinsC. disrupts 1 °,2°,3° structure of proteinsD. is reversible process |
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Answer» Correct Answer - B |
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| 420. |
The bond in protein structure, that are not broken in denaturation isA. hydrogen bondB. ionic bondC. peptide bondD. sulphide bond |
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Answer» Correct Answer - C |
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| 421. |
Mention the levels of protein organisation based on folding. |
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Answer» According to the mode of folding, four levels of protein organisation have been recognised namely primary, secondary, tertiary and quaternary. |
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| 422. |
Which of the following is/are stabilizing interaction in protein folding?A. Hydrogen bond formationB. Peptide bondsC. Disulphide bondsD. Hydrophobic interaction |
| Answer» Correct Answer - A::C::D | |
| 423. |
Aqueous solution of which of the following amino acids will be basic?A. SerineB. LysineC. LeucineD. Glutamine |
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Answer» Correct Answer - B Because it is a basic amino acid, due to the presence of a basic site in its side chain: `H_(2)N-underset((CH_(2))_(4)NH_(2))underset(|)overset(COOH)overset(|)(C)-H` There are two possible dipolar structures for Lysine `underset((I))underset(NH_(2))underset(|)(H_(3)overset(+)(N)(CH_(2))_(4))CHCOO^(-) " " underset((II))underset(.^(+)NH_(3))underset(|)(H_(2)N(CH_(2))_(4)C)HCOO^(-)` The `-COO^(-)` group is electron - withdrawing and hence base-weakening. The more distant `in`-amino group is affected less, hence, it is more basic, and gets the proton. Thus, `(I)` is the actual sturcture for lysine. |
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| 424. |
Curdling of milk isA. naturation of proteinB. denaturation of proteinC. folding of polypeptide chainD. coiling of polypeptide chain |
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Answer» Correct Answer - B |
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| 425. |
Glucose on oxidation with bromine water yields gluconic acid. This reaction confirms the presence ofA. six carbon atoms linked in straight chainB. secondary alcoholic group in glucoseC. aldehyde group in glucoseD. primary alcoholic group in glucose |
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Answer» Correct Answer - C Glucose on oxidation with bromine water yields gluconic acid. This reaction confirms the presence of aldehyde group in glucose. `{:(" "CHO,," "COOH),(underset|overset|(" "(CHOH)_4)+[O],overset(Br_2-H_2O)to,underset|overset|(" "(CHOH)_4)),(underset" Glucose"(" "CH_2OH),,underset" Gluconic acid"(" "CH_2OH)):}` Here, `Br_2-H_2O` act as an oxidising agent and led to the oxidation of glucose into gluconic acid |
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| 426. |
Assertion : Oxidation of glucose by `Br_(2)` water gives gluconic acid. Reason : `Br_(2)` water oxidises both -CHO and -OH groups.A. If both assertion and reason are correct and reason is correct explanation for assertion.B. If both assertion and reason are correct but reason is not correct explanation for assertion.C. If assertion is correct but reason is incorrect.D. If assertion and reason are both incorrect. |
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Answer» Correct Answer - C Correct reason. `Br_(2)` water oxidises -CHO groups to -COOH group. |
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| 427. |
How do you explain the presence of five —OH groups in glucose molecule? |
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Answer» Glucose gives pentaacetate derivative on acetylation with acetic anhydride. This confirms the presence of five —OH groups. |
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| 428. |
Which of the following indicates the presence of `5-OH` groups in glucose.A. penta acetyl derivative of glucoseB. cyanohydrin formation with HCNC. reaction with hydroxyl amineD. reaction with `Br_2` water |
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Answer» Correct Answer - A |
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| 429. |
Which is correct statements?A. Starch is polymer of `alpha`-glucoseB. Amylose is component of celluloseC. Protein are composed of only one type of `alpha`-amino acidD. celloboise is polysaccharides. |
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Answer» Correct Answer - A |
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| 430. |
Sucrose on treatment with conc. HCl producesA. glucoseB. fructoseC. invert sugarD. gluconic acid |
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Answer» Correct Answer - C |
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| 431. |
A furanose ring consists of a skeleton ofA. 5-carbon atomB. 7-C atomnC. 9-C atoms and one O atomD. 4-C and one O atom |
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Answer» Correct Answer - D A furanose ring consists of a skeleton of 4-carbon atoms and 1-oxygen atom. |
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| 432. |
Energy currency of the cell isA. ATPB. ADPC. AMPD. None of the above |
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Answer» Correct Answer - A The energy currency of the cell is ATP. |
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| 433. |
The set of chemical of the cell are synthesized is calledA. AnabolismB. CatabolismC. MetabolismD. Photosynthesis |
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Answer» Correct Answer - A Anabolism is the process by which various molecules of the cell are synthesized from simpler molecules in the body . |
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| 434. |
Monomer of given polymer `[-underset(underset(CH_(3))(|))overset(overset(CH_(3))(|))(C)-CH_(2)-]` is :A. 2-MethylpropeneB. StyreneC. PropyleneD. Ethene |
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Answer» Correct Answer - A The monomer is 2-methylpropene. |
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| 435. |
Choose the answer that has correctly identified the number of acetals and hemiacetals in isomaltose. A. `{:("Acetal",,"Hemiacetal"),(" "0,," "0):}`B. `{:("Acetal",,"Hemiacetal"),(" "1,," "0):}`C. `{:("Acetal",,"Hemiacetal"),(" "0,," "1):}`D. `{:("Acetal",,"Hemiacetal"),(" "1,," "1):}` |
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Answer» Correct Answer - D Acetal = Presence of 2 ethers on same carbon Hemiacetal = Presence of ether and alcohol on same carbon |
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| 436. |
What is iso-electric point ? |
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Answer» The pH at which no net migration of amino acid under the influence of applied electric field is called isoelectric point. |
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| 437. |
Explain pyranose structure of glucose. |
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Answer» The sex membered cyclic structure of glucose is called pyranose structure of glucose. |
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| 438. |
How many atoms are present in the ring of pyranose structure of glucose? |
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Answer» 5 Carbon atoms and one Oxygen atom. |
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| 439. |
IUB has divied enzymes into classesA. 6B. 5C. 8D. 4 |
| Answer» Correct Answer - A | |
| 440. |
Inhbition of acetylcholine by DEP (Diisorprophl-fluorophosphate) is an example ofA. Competitive inhibitionB. non-competitive inhibitionC. non-competitive irreversible inhibitionD. allosteric inhibition. |
| Answer» Correct Answer - C | |
| 441. |
Corn is immersed in the boiling water. It is then cooled, the solution becomes sweet. It is due toA. Enzymes are inactivated in boiling waterB. Disaccharides are converted to monosaccharidesC. Monosaccharides are converted to disaccharidesD. None of these |
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Answer» Correct Answer - B (b) Due to heating effect, disaccharides are dissociated into monosaccharides, which are sweet in nature. |
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| 442. |
Assertion : starch can be stained with iodine but cellulose can not be stained by iodine although both are hmopoluymer of glucose monomers Reason : Celluloe does not contain complex helices so can not hold iodine moleculesA. If both assertion & Reason are ture & the Reason is a correct explanation of the AssertionB. If both Assertion & Reason ar True but Reason is not a correct explantation of the AssertionC. If Assertion is True but the Reason is FalseD. If both Assertion & Reason are false |
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Answer» Correct Answer - A |
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| 443. |
Starch and cellulose areA. Branched polysaccharidesB. Storage productsC. Components of plant cell wallsD. Composed of glucose. |
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Answer» Correct Answer - D (D) Starch and cellulose are composed of glucose. |
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| 444. |
Nucleotide is composed ofA. SugarB. Phosphoric acidC. Nitrogeneous baseD. All of the above |
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Answer» Correct Answer - D (D) Nucleotide is composed of sugar, phosphoric acid and nitrogenous base. |
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| 445. |
Match the following enzymes given in Column I with the reactions they catalyse given in Column II. `{:(Column I("Enzymes"),Column II("Reactions")),(A."Invertase",1."Decomposition of urea into" NH_(3)and CO_(2)),(B."Maltase",2."Conversion of glucose into enthyl alcohol"),(C."Pepsin",3."Hydrolysis of maltose into glucose"),(D."Urease",4."Hydrolysis of cane sugar"),(E."Zymase",5."Hydrolysis of proteins into peptides"):}` |
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Answer» Correct Answer - A. `rarr(4)` B. `rarr(3)` C. `rarr(5)` D. `rarr(1)` E. `rarr(2)` `{:(Column I("Enzymes"),Column II("Reactions")),(A."Invertase","Hydrolysis of cane sngar"),(B."Maltase","Hydrolysis of maltose into glucose"),(C."Pepsin","Hydrolysis of protein into peptides"),(D."Urease","Decomposition of urea into" NH_(3) and CO_(2)),(E."Zymase","Conversion of glucose into ethyl alcohol"):}` |
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| 446. |
Pentoses and hexoses are the most common Or The simple polyhydroxy ketone molecule containing 3-7 carbons is aA. DisaccharidesB. MonosaccharidesC. OligosaccharidesD. Polysaccharides |
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Answer» Correct Answer - B (b) Pentoses and hexoses are the example of monosaccharides. |
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| 447. |
Match the following enzyms given in Column I with the reactions they catalyse given in Column II.Column I (Enzymes)Column II (Reactions)(i) Invertase(a) Decomposition of urea into NH3 and CO2(ii) Maltase(b) Conversion of glucose into ethyl alcohol(iii) Pepsin(c) Hydrolysis of maltose into glucose(iv) Urease(d) Hydrolysis of cane sugar(v) Zymase(e) Hydrolysis of proteins into peptides |
| Answer» (i) → (d) (ii) → (c) (iii) → (e) (iv) → (a) (v) → (b) | |
| 448. |
Pentoses and hexoses are the most common Or The simple polyhydroxy ketone molecule containing 3-7 carbons is aA. OligosaccharidesB. DisachharidesC. MonosaccharidesD. Polysachharides |
| Answer» Correct Answer - C | |
| 449. |
In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices. (i) Assertion and reason both are correct statements and reason explains the assertion. (ii) Both assertion and reason are wrong statements. (iii) Assertion is correct statement and reason is wrong statement. (iv) Assertion is wrong statement and reason is correct statement. (v) Assertion and reason both are correct statements but reason does not explain assertion.Assertion : D (+) – Glucose is dextrorotatory in nature.Reason : ‘D’ represents its dextrorotatory nature. |
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Answer» (iii) Assertion is correct statement and reason is wrong statement. |
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| 450. |
98% of living organism is formed of six elements-carbon , hydrogen , nitrogen , oxygen andA. S & MgB. Mg & NaC. Ca & PD. P & S |
| Answer» Correct Answer - C | |