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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.
| 3401. |
Which of the following statements is true for proteins ?A. They act as antibodiesB. They act as hormones.C. They catalyse the biochemical reactions.D. all of these |
| Answer» Correct Answer - D | |
| 3402. |
Mark the wrong statement about denaturation of proteins.A. The primary structure of the protein does not change.B. Globular proteins are converted into fibrous proteinsC. Fibrous proteins are converted into globular proteinsD. The biological activity of the protein is destroyed. |
| Answer» Correct Answer - C | |
| 3403. |
Denaturation of proteins leads to loss of its biological activity byA. formation of amino acidsB. loss of primary structureC. loss of both primary and secondary structureD. loss of both secondary and tertiary structure |
| Answer» Correct Answer - D | |
| 3404. |
The correct statement in respect of protein haemoglobin is that itA. functions as a catalyst for biological reactionsB. maintains blood sugar levelC. act as an oxygen carrier in the bloodD. forms antibodies and offers resistance to diseases |
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Answer» Correct Answer - C Haemoglobin acts as oxygen carrier in the blood because four `Fe^(2+)` ions of each haemoglobin can bind with four molecules of `O_2` and form oxyhaemoglobin. `4Hb+O_2 to underset"Oxyhaemoglobin"(Hb_4O_8)` |
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| 3405. |
Drug which is used to reduce anxiety and brings calmness is known asA. TranquilizerB. DiureticC. AnalgesicD. Antacids |
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Answer» Correct Answer - A Tranquilizer. |
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| 3406. |
which of the following is an examle of additional ploymerization ?A. protenisB. teflonC. nylon-6,6D. Glyptal (polyeser) |
| Answer» Correct Answer - b | |
| 3407. |
Name the monomer of nylon-6. Mention its uses.A. caprolactumB. caprolactoneC. acrylonitrileD. isoprene |
| Answer» Correct Answer - a | |
| 3408. |
polymer of 2-methly -1,3-butaliene (isoprene) would give which product on (reductive ) ozonolysis ?A. `CH_(3)-underset(CHO)underset(|)(CH)-overset(O)overset(||)C-CH_(3)`B. `OHC-CH_(2)-CH_(2)-overset(O)overset(||)C-CH_(3)`C. `OHC-CH_(2)-CH_(2)-CH_(2)-CHO`D. `CH_(3)-underset(O)underset(||)C-CH_(2)-underset(O)underset(||)C-CH_(3)` |
| Answer» Correct Answer - d | |
| 3409. |
Which one of the following rotates the plane polarized light towards left?(a) D(+) Glucose (b) L(+) Glucose (c) D(-) Fructose (d) D(+) Galactose |
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Answer» (c) D(-) Fructose |
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| 3410. |
A solution of d-glucose in water rotates the plane polarised lightA. rightB. leftC. either sideD. none of these |
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Answer» Correct Answer - A |
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| 3411. |
Chemical name of vitamin-A isA. thiamineB. axerophthol (retinol)C. thiamineD. nicotinamide |
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Answer» Correct Answer - B |
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| 3412. |
What happens when conc. `H_2 SO_4` is treated with sugar?A. oxidationB. reductionC. dehydrationD. hydrolysis |
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Answer» Correct Answer - C When conc. `H_(2)SO_(4)` is treated with sugar dehydration takes place. `C_(12)H_(22)O_(11) overset(Conc. H_(2)SO_(4)) to 12 C +11H_(2)O` |
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| 3413. |
Which of the following disaccharides is hydrolysed by emuslin?A. CellobioseB. fructoseC. MaltoseD. Both (1) and (2) |
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Answer» Correct Answer - D Both cellobiose and lactose get hydrolyzed by emulsin, an enzyme which specifically hydrolyses `beta`- glycosidic linkages. |
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| 3414. |
Milk sugar, once digested furnishersA. lactoseB. fructoseC. D-glucoseD. L- glucose |
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Answer» Correct Answer - C Acidic hydrolysis or treatment with emulsin (which splits `beta` linkage only) converts `(+) - ` lactose into equal amounts of `D - (+) -` glucose and `D - (+) -` galactose. |
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| 3415. |
Which of the following statement is incorrect for maltose.A. It is a disaccharideB. It undergoes mutarotationC. It is a reducing sugarD. It does not have hemiacetal group |
| Answer» Correct Answer - d | |
| 3416. |
The other name of glucose is ………(a) dextrose (b) blood sugar (c) aldohexose (d) all the above |
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Answer» (d) all the above |
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| 3417. |
D-Ribose when treated with dilute `HNO_(3)` forms.A. B. C. D. |
| Answer» Correct Answer - a | |
| 3418. |
Which one is formed as major product when glucose is on reduction with concentrated HI and red P at 373K? (a) 2 – iodohexane (b) 3 – iodohexane (c) n – hexane (d) 4 – iodohexane |
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Answer» (c) n – hexane |
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| 3419. |
Glucose `underset((i)(P//HI))overset((i)(HCN//H_(3)O^(oplus)))rarrP` P is :A. n-heptanoic acidB. 2-methly hexanoic acidC. n-heptaneD. 2-methyl hexane |
| Answer» Correct Answer - a | |
| 3420. |
Glucose(HCN) Product (hydrolysis) Product (HI + Heat) A, the compound A is …………(a) Heptanoic acid (b) 2 – lodohexane (c) Heptane (d) Heptanol |
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Answer» (a) Heptanoic acid |
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| 3421. |
Aniline reacts with excess `Br_(2)//H_(2)O` to give the major productA. saccharic acidB. glucaric acidC. gluconic acidD. valeric acid |
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Answer» Correct Answer - C `CH_(2)OH(CHOH)_(4)CHO underset([O])overset(Br_(2)//H_(2)O)to underset("Gluconic acid")(CH_(2)OH(CHOH)_(4).COOH` |
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| 3422. |
The number of chiral centers in the open chain structure of glucose is :A. 3B. 4C. 5D. 6 |
| Answer» Correct Answer - B | |
| 3423. |
Two hexoses form the same osazone find the correct statement about these hexosesA. Both of them must be aldosesB. They are epimers at `C-3`C. The carbon atoms `1` and `2` in both have the same configurationD. The carbon atoms `3,4` and `5` in both have the same configuration |
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Answer» Correct Answer - D In the formation of osazone `C-1` and `C-2` react with phenyl hydrazine to form phenyl hydrazone. If `C-3,C-4,C-5` have same configuration the carbohydrates will form same osazone even if they differ in configuration at `C-1` or `C-2`. |
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| 3424. |
Find the pair which is correctly matched.A. Sucrose : monosaccharideB. Fructose : aldose sugarC. Glucose : mutarotationD. Sucrose : reducing sugar |
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Answer» Correct Answer - C Glucose shows mutarotation. |
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| 3425. |
In osazone formation of three molecules of phenylhydrazine which is the correct statement.A. All the three molecules react in similar mannerB. Two molecules reacts in similar manner whereas the third reacts in different wayC. All the three molecules react in different wayD. Only two react in same manner but the third molecules remains unreacted |
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Answer» Correct Answer - B In osazone formation first phenyl hydrazine molecule forms hydrazone at `C-1` second phenyl hydrazine molecule Oxidises the second carbon to carbonyl and third phenyl hydrazine molecule forms hydroazone with `C-2`. |
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| 3426. |
Give the following conversion acetaldehyde `rarr` alanine. |
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Answer» Correct Answer - `CH_(3)-overset(overset(O)(||))(C)-H+NH_(3)+HCN rarr CH_(3)-underset(underset(NH_(2))(|))(CH)-CN underset(H_(2)O) overset(H_(3)O^(+)//heat) (rarr) CH_(3)- underset(underset(oplusNH_(3) "alanine")(|))overset(overset(H)(|))(C)-COO^(Theta)`. `CH_(3)-overset(overset(O)(||))(C)-H+NH_(3)+HCN rarr CH_(3)-underset(underset(NH_(2))(|))(CH)-CN underset(H_(2)O) overset(H_(3)O^(+)//"heat")(rarr) CH_(2) -underset(underset(oplusNH_(3)"alanine")(|))(overset(overset(H)(|))(C)-COO^(Theta)`. |
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| 3427. |
Glucose and galactose are two isomeric monosaccharides known as:A. anomersB. epimersC. sugarsD. amino sugars |
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Answer» Correct Answer - B |
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| 3428. |
Choose the mis matcgh:A. amylose contains `alpha` 1,4 glycosidic bondB. `K^(+) rarr `most abundant mineral element in ICFC. `Na^(+) rarrr` most abundant mineral element in ECFD. cellulose `rarr` violet colour with iodine solution |
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Answer» Correct Answer - D |
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| 3429. |
Sum total of all the reactions that are taking place in a cell is known asA. catabolismB. anabolismC. metabolismD. redox reaction |
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Answer» Correct Answer - C |
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| 3430. |
Thaumatin is sweetest substance which is obtained from:A. thermophilus aquaticusB. thaumatococcus denielliC. thiobacillusD. trichoderma viridae |
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Answer» Correct Answer - B |
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| 3431. |
Which sugar occurs only in mammals ?A. trehaloseB. calactoseC. lactoseD. mannose |
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Answer» Correct Answer - C |
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| 3432. |
which substance is not a carbohydrate?A. starchB. glycogenC. waxD. glucose |
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Answer» Correct Answer - C |
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| 3433. |
Carbohydrate are stroed in mammals as :A. glucose in liverB. glycogen in muscles and spleenC. lactic acid in musclesD. glycogen in liver and muscles |
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Answer» Correct Answer - D |
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| 3434. |
Which of the following polymers of glucose is stored by animals?A. AmyloseB. CelluloseC. AmylopectinD. Glycogen |
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Answer» Correct Answer - D Glycogen is a polymer of `alpha-D` glucose stored in the liver, brain and muscles of animals, also known as animal starch. |
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| 3435. |
Which of the following polymers of glucose is stored by animals?A. StarchB. InulinC. GlycogenD. Sucrose |
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Answer» Correct Answer - C (C) In animals the glucose is stored in the form of glycogen. |
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| 3436. |
Which type of bond is found in amino acid cysteine ?A. Dipeptide bondB. Ester bondC. Ether bondD. Disulphide bond |
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Answer» Correct Answer - D (D) Disulphide bond is found in amino acid cysteine. |
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| 3437. |
Study the given statements and select the correct answer. (i) Cellulose is a homospolymer of glucose. (ii) Inulin is a homopolymer of fructose. (iii) Starch gives blue colour and glycogen gives red colour with iodine solution. (iv) Cellulose gives no colour with iodine solution.A. Statements (i), (ii) and (iii) are correct.B. Statements (i),(ii) and (iv) are correct.C. Statements (ii) and (iii) are correct.D. All statements are correct. |
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Answer» Correct Answer - D Starch can hold `I_(2)` (iodine) molecules in the helical portion. The starch-`I_(2)` is blue in colour. Cellulose does not contain complex helices and hence cannot hold `I_(2)` and hence remain colourless. |
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| 3438. |
Cellulose is a homopolymer ofA. FructoseB. MannoseC. GalactoseD. Glucose |
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Answer» Correct Answer - D (D) Cellulose is homopolymer of glucose. |
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| 3439. |
Non essential amino acid isA. not needed in the dietB. not essential for growthC. not synthesised in bodyD. not repuired for portein synthesis |
| Answer» Correct Answer - A | |
| 3440. |
Macromolecule chitin isA. Sulphur containing polysaccharideB. Simple polysaccharideC. Nitrogen containing polysaccharideD. Phosphorous containing polysaccharide |
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Answer» Correct Answer - C (C) Macromolecule chitin is nitorgen containing homopolysaccharide. |
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| 3441. |
Macromolecule chitin isA. Sulphur containing polysaccharideB. Phosphorous containing polysaccharideC. Nitrogen containing polysaccharideD. Simple polysaccharide |
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Answer» Correct Answer - C (C) Macromolecule chitin is nitorgen containing polysaccharide. |
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| 3442. |
Macromolecule chitin isA. nitrogen containing polysaccharideB. phosphorus containing polysacchandeC. sulphur containing polysaccharideD. simple polysaccharide |
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Answer» Correct Answer - A Macromolecule chitin is a complex polysaccharide containing amino sugars and chemically modified sugars, (e.g. glucosamine, N-acetyl galactosamine, etc). Polysaccharides are long carbohydrate molecules of monosaccharide units joined together by glycosidic bonds. They have a general formula `C_(z)(H_(2)O)_(y).` Chitin is The main component of the cell wall of fungi, the exoskeletons of arthropods, insects and redulae of molleuscs, etc. |
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| 3443. |
Largest macromolecule in cell isA. DNAB. celluloseC. chitinD. glycogen |
| Answer» Correct Answer - A | |
| 3444. |
Answer the following questions briefly. 1. What are reducing sugars? 2. What is meant by denatu ration of a protein? 3. How is oxygen replenished in our atmosphere? |
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Answer» 1. Reducing sugar: All those carbohydrates which reduce Fehling’s solution and Tollens’ reagent are referred to as reducing sugars. All monosaccharides whether aldose or ketose are reducing sugars. 2. Denaturation of a protein: When 2° and 3° structure of a protein is destroyed due to the physical changes like temperature, change in pH, it is called denaturation of a protein. Example: Coagulation of egg white on boiling. 3. We take oxygen from atmosphere and release CO2 . Plants take up CO2 and H2O from the atmosphere to prepare their food in the presence of sunlight and release O2 thus O2 is replenished in atmosphere. |
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| 3445. |
Which one of the following is the sweetest of all known sugars? (a) Lactose (b) Glucose (c) Fructose (d) Sucrose |
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Answer» (c) Fructose |
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| 3446. |
Which of the following is the sweetest sugar? (a) Glucose (b) Fructose (c) Lactose (d) Sucrose |
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Answer» (b) Fructose |
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| 3447. |
In fructose the possible optical isomers areA. 12B. 8C. 16D. 4 |
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Answer» Correct Answer - B Both open and cyclic (pyranose or furanose) contains four chiral carbon atoms. Therefore, number of possible optical isomers =`2^(3)=8`. |
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| 3448. |
In fructose, the possible optical isomers are ……… (a) 12 (b) 16 (c) 8 (d) 4 |
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Answer» In fructose, the possible optical isomers are 8. |
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| 3449. |
How many isomers are possible for glucose that have 4 asymmetic carbon atoms? (a) 8 isomers (b) 16 isomers (c) 2 isomers (d) 4 isomers |
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Answer» (b) 16 isomers |
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| 3450. |
Name the linkage connecting monosaccharide units in polysaccharides. |
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Answer» Glycosidic linkage. |
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