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.
| 2251. |
Net charge available on a basic amino acid at pH=1 would be ____ . |
| Answer» Correct Answer - 2 | |
| 2252. |
In `beta`-pleated secondary structureA. `alpha`-helixB. `beta`-helixC. zig-zagD. linear |
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Answer» Correct Answer - C |
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| 2253. |
The pH at which an amino acid carries no net charge is called itsA. `pK_(a)=(-logK_(a)),K_(a)`=ionization constantB. pI=(-log I),I=isoelectric pointC. `pK_(w)`D. p OH |
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Answer» Correct Answer - C Isoelectric point PI |
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| 2254. |
Which bond is not present in `alpha` -helix structure of proteinsA. intermolecular hydrogen bondB. intrarnolecular hydrogen bondC. sulphide bondD. Vander Waals forces |
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Answer» Correct Answer - A |
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| 2255. |
For alamine A. 2.34B. 7.65C. 6.02D. 7 |
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Answer» Correct Answer - A::B `pI=(pK_(alpha_(1))+pK_(alpha_(2)))/2=6.02 ` |
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| 2256. |
`alpha-` Helix is found inA. DNAB. RNAC. LipidD. carbohydrate |
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Answer» Correct Answer - A `alpha`-Helix is found in DNA. |
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| 2257. |
Drying oil invariably containsA. linoleic acidB. lauric acidC. stearic acidD. butyric acid |
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Answer» Correct Answer - A Drying oils inveriably contains linoleic acid. |
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| 2258. |
Imino acid among these compounds isA. serineB. prolineC. tyrosineD. lysine |
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Answer» Correct Answer - B Proline contains in imino (-NH=) group. As such it is an imino acids. |
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| 2259. |
Purine derivative among the following bases isA. thymineB. uracilC. guanineD. cytosine |
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Answer» Correct Answer - C Guanine is purine derivative. All others are pyrimidines. |
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| 2260. |
Cellulose is a polymer ofA. glucoseB. fructoseC. RiboseD. surcose |
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Answer» Correct Answer - A Cellulose is a polymer of glucose. |
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| 2261. |
Differentiate between `RNA` and `DNA` ?A. ribose sugar and thymine in RNAB. deoxyribose sugar and uracil in DNAC. ribose sugar and uracil in RNAD. deoxyribose sugar and guanine in DNA |
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Answer» Correct Answer - C RNA contains ribose sugar and uracil while DNA contains deoxyribose sugar and thymine |
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| 2262. |
The hormone thyroxineA. is secreted by panceaseB. is secreted by thyroidC. decreases blood sugarD. does not stimulate metabolism |
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Answer» Correct Answer - B It is an amine hormone secreted from thyroid which stimulates rate of oxidative metabolism and regulates general growth and developments. |
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| 2263. |
Hyperglycemia pertains toA. high blood -sugar levelB. low blood-sugar levelC. high concentration of salt in bloodD. low concentration of salt in blood. |
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Answer» Correct Answer - A Hyperglycemia pertains to high blood sugar level. |
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| 2264. |
Hyperglycemia impliesA. high blood-sugar levelB. low blood-sugar levelC. high concentration of salt in bloodD. low concentration of salt in blood. |
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Answer» Correct Answer - A Hyperglycemia refers to high blood-sugar level i.e. increased amount of glucose in blood. |
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| 2265. |
What are rare amino acids ? |
| Answer» Amino acids in a protein not specified by genetic code. | |
| 2266. |
What is imbibition of water due to ? |
| Answer» Adhesiveness of water molecules. | |
| 2267. |
What are higher nucleotides ? |
| Answer» Nucleotides with morre than one phosphate group. | |
| 2268. |
What are the two types of mRNAs ? How do they differ ? |
| Answer» Monocistronic ( monogenic) mRNA, it is transcribed from a single cistron (gene) and has codons for a single popypeptide , polycistronic (polygenic) mRNA, it is transcribed from many adjacent cistrons (genes) and has codons for as many polypeptides. | |
| 2269. |
How does sweat cool our body ? |
| Answer» High heat of vaporization removes a lot of heat with a loss of only a small amount of water. | |
| 2270. |
What is the starting point in the production of food and why ? |
| Answer» Photosynthesis, it produces glucose from which all other food materials are produced. | |
| 2271. |
Name the organisms which can synthesise essential amino acids and fatty acids. |
| Answer» Plants and some microorganisms. | |
| 2272. |
Name the essential fatty acids. Why are they so called ? |
| Answer» Essential fatty acids are linolenic, linoleic and arachidonic acids. These cannot be synthesized in the animal cells and are obtained with food. | |
| 2273. |
Essential fatty acids areA. not sythesized in plantsB. not synthesized in animalsC. five in numberD. both (2) and (3) |
| Answer» Correct Answer - B | |
| 2274. |
Sucorse hydrolyses readily in acids to giveA. two molecules of glucoseB. two molecules of fructoseC. one molecules of glucose and fructoseD. one molecules of glucose and galactose |
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Answer» Correct Answer - C |
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| 2275. |
Morphine an alkaloid is:A. anaestheticB. analgesicC. antisepticD. antibiotic |
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Answer» Correct Answer - B Morphine is an alkaloid-a class of organic compound of basic nature of plants origin containing at least one nitrogen atom in a ring structure of molecule, is analgesic. |
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| 2276. |
Chloramine-`T` is a:A. disinfectantB. antisepticC. analgesicD. antipyretic |
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Answer» Correct Answer - B Antiseptic durgs destruction of microorganisms that product septic iodoform, `KMnO_(4)` and some dyes such as chloraminer-T, methylene blue, gentain violet |
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| 2277. |
Which of the following is a local anaesthetic?A. DiazepamB. procaineC. MescalineD. None of these |
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Answer» Correct Answer - B The anaesthetics produce temporary insensibility to the vital function of all types od cells, specially of nervous systems and are used during surgical operations. These are classified as (i) Genral anaesthetic: Producing unconsciousness all over the body, e.g., `N_(2) O`, cyclopropane, sodium pentothal, ether and chloroform (ii) Local anaesthetic: Affect only the part of body, e.g., xylocaine, ethyl chloride, procaine etc. |
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| 2278. |
The drug used for the treatment of throat infection isA. quinineB. piperazineC. sulpha drug like sulphamlamideD. isonictin hydrazide |
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Answer» Correct Answer - C Sulpha drug is used for the treatment of throat infection. |
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| 2279. |
Which azide is explosive ?A. `Ba(N_(3))_(2)`B. `NaN_(3)`C. `KN_(3)`D. `Mg_(3)N_(2)` |
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Answer» Correct Answer - A Ionic axides are usually much stable, `e.g., KN_(3), NaN_(3)` and `Mg_(3)N_(2)` than the covalent azides. Covalent azides are used as detonators and explosives, `e.g.Ba(N_(3))_(2)`. |
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| 2280. |
The compound used in enrichment of uranium for nuclear power plant isA. `U_(3)O_(8)`B. `UF_(6)`C. `UO_(2)(NO_(3))_(2)`D. `UCI_(4)` |
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Answer» Correct Answer - A The fuel used in nuclear power plant is enriched uranium `-235` in the form of `U_(3)O_(8)`. |
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| 2281. |
Which is not a reducing sugar?A. glucoseB. fructoseC. mannoseD. sucrose |
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Answer» Correct Answer - D See reducing and non-reducing sugar |
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| 2282. |
Mutarotation does not occur in :A. sucroseB. D-glucoseC. L-glucoseD. None of these |
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Answer» Correct Answer - A Sucrose has no hemiacetal linkage. |
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| 2283. |
Glucose is reduced to n-hexane withA. `H_(2)//Ni`B. `NaBH_(4)`C. `Na//Hg, H_(2) O`D. `HI//"red P"` |
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Answer» Correct Answer - D Concentrated hydriodic acid and red phosphorus at `1000^(@)C` reduce glucose to iodo `-CHO` to `CH_(2) OH` to yields sorbitol. |
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| 2284. |
Laboratory perparation of glucose involes warming________ with a dilute acidA. starchB. celluloseC. maltoseD. surcose |
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Answer» Correct Answer - D `underset("Cane sugar")(C_(12) H_(22) O_(11)) + H_(2) O overset(H^(@))rarr underset("Glucose")(C_(6) H_(12) O_(6)) + underset("Fructose")(C_(6) H_(12) O_(6))` Starch or cellulose are used for the commercial perparation |
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| 2285. |
Glucose does not react withA. `C_(6) H_(5) NHNH_(2)`B. `NaHSO_(3)`C. `HCN`D. `NH_(2)OH` |
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Answer» Correct Answer - B The open chain form of glucose is in equilibrium with the cyclic hemiacetal form. Since reactions with `C_(6) H_(5) NHNH_(2)`, `HCN` and `H_(2)NOH` are irreversible, the equilibrium shifts to restore the low concentration (0.02%) of the aldehyde as it is depleted through reaction, and eventually all the aldose reacts. On the other hand, bisulphite addition is reversible and hence enough open-chain aldehyde remains in equilibrium with the bisulphite adduct to satisfy the equilibrium with the hemiacetal form. Consequenlty, there is no shifts noticeable reaction as there is not shift of equilibrium which can increase the cone.of open-chain aldehyde form. |
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| 2286. |
Open structure of glucose contains ___________ secondary alcoholic groupsA. fourB. fiveC. twoD. three |
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Answer» Correct Answer - A It contains one aldehyde `(-CHO)` group, one primary alcoholic `(-CH_(2)OH)` group and four secondary alcoholic `(-CHOH)` groups. |
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| 2287. |
Glucose is oxidized by nitric acid to yieldA. glycolic acidB. gluconic acidC. glucaric acidD. glyoxalic acid |
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Answer» Correct Answer - C Dilute nitric acid (a stronger oxidizing agent than bromine water) oxidizes both the `-CHO` group and the terminal `-CH_(2) OH` of an aldose to `-CO_(2) H` group. These dicarboxylic acids are known as aldaric acids `underset("Aldose")underset(CH_(2)OH)underset(|)overset(CHO)overset(|)((CHOH)_(n))overset(HNO_(3))rarrunderset("Aldonic acid")underset(CO_(2)H)underset(|)overset(CO_(2)H)overset(|)((CHOH)_(n))` The aldaric acid obtained from `D`-glucose is called `D-` glucose acid. (older terms for an aldaric acid are a glycaric acid or a saccharic acid). |
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| 2288. |
Oxidation number of `C` in glucose isA. -3B. -4C. 0D. -1 |
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Answer» Correct Answer - C `C_(6) H_(12) O_(6): 6x + 12 (+1) + 6 (-2) = 0` `x = 0` |
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| 2289. |
The reaction, Glycose `overset("zymase")rarr 2 C_(2) H_(5) OH + 2CO_(2) + ` energy, is an example toA. fermentationB. combustionC. hydrolysisD. alcoholysis |
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Answer» Correct Answer - A Fermentation is a chemical change brought about in organic substance by living organism (yeast, bacteria, etc.) by enzyme action. The above reaction in an example of alcoholic fermentation. |
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| 2290. |
Treatment of glucose with nitric acid leads to the formation of aA. monocarboxylic acidB. dicarboxylic acidC. tricarboxylic acidD. tetracarboxylic acid |
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Answer» Correct Answer - B `HNO_(3)` is the more vigorous oxidizing agent. It brings about oxidation not only of the `-CHO` group but also of the `-CH_(2) OH` group. `HOCH_(2) (CHOH)_(4) CHO overset(HNO_(3))rarr HOO underset("saccharic acid")((CHOH)_(4) COOH)` |
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| 2291. |
If glucose is warmed with concentrated sulphuric acid, it undergoesA. oxidationB. reductionC. dehydrationD. hydration |
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Answer» Correct Answer - B A vigorous reaction takes place and a black mass of sugar `C` is formed `C_(6) H_(12) O_(6) overset("cone".)underset(H_(2)SO_(4))rarr 6C` |
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| 2292. |
The linkage present in two nucleotide isA. amide linkageB. peptide linkageC. phosphodiester linkageD. glycosidic linkage |
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Answer» Correct Answer - C |
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| 2293. |
Nucleoside consist ofA. sugar and `H_3PO_4`B. sugar and baseC. `H_3PO_4` and baseD. only pentose sugar unit |
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Answer» Correct Answer - B |
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| 2294. |
In nucleotide phosphonic acid link at position.A. one of pentose sugarB. one of base unitC. five of pentose sugarD. five of base unit |
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Answer» Correct Answer - C |
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| 2295. |
The cationic detergent that is used in hair conditioner is:A. sodium dodecyl benzene suphonateB. sodium lauryl sulphateC. cetyl trimethyl ammonuim bromideD. sodium steryl sulphate |
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Answer» Correct Answer - C Ceyl trimethyl anmmonium bromide is a cationic detergent that is used in hair conditioners due to its germicidal properties. |
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| 2296. |
Which of the following is not a chromophore?A. `-N - N -`B. `-NO`C. `-NO_(2)`D. `-NH_(2)` |
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Answer» Correct Answer - D `-NH_(2)` group is not a chromophore but is an auxochrome |
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| 2297. |
Which of the following groups is not an auxochrome?A. `-N(CH_(3))_(2)`B. `-OH`C. `-OCH_(3)`D. |
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Answer» Correct Answer - D is not an auxochrome but is a chromophore. |
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| 2298. |
DNA was first discovered by-A. MiescherB. AltmanC. WatsonD. Wilkins |
| Answer» Correct Answer - A | |
| 2299. |
A molecule of ATP is struturally most similar to a moleucle ofA. RNA nucleotideB. DNA nucleotideC. Amino acidD. RNA nucleoside |
| Answer» Correct Answer - A | |
| 2300. |
The vitamins present in oils and fats areA. A,BB. A,cC. A,DD. B,C |
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Answer» Correct Answer - C Oil and fat soluble vitamins are A and D |
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