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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.
| 3201. |
Amino acids are classified as acidic, basic or neutral depending upon the relative number of amino and carboxyl groups in their molecule. Which of the following are acidic?A. `(CH_(3))_(2)CH-underset(" "NH_(2))underset(|)(CH)-COOH`B. `HOOC-CH_(2)-CH_(2)-underset(" "NH_(2))underset(|)(CH)-COOH`C. `H_(2)N-CH_(2)-CH_(2)-CH_(2)-COOH`D. `HOOC-CH_(2)-underset(" "NH_(2))underset(|)(CH)-COOH` |
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Answer» Correct Answer - B::D (b) `HOOC-CH_(2)-CH_(2)-underset(" "NH_(2))underset(|)(CH)-COOH` Number of COOH group = 2 Number of `NH_(2)` group = 1 Since, number of `COOH` groups `(2) gt` number of `NH_(2)` group (1). Thereofore this amino acid is acidic amino acid. (d) `HOOC- CH_(2)-underset(" "NH_(2))underset(|)(CH)-COOH` Number of `COOH` groups = 2 Number of `NH_(2)` groups=1 Since, Number of `COOH` groups `(2) gt` Number of `NH_(2)` groups (1). Therefore, amino acid is acidic. While other two are neutral amino acid as number of `NH_(2)` group in equal to number of `COOH` group in then. |
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| 3202. |
Monosaccharides usually contains.. Carbon atomsA. `C_3` to `C_(10)`B. `C_1` to `C_6`C. `C_4` to `C_(10)`D. `C_5` to `C_8` |
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Answer» Correct Answer - A |
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| 3203. |
Fill in the blanks : 1. Based on the nauture of ..a…. there are 20 amino acids. 2. Based on number of …b..and ..c…. groups, there are acidic, basic andd neutral amino acids. 3. The R group in serien is ….d...A. a-amino,b-R group, c-carboxyl, d-methylB. a-carboxyl, b-amino,c-R group,d-hydroxymethylC. a-R group,b-carboxyl,c-amino,d-hydroxymethylD. a-R group,b-caboxyl, c-amino, d-methyl |
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Answer» Correct Answer - C (C) Based on the nature of R group there are 20 amino acids. Based on number of carboxyl and amino groups, these are acidic , basic and neutral amino acids. The R group is serine is hydroxy methyl. |
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| 3204. |
Which of the following polymer is stored in the liver of animals ?A. AmyloseB. CelluloseC. AmylopectinD. Glycogen. |
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Answer» Correct Answer - D Glycogen gets stored in the liver of animals. |
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| 3205. |
How many carbon atoms are generally used in composition of monosaccharides ?A. 3 to 7B. 1 to 5C. 5 to 10D. 5 to 15 |
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Answer» Correct Answer - A Carbohydrates are also called saccharides because their basic components are sugars. Monosaccharides are those sugar or simple carbohydrate monomers which cannot be hydrolysed further into smallest compounds. They have a general formula of `C_(n)H_(2n)O_(n)`. Depending upon the number of carbon atoms, monosaccharides are of five types: trioses )having 3 carbon atoms, e.g., glyceraldehyde), tetroses (having four carbon atom, e.g., erythrose), pentoses (having five carbon atoms, e.g. ribose), hexoses (having six carbon atoms, e.g., glucose), heptoses (having seven atoms, e.g., sedoheptulose). |
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| 3206. |
What are anomers ? |
| Answer» Anomers : The two isomeric structures of a compound which differ in configuration at C-I only are called anomers. | |
| 3207. |
If one weighs as small amount of a living tissue and dry it. Now if the tissue is fully burnt, all the carbon compounds are oxidised to gaseous form and are removed. What is the remaining called ?A. FiltrateB. RetentateC. AshD. Slurry |
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Answer» Correct Answer - C (C) If on weighs a small amount of a living tissue and dry it. Now if the tissue is fully burnt, all the carbon compounds are oxidised to gaseous form and are removed. What is remaining is called ash. |
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| 3208. |
What are anomers? |
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Answer» Monosaccharides which differ only in the orientation of the ―OH group at C‐1.e.g, α‐glucose and β‐glucose. |
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| 3209. |
Take a living tissue, grind it in trinchloroacetic acid using pestle and morta, and then strain it, you would obtain two fractions : acid-soluble and acid-insoluble fraction. Acid-insoluble fraction does not containA. polysaccharidesB. nucleic acidsC. lipidsD. flavonoids and alkaloids. |
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Answer» Correct Answer - D The acid-soluble pool represents roughly the cytoplasmic composition whereas the macromolecules from cytoplasm and oraganelles becomes the acid-insoluble fraction. Together they represent the entire chemical composition of living tissue of organism of cellular pool. All the compounds which are found in the acid-soluble pool, have their molecular weight ranging from approx. `18` to around `800` daltons (Da). The acid-insoluble fraction, has only four types of organic compounds i.e., proteins, nucleic acids, polysaccharides and lipid. |
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| 3210. |
When you take cells or tissue pieces and grind them with an acid in a mortar and pestle, all the small biomolecules dissolve in the acid. Proteins, polysaccharides and nucleic acids are insoluble in mineral acid and get precipitated. The acid soluble compounds include amino acids, nucleosides, small sugars etc. When one adds a phosphate group to a nucleoside one gets another acid soluble biomolecule calledA. Nitrogen baseB. AdenineC. Sugar phosphateD. Nucleotide |
| Answer» Correct Answer - D | |
| 3211. |
When you take cells or tissue pieces and grind them with an acid in a mortar and pestle, all the small biomolecules dissolve in the acid. Proteins, polysaccharides and nucleic acids are insoluble in mineral acid and get precipitated. The acid soluble compounds include aminoacids, nucleosides, small sugars ets. When one adds a phosphate group to a nucleoside one gets another acid soluble biomolecule calleA. Nitrogen baseB. AdenineC. Sugar phosphateD. Nucleotide |
| Answer» Correct Answer - D | |
| 3212. |
Proteins have primary structure, if you are given a method to know which amino acid is at either of the two termini (ends) of a protein, can you connect this information to purity or homogeneity of a protein? |
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Answer» Yes, if we are given a method to know the sequence of proteins, we can connect this information to the purity of a protein. Accurate sequence1 of a certain amino acid is very important for the functioning of protein. Any change in the sequence can be linked to the purity or homogeneity of a protein. |
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| 3213. |
STATEMENT-1: Essential amino acids are produced by body STATEMENT-2 : Non-essential amino acids are not produced by body. STATEMENT-3 : All carbohydrates must have chiral carbonA. TTTB. FFTC. FFFD. TTF |
| Answer» Correct Answer - C | |
| 3214. |
on losing the carboxyl group as carbon dioxide , amnio acids form biologically activeA. GlucoseB. Amine such as histamineC. AlcoholD. N- base |
| Answer» Correct Answer - B | |
| 3215. |
Identify the secondary protein and quaternary proteins in following examples. Trypsin, Haemoglobin protein, Myosin protein, Actin protein, Albumin, globulin. |
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Answer» Secondary Protein: Myosin protein, Actin protein, Albumin, Globulin, Trypsin. Quaternary Protein: Hemoglobin protein |
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| 3216. |
Find out and make a list of proteins used as therapeutic agents. Find other applications of proteins (e.g., Cosmetics etc.) |
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Answer» Contraceptive pills are hormones and hence are proteins. Additionally, there are many protein supplements available in the market. Collagen is a protein which is used as an additive in various food and cosmetics. |
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| 3217. |
STATEMENT-1: Biologically active form of protein is quaternary structure. STATEMENT-2 : `beta`-sheets are secondary structure of protein STATEMENT-3 : Basic sequence of amino acids is defined by primary structure of protein.A. TTTB. FFFC. FTTD. FFT |
| Answer» Correct Answer - A | |
| 3218. |
Explain the tertiary and quaternary structure of protein with example. |
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Answer» Tertiary structure: 1. In tertiary structure the peptide chains are much looped, twisted and folded back on themselves due to formation of disulphide bonds. 2. Such loops and bends give the protein a tertiary structure. 3. E.g. Myoglobin, enzymes.. Quaternary structure: 1. When a protein has more than two polypeptide subunits their arrangement in space is called quaternary structure. 2. E.g. Haemoglobin. |
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| 3219. |
Name a protein that exhibits that quaternary structure. |
| Answer» Correct Answer - Haemoglobin | |
| 3220. |
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 : All naturally occurring α-aminoacids except glycine are optically active.Reason: Most naturally occurring amino acids have L-configuration. |
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Answer» (v) Assertion and reason both are correct statements but reason does not explain assertion. |
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| 3221. |
Many elements are found in living organisms either free or in the form of compounds. One of the following is not found in living organisms.A. SiliconB. MagnesiumC. IronD. Sodium |
| Answer» Correct Answer - A | |
| 3222. |
A condensation product of nitrogen base and pentose sugar isA. nucleoitdeB. nucleic acidC. nucleosideD. None of these |
| Answer» Correct Answer - C | |
| 3223. |
Many organic substances are negatively charged e.g., acetic acid, while others are positively charged e.g., ammoniumion. An aminoacid under certain conditions would have both positive and negative charges simultaneously in the same molecule. Such a form of aminoacid is calledA. Positively charded formB. Negatively charged formC. Neutral formD. Zwitterionic form |
| Answer» Correct Answer - D | |
| 3224. |
Many organic substances are negatively charged e.g., acetic acid, while others are positively charged e.g., ammoniumion. An aminoacid under certain conditions would have both positive and negative charges simultaneously in the same molecule. Such a form of aminoacid is calledA. Positively charged formB. Negatively charged formC. Neutral formD. Zwitter ionic form |
| Answer» Correct Answer - D | |
| 3225. |
Many organic substances are negatively charged e.g., acetic acid, while others are positively charged e.g., ammoniumion. An aminoacid under certain conditions would have both positive and negative charges simultaneously in the same molecule. Such a form of aminoacid is calledA. Positively charged formB. Negatively charged formC. Neutral formD. Zwitterionic form |
| Answer» Correct Answer - d | |
| 3226. |
Aminoacids, as the name suggests, have both an amino group and a carboxyl group in their structure. In addition, all naturally occurring aminoacids (those which are found in proteins) are called L-aminoacids. From this, can you guess from which compound can the simplest aminoacid be madeA. Formic acidB. MethaneC. PhenolD. Glycine |
| Answer» Correct Answer - B | |
| 3227. |
Which is non-reducing sugarA. sucroseB. GalactoseC. GlucoseD. Lactose |
| Answer» Correct Answer - A | |
| 3228. |
In DNA base is attached to pentose sugar throughA. `alpha`-linkageB. `delta`-linkageC. `beta`-linkageD. `gamma`-linkage |
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Answer» Correct Answer - C |
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| 3229. |
On hydrolysis a nucleoside would not yieldA. PurinesB. PyrimidineC. Pentose sugarD. Phosphoric acid |
| Answer» Correct Answer - D | |
| 3230. |
How many carbon atoms can be found in a monosaccharide?A. `5-6`B. `3-5`C. `3-7`D. `1-5` |
| Answer» Correct Answer - C | |
| 3231. |
Hair, finger,nails, hoofs, etc. are all made of:A. fatB. vitaminsC. proteinsD. iron |
| Answer» Correct Answer - C | |
| 3232. |
Which of the following sugars have the same number of carbon as present in glucose ?A. FructoseB. ErythroseC. RibuloseD. Ribose |
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Answer» Correct Answer - A Fructose and glucose, both are six caron sugars having formula `C_(6)H_(12)O_(6)`. Erthrose is a four carbon sugar. Ribulose and ribose are both five carbon sugars. |
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| 3233. |
A nucleoside is :A. base+sugarB. base+phosphateC. sugar+phosphateD. base+sugar+phosphate |
| Answer» Correct Answer - A | |
| 3234. |
Nucleoside is made up ofA. Sugar onlyB. Phosphate onlyC. Sugar and phosphateD. Sugar and base |
| Answer» Correct Answer - D | |
| 3235. |
In nucleoside, nitrogen base is attached to pentose sugar atA. 1B. 2C. 3D. 5 |
| Answer» Correct Answer - A | |
| 3236. |
Nucleoside isA. Sugar + Nitrogenous baseB. Sugar + PhosphateC. Nitrogenous base + PhosphateD. Purine + Pyrimidine |
| Answer» Correct Answer - A | |
| 3237. |
The word famous Watson -Crick double helical model of B-DNA exhibitsA. Secondary structureB. Tertiary structureC. Quaternary structureD. All of the above |
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Answer» Correct Answer - A (A) The world famous Watson -Crick double helical model of B-DNA exhibits secondary structure. |
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| 3238. |
The backbone of the DNA is formed byA. Sugar-base-sugar chainB. Base-phosphate-sugar chainC. Sugar-phosphate-sugar chainD. Base-phosphate-base chain. |
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Answer» Correct Answer - C (C) The backbone of the DNA is formed by sugar- phosphate-sugar chain. |
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| 3239. |
An acid soluble compound formed by phyosphorylation of nucleoside is calledA. nitrogen baseB. adenineC. sugar phosphateD. nucleotide. |
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Answer» Correct Answer - D Nucleoside is basically sugar + nitrogenous base. Nucleotide is sugar + nitrogenous base +phophate. DNA and RNA are composed of nucleotides. |
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| 3240. |
Cofactor (coenzyme) is a part of holoenzyme it isA. loosely attached inorganic partB. accessory non-protein substance attached firmlyC. loosely attached organic partD. None of the above |
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Answer» Correct Answer - C Coenzyme/cofactors are organic substances (often vitamins) which are loosely attached with apoenzymes. A holoenzyme is a conjugated enzyme. It has a proteinaceous part called apoenzyme and a non-proteinaceous part called cofactor. `underset("(conjugated enzyme)")("Holoenzyme")hArrunderset("non-protein part")underset("+ Cofactor")underset("(Protein part)")("Apoenzyme")` Cofactor is very necessary for the activity of holoenzyme. Cofactors can be separated from enzyme by dialysis. Cofactors may be inorganic (i.e. metal activators) or organic (i.e. coenzymes and prosthetic group). |
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| 3241. |
What is common among amylase, rennin and trypsin?A. These are all proteinsB. The are proteolytic enzymesC. These are produced in stomachD. These act at a pH lower than 7 |
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Answer» Correct Answer - A All three are proteins enzymes amylase, rennin and trypsin acts respectively on the substrates starch, lactose and protein. Amylase acts at an optimum pH-6.8-7, rennin at pH-2 and trypsin at an optimum pH-8.5. |
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| 3242. |
A tripeptide is written as Glycine-Alamine-Glucine. The correct structure o tripeptide.A. B. C. D. None of these |
| Answer» Correct Answer - C | |
| 3243. |
Select the correct statement/reaction among followingA. B. C. Compound-D is `Ph-CH_(2)-N=CH_(2)`D. Compound-E is `Ph-CO overset(Θ)O overset(o+)Na` |
| Answer» Correct Answer - a | |
| 3244. |
Glycin has the structural formula `NH_(2)-CH_(2)-COOH`. Glycine has two dissociation constant for which `K_(a)" and " K_(b)` are `1.6xx10^(-10)" and "K_(b) is 2.5xx10^(12)`. Calculate the isoelectric point of glycine [Hint : If your answer is 5.12 then fill 0512 in OMR sheet. If your answer is 8.02 then fill 0802 in OMR sheet] |
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Answer» Correct Answer - 609 `pI=overset(pK_(a1)+pK_(a2))underset(2)_" "pK_(a)=-logK_(a)` `=(9.7958+2.39)/2=6.09` `pK_(a1)=-logK_(a)" "pK_(b1)=-logK_(b)` `pK_(a1)=-log1.6xx10^(-10)" "pK_(b1)=-log2.5xx10^(-12)` `pK_(a1)=9.79" "pK_(b1)=11.6` `pK_(a1)+pK_(b1)=14` `pK_(a2)+11.6=14` `pK_(a2)=2.3979` |
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| 3245. |
The helical model for DNA given by Watson and Crick wasA. B type right handedB. Z type left handedC. B type left handedD. Z type right handed |
| Answer» Correct Answer - A | |
| 3246. |
Fill in blank with the help of given words below : Monera , Active, Passive, Dinucleoside uridine, SER, Deoxythymine, Glycoprotin, RER, Glyceride, Glycerol, Animal , Plant, Animalia, Allosteric enzyme, Competitive feed back, Leying cell, sertoli cell, Glycogen, Triacylycerides, Protista. 1. FAD and NAD enzyme cofactor are formed of `"......."`. 2. The maximum fat stored inour body is in the form of `"......."`. 3. Thymidine in DNA is replaced by `"......."` in RNA. 4. The activity of enzyme inhibited when modulators bind to its is known as `"........."` inhibition. |
| Answer» Correct Answer - 1. Dinucleotide , 2. Triacylglycerides, 3. Uridine, 4. Allosteric enzyme. | |
| 3247. |
Each polypeptide in a protein has amino acids linked with each other in a specific sequence. This sequence of amino acids is said to be... .A. primary structure of proteinsB. secondary structure of proteinsC. tertiary structure of proteinsD. quaternary structure of proteins. |
| Answer» Correct Answer - A | |
| 3248. |
Each polypeptide in a protein has amino acids linked with each other in a specific sequence. This sequence of amino acids is said to be... .A. primary structure of proteinsB. secondary structure of proteinsC. tertiary structure of proteinsD. quaternary structure of proteins |
| Answer» Correct Answer - A | |
| 3249. |
How many spirals (twins or helices) a DNA of 2000 base pairs will have?A. 2000B. 4000C. 200D. 45.5 |
| Answer» Correct Answer - C | |
| 3250. |
find the odd one out .A. Palmitic acid , stearic acidB. Oleic acid , Linoleic acidC. Linoleic acid , oleic acidD. Tripalmitin, Linolenic acid |
| Answer» Correct Answer - D | |