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.
| 1951. |
which one out of A-D given below corectly represents the structural formula of the basic amino acid ? A. DB. AC. BD. C |
| Answer» Correct Answer - A | |
| 1952. |
which one is the most abundent protein in the animal world ?A. CollagenB. insulinC. TrypsinD. Haemoglobin |
| Answer» Correct Answer - A | |
| 1953. |
Dextrose isA. `L-(-)-` glucoseB. `D-(+)-` glucoseC. `D-(-)-` fructoseD. `L-(+)-` fructose |
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Answer» Correct Answer - B Naturally occuring glucose, which is `D - (+) -` glucose, is called dextrose because it is dextrorotatory. |
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| 1954. |
Carbohydrates that are not cleaved to smaller carbohydrates on attempted hydrolysis are calledA. monosaccharideB. DisaccharideC. oligosaccharideD. polysaccharide |
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Answer» Correct Answer - A Monosaccharides are the simplest carbohydrates which cannot be hydrolysed to smaller molecules, their general formula is `(CH_(2) O)_(n)` where `n = 3` to 10. For example, galactose is a monosaccharide. Oligosaccharides on hydrolysis could yield 2 to 10 monosaccharides. |
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| 1955. |
The smallest aldose isA. GlyceraldehydeB. glucoseC. threoseD. Ribose |
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Answer» Correct Answer - A Glyceraldehyde, `HOCH_(2)CHOHCHO` is an aldotriose. Glucose is an aldopentose. Threose is an aldotetrose while ribose is an aldopentose. |
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| 1956. |
Which of the following statements is not correctA. Insulin maintains sugar level in the blood of a human bodyB. Ovalbumin is a simple food reserve in egg whiteC. Blood proteins thrombin and fibrinogen are involved in blood clottingD. Denaturation makes the proteins more active |
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Answer» Correct Answer - D Deprotonation of protein occure when it is subjected to physical change like change in temperature or chemicals change like changein pH, the hydrogen bonds are disturbed. As a result, globules unfolds and helix get uncoiled and protein makes the protein inactive. |
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| 1957. |
Haemoglobin is `a//an`A. carbohydrateB. vitaminC. globular proteinD. enzyme |
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Answer» Correct Answer - C It is a red colouring matter (respiratory pigment) present in the red blood cells. It consist if a protein, globin, combined with a prosthetic group, haem . It serves to carry `O_(2)` ,which is breath in, round the body in the form of an easily decompsed compound, oxyhaemoglobin. |
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| 1958. |
Which base is present in `RNA` but not in `DNA`?A. GuanineB. AdenineC. UracilD. Thymine |
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Answer» Correct Answer - C Uracil replaces thymine in an `RNA` nucleoside (or nucleotide). Adenine and guanine are two purine bases that are present in both `DNA` and `RNA`. |
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| 1959. |
If `N_(1), N_(2), N_(3)`………Are the number of molecules with molecular masses `M_(1), M_(2), M_(3)`…….respectively, then average molecular mass is expressed asA. `(sum N_(i) M_(i)^(2))/(sum N_(i) M_(i))`B. `(sum N_(i) M_(i))/(sum N_(i))`C. both of theseD. None of these |
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Answer» Correct Answer - C Number average molecular mass `overline (Mn) = (sum N_(i) M_(i))/(sum N_(i))` Mass average molecular mass `overline(Mw) = (sum N_(i) M_(i)^(2))/(sum N_(i) M_(i))` |
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| 1960. |
Glucose reacts with `HNO_(3)` to formA. GluconicB. SaccharicC. SulphuricD. Glyconic |
| Answer» Correct Answer - B | |
| 1961. |
Neoprene is a polymer ofA. propeneB. Viny1 chlorideC. ChloropreneD. Butadiene |
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Answer» Correct Answer - C `n(CH_(2)=underset("Neoprene")underset(Cl)underset(|)(C)-CH=CH_(2))to(-CH_(2)-underset("Neoprene")underset(Cl)underset(|)(C)=CH-CH_(2)-)_(n)` |
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| 1962. |
Carbohydrate is a condensation polymer ofA. Amino acidB. NucleotidesC. StyreneD. Simple sugars |
| Answer» Correct Answer - D | |
| 1963. |
The correct statement about the sugars given above areA. I and II are L-SugarsB. II and III above D-SugarC. I and II and D-sugarsD. I is L-sugar |
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Answer» Correct Answer - B::D `I` is L-sugar whereas `II` & `III` is D-sugar. |
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| 1964. |
Which of the following is not a natural polyhmer ?A. CelluloseB. ProteinC. `PVC`D. Nucleic acid |
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Answer» Correct Answer - C `PVC` is a synthetic polymer made by viny1 chloride. |
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| 1965. |
Polymer obtained by condensation polymerzation is `:`A. PolytheneB. tefloonC. PVCD. nylon`-6,6` |
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Answer» Correct Answer - D Nylon`-6,6` is obtained by condensation polymerization which involves hexamethylene diamine and adipic acid. |
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| 1966. |
The correct statement (s) about starachA. It is a pure single compoundB. It is mixture of two polysacchardes of glucoseC. It involves the `(C_(1)-C_(4)) alpha -` glucosidic linkage between two `alpha-D` glucose units.D. It involves branching by `(C_(1) - C_(6))` glycosidic linkage. |
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Answer» Correct Answer - B::C::D Starach is the mixture of two polysaccharides - Anylose and amylopectine. |
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| 1967. |
Which of the followinig statement is false ?A. The repeat unit in natural rubber is isopreneB. Both starch and cellulose are polymers of glucoseC. Artificial silk is derived from celluloseD. Nylon`-6,6` is an example of elastomer |
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Answer» Correct Answer - D Nylon `-6,6` is a fibre and not an elastomer. |
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| 1968. |
Of the following which one is classified as polyester polymer ?A. Nylon`-6,6`B. BakeliteC. TeryleneD. Melamine |
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Answer» Correct Answer - C Terylene or dacron is the best known example of polyesters which is prepared by condensation polymerization of ethylene glycol and terephthalic acid. |
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| 1969. |
Carbohydrates may be :A. sugarsB. starchC. polyhydroxy aldehyde/ketonesD. Compounds that can be hydrolysed to sugar |
| Answer» Correct Answer - a,b,c,d | |
| 1970. |
When the following aldohexose exists in its D-configuration, the total number of stereoisomers in its pyranose form, is `{:(CHO),(|),(CH_(2)),(|),(CHOH),(|),(CHOH),(|),(CHOH),(|),(CH_(2)OH):}` |
| Answer» Correct Answer - 8 | |
| 1971. |
Why living organisms cannot not work can be done and living organisms have to work continuously. |
| Answer» Because at equilibrium no work can be done and living organisms have to work continuously. | |
| 1972. |
What is metabolic flux ? |
| Answer» Metabolic flux is the turnover of molecules through a metabolic pathway. | |
| 1973. |
The. vita11Jin present in liver of pig inA. `B_2`B. `B_3`C. `B_6`D. `B_(12)` |
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Answer» Correct Answer - D |
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| 1974. |
Spoilage of oil can be detected by which fatty acid ?A. Oleic acidB. Linolenic acidC. Linoleic acidD. Erucic acid |
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Answer» Correct Answer - D Erucic acid occurs as glycerides in vegetable oils It is a mouounsaturated ornega-9-fatty acid lt is found in rapseed, mustared seed and wallflower seed. |
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| 1975. |
Which of the folowing element is responsible for oxidation of water to `O_2` in biological processes?A. FeB. MnC. CuD. Mo |
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Answer» Correct Answer - B Manganese, Mn is responsible for the oxidation of water of `O_(2)` |
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| 1976. |
Translocation of sugars in flowering plants occurs in the form ofA. glucoseB. sucrose disaccharideC. fructoseD. maltose |
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Answer» Correct Answer - A |
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| 1977. |
How many nucleotides are found in one spiral of B-DNA?A. 5B. 10C. 20D. 25 |
| Answer» Correct Answer - C | |
| 1978. |
Anabolic pathways….a….. energy and catabolic pathways……b…. energyA. a-consume, b-releaseB. a-release,b-consumeC. a-consume,b-consumeD. a-release,b-release |
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Answer» Correct Answer - A (A) Anabolic pathways consume energy and catabolic pathways release energy. |
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| 1979. |
What is a substrate? |
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Answer» The substance upon which an enzyme acts is termed as the substrate. |
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| 1980. |
What is endo-enzyines? Give examples. |
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Answer» The enzymes which act within the cell in which they are synthesized are known as endoenzymes E.g., enzymes produced in the chloroplast and mitochondria. |
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| 1981. |
Formation of proteins is a tyoe ofA. dehydration synthesisB. dehydrogenationC. hydration synthesisD. hydrogenation |
| Answer» Correct Answer - A | |
| 1982. |
Point out the incorrect statemet regarding proteins.A. Most of enzymes and may hormones are proteinsB. Proteins are stuctural components of membrane.C. Proteins are high energy yieldin compounds.D. Immunglobulins are proteins. |
| Answer» Correct Answer - C | |
| 1983. |
Triglyceride consits ofA. Three fatty acids + two glycerolsB. Three fatty acids + one glycerolC. One fatty acid + one glycerolD. One fatty acid +three glycerols |
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Answer» Correct Answer - B (B) Triglyceride consist of three fatty acids + one glycerol. |
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| 1984. |
Most abundant component of cell isA. ProteinB. WaterC. CelluloseD. Lipid |
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Answer» Correct Answer - B (B) Most abundant component of cell is water (70-90%) |
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| 1985. |
Select the option that correctly identifies the chemical bonds present in the given biomolecules. Polysaccharides-A, Proteins-B, Fats-C, Water -DA. `{:(A,B,C,D),("Ester", "Peptide", "Glycosidic", "Hydrogen"):}`B. `{:(A,B,C,D),("Glycosidic", "Peptide", "Ester", "Hydrogen"):}`C. `{:(A,B,C,D),("Glycosidic", "Peptide", "Hydrogen", "Ester"):}`D. `{:(A,B,C,D),("Hydrogen", "Ester", "Peptide", "Glycosidic"):}` |
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Answer» Correct Answer - B In polysaccharides, monosaccharides are linked together by glycosidic bond `(C-O-C)`. It is formed by dehydration between two carbon atoms of two adjacent monosaccharides. Water has hydrogen bonding. Amino acids in a protein are linked through peptide bond whereas ester bond is present in fats. |
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| 1986. |
`alpha`-helical model of protein was discovered byA. Pauling and CorreyB. WatsonC. MorganD. Berzelus |
| Answer» Correct Answer - A | |
| 1987. |
Which one of the following biomolecules is correctly characterrisedA. Lecithin - a phosphorylated glyceride found in cell membraneB. Palmitic acid - an unsaturated fatty acid with 18 carbon atomsC. Adenylic acid - adenosine with a glucose phosphate moleculeD. Alanine amino acid - Contains an amino group and an acidic group anywhere in the molecule |
| Answer» Correct Answer - A | |
| 1988. |
which one of the following biomolecules is correctly characterized ?A. Adenylic acid -adensione with a glucose phosphate moleculeB. Alannine amino acid- Contains an amino group and an acidic group and ancidi group anywhere in the moleculeC. Lecithin -a phosphorylated glyceride found in cell membrance.D. Palmitic acid- an unstaurated fatty acid with 18 carbon atoms |
| Answer» Correct Answer - C | |
| 1989. |
which of the following describes the given graph corractly ? A. Endothermic reaction with energy A in absence of enzyme and B in presence of enzymeB. Exothermic reaction with energy A in absence of enzyme and B in presence of enzymeC. Endothermic reaction with energy A in presence of enzyme and B in absence of enzymeD. Exothermic reaction with energy A in presence of enzyme and B absence of enzyme . |
| Answer» Correct Answer - D | |
| 1990. |
Which one of the following statements is correct with reference to enzymesA. Apoenzyme=Holoenzyme+CoenzymeB. Holenzyme=Apoenzyme+CoenzymeC. Coenzyme=Apoenzyme+HoloenzymeD. Holoenzyme=Coenzyme+Cofactor |
| Answer» Correct Answer - B | |
| 1991. |
A non-proteinaceous enzyme isA. LysozymeB. RibozymeC. LigaseD. Deoxyribonuclease |
| Answer» Correct Answer - B | |
| 1992. |
which of the following describes the given graph corractly ? A. Endothermic reaction with energy A in presence of enzyme and B in absence of enzymeB. Exothermic reaction with energy A in presence of enzymeC. Endothermic reaction with energy A in absence of enzyme and B in presence of enzymeD. Exothermic reaction with energy A in absence of enzyme and B in presence of enzyme |
| Answer» Correct Answer - B | |
| 1993. |
Which of the following is the least likely to be involved in stabilizing the three-dimensional folding of most proteinsA. Hydrophobic interactionB. Ester bondC. Hydrogen bondD. Electrostatic interaction |
| Answer» Correct Answer - B | |
| 1994. |
Strands of DNA are bonded byA. HydrogenB. CarbonC. OxygenD. Nitrogen |
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Answer» Correct Answer - A (a) There is double hydrogen bone between adenine and thymine (A = T) and triple bond between cytosine and guanine `(C -= G)`. |
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| 1995. |
Chitin is aA. PolysaccharideB. Nitrogenous polysaccharideC. LipoproteinD. Protein |
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Answer» Correct Answer - B (b) Polymer of N-acetyleglucosamine `(C_(8)H_(13)O_(5)N)_(n)` that forms exoskeleton of arthropods and cell wall of fungi. |
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| 1996. |
Which of the following is not a salient feature of B-DNA ?A. One full turn of helical strand involves 10 base pairsB. Pitch of helix would be 34 ÅC. Diameter of double helix would be 20 ÅD. DNA with left handed coiling |
| Answer» Correct Answer - D | |
| 1997. |
All the following statements are correct about enzymes, but one is wrong. Select the incorrect statement.A. Almost all enzymes are proteinsB. There are some nucleic acids which behave like enzymes and are called ribozymesC. Enzymes obtained from thermophilic organisms retain their catalytic power even at high temperatures up to `80-90^(@)C`D. Ribozyme was discovered by Altman et al. |
| Answer» Correct Answer - D | |
| 1998. |
Which of the following is not an example of competitive inhibition ?A. Inhibition of succinic dehydrogenase by malonateB. Sulpha drugs used to control bacterial pathogensC. Inhibition of alcohol dehydrogenase by ethanol in methanol poisoningD. Inhibition of hexokinase by glucose-6-phosphate |
| Answer» Correct Answer - D | |
| 1999. |
Which of the following remains unchanged in reversible competitive inhibition?A. `V_("max")`B. `K_(m)`C. BothD. None of these |
| Answer» Correct Answer - A | |
| 2000. |
Telomerase is an enzyme which is aA. Simple proteinB. RNAC. RibonucleoproteinD. Repetitive DNA |
| Answer» Correct Answer - C | |