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.
| 2601. |
(a) What is an enzyme ? (b) Give an example of co-enzyme. (c) Distinguish between apoenzyme and co-enzyme. |
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Answer» (a) Are biocatalysts. (b) NADP, NAD (c) The enzymes which work only in the presence of co-factors as known as apoenzymes. An organic non-protein cofactor which is easily separable from the apoenzyme is called co-enzyme. |
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| 2602. |
Inulin is a polymer ofA. FructoseB. GlucoseC. MannoseD. Ribose |
| Answer» Correct Answer - A | |
| 2603. |
In how many groups does polysaccharide classified? |
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Answer» Polysaccharides are classified into two group: (i) Homopolysaccharides or Homoglycans: These are formed by polymerisation of only one type of monosaccharide monomers. For e.g., starch, glycogen, cellulose is composed of a single type of monosaccharide called glucose, (ii) Heteropolysaccharide or Heteroglycans: These are produced by condensation of two or more types of monosaccharide derivatives. They include agar, peptidoglycan, arabino xylans etc. |
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| 2604. |
Inulin is a polymer ofA. Amino acidsB. GlucoseC. FructoseD. None of the above |
| Answer» Correct Answer - C | |
| 2605. |
Inulin found in plant cell is aA. LiqidB. ProteinC. PolysaccharideD. Vitamin |
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Answer» Correct Answer - C (c) Inulin is homopolysaccharides, which is found in the rood of dahlia plant. |
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| 2606. |
In plants, inulin and pectin areA. reserve materialsB. wastesC. excretory materialD. insect-attracting material |
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Answer» Correct Answer - A Inulin a polymer of fructose, is used as a stored food, particularly in roots and tubers of family-Compositae. Pectin is a mucopolysaccharide which is found in cell wall of plants. During the time of fruit ripening, the pectin hydrolyses and gives rise to the constituents of sugar. |
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| 2607. |
Chitin occurs inA. CrabB. PrawnC. AgaricusD. All of the above |
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Answer» Correct Answer - D (D) Chitin occurs in crab,prawn and Agaricus. |
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| 2608. |
RNA contains `:`A. Hexose sugarB. Dextrose sugarC. Ribose sugarD. Deoxyribose sugar |
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Answer» Correct Answer - C (C) RNA contains ribose sugar ( 5 carbon pentose sugar). |
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| 2609. |
The sugar present in `DNA` is :A. DextroseB. LevuloseC. GlucoseD. Deoxyribose |
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Answer» Correct Answer - D (D) Sugar found in DNA is deoxyribose ( 5 carbon pentose sugar ) |
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| 2610. |
Most simple amino acid isA. tyrosineB. LysineC. GlycineD. Aspartic acid |
| Answer» Correct Answer - C | |
| 2611. |
fats in the body are formed whenA. Glycogen is formed from glucoseB. sugar level becomes stable in bloodC. Extra glycogen in liver and muscless is stoppedD. None all of them |
| Answer» Correct Answer - C | |
| 2612. |
Assume that a particular amino acid has an isoelectric point of 6.0. In a solution at pH 1.0, which of the following species will predominate ?A. `H_(3)overset(+)(N)overset(R)overset(|)(CH)CO_(2)H`B. `H_(2)Noverset(R)overset(|)(CH)CO_(2)H`C. `H_(3)overset(+)(N)overset(R)overset(|)(CH)CO_(2)^(-)`D. `H_(2)Noverset(R)overset(|)(CH)CO_(2)^(-)` |
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Answer» Correct Answer - A In acidic medium Zwitter ion convert into `overset(o+)(NH_(3))-underset(R)underset(|)(CH)-COoverset(Θ)(O)+H^(o+) rarr overset(o+)(NH_(3))-underset(R)underset(|)(CH)-COOH` |
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| 2613. |
When RNA is hydrolysed there is no relationship among the quantities of different bases obtained . What does this fact suggest about the structure of RNA ? Single stranded structure of RNA. |
| Answer» DNA molecule has a double strand and four complementary bases paired with each other . Cytosine ( C) pairs with guanine (G) while thymine (T) pairs with adenine (A). Due to such structure , DNA products the products in definite molar ratio. The case is not same RNA, i.e., base pairing rule in not followed . thus , when RNA is hydrolysed , the quantities of different bases are different. This suggests that RNA has single stranded structure. | |
| 2614. |
What products would be formed when a nucleotide from DNA containing thymine is hydrolysed? Give the composition of DNA molucules as on hydrolysis it gives it all constituents. |
| Answer» When a nucleotide from DNA is hydrolysed, it will give deoxyribose sugar molecules, phosphoric acid, pyrimidine bases, i.e., guanine (G) and adenine (A) and purine bases , i.e., thymine (T) and cytosine ©. | |
| 2615. |
Assertion `:` Honey mainly contains invert sugar. Reason`:` Bees supply the enzyme invertase.A. If both the assertion and reason are true and the reason is the correct explanation of the assertionB. If both assertion and reason are true but reason is not the correct explanation of the assertion.C. If assertion is true but reason is false.D. If assertion is false but reason is true. |
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Answer» Correct Answer - A Both statements are correct and Reason is correct explanation of asserion. |
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| 2616. |
Assertion (A) Vitamin D can be stored in our body. Reason (R) Vitamin D is fat soluble vitamin.A. Assertion and reason both are correct statements and reason explains the assertion.B. Both assertion and reason are wrong statementsC. Assertion is correct statement and reason is wrong statement.D. Assertion is wrong statement and reason is correct statement. |
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Answer» Correct Answer - A Assertion and reason both are correct statements and reason explains assertion. Vitamin D can be stored in our body because vitamin D is fat soluble vitamin. |
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| 2617. |
Assertion(A): Vitamin D can be stored in our body. Reason (R): Vitamin D is a fat soluble vitamin. (a) A is correct but R not explains A. (b) Both A and R are correct and R explains A. (c) A is correct but R is wrong.(d) A is wrong but R is correct. |
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Answer» (b) Both A and R are correct and R explains A |
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| 2618. |
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 : Vitamin D can be stored in our body.Reason : Vitamin D is fat soluble vitamin. |
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Answer» (i) Assertion and reason both are correct statements and reason explains the assertion. |
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| 2619. |
Write two major functions of carbohydrates in plants. |
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Answer» (i) Cell walls of plants are made up of cellulsoe. (ii) In the form of starch, carbohydrates act as storage molecules in plants. |
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| 2620. |
Which statements are correct about the mixture of lysine `pI=9.6)` and glycine `(pI=5.97)`, sparated by electrophoresis method or by solubility method?A. At `pH=5.97`, glycine does not migrate while lysine moves to the cathode.B. At `pH=5.97`, glycine does not migrate while lysine moves to the anode.C. At `pH= 9.6`, lysine does not migrate while glycine moves to the anode.D. At `pH=5.97` of the mmixture of the solution, glycine precipitates out while lysine remains in the solution. |
| Answer» Correct Answer - A::C::D | |
| 2621. |
The polymerisation reaction shown below `2 CH-= CH overset(CuCl)rarr CH -= C-CH=CH underset(Cu_(2)Cl_(2)//NH_(4)Cl)overset(HCl)(rarr) CH_(2)=underset(underset(Cl)(|))(C)-CH=CH_(2) underset((2)"Polymerisation") overset((1)"CH_(3)MgCl)(rarr) [.^(-CH_(2)-C=underset(underset(CH_(3))(|))(CH)-CH_(2))]_(n)` would produce :A. PVCB. neopreneC. chloropreneD. Rubber |
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Answer» Correct Answer - D Final product shown in the reaction is natural rubber (iso prene). |
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| 2622. |
Glycine does not show optical activity .why? |
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Answer» Central carbon atom is not surrounded by four different groups i.e. it is not chiral . Hence it is not optically active. |
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| 2623. |
Protein found in a biological system with a unique three-dimensional structure and biological activity is called a native protein. When a protein in its native form, is subjected to a physical change like change in temperature or a chemical change like, change in pH, denaturation of protein takes place. Explain the cause. |
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Answer» Due to physical or chemical change, hydrogen bonds in proteins are disturbed, globules unfold and helix gets uncoiled therefore protein loses its biological activity. This is called denaturation of proteins. |
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| 2624. |
Primary structure of proteins is due to the presence ofA. peptide bondsB. disulphide (S-S) linkagesC. hydrogen bondsD. ionic bonds |
| Answer» Correct Answer - A | |
| 2625. |
An `alpha`- helix is the example of which type of protein structure ?A. PrimaryB. SecondaryC. TertiaryD. Quatemary |
| Answer» Correct Answer - B | |
| 2626. |
Assertion : The long protein chain is folded upon itself like a hollow ball giving rise to the tertiary structure . Reason : Tertiary structure gives a 3-dimensional view of a protein. |
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Answer» Correct Answer - B The primary structure of proteins is the sequence of amino acids in a chain, i.e., the positional information in a protein. In the secondary structure protein thread is folded in the form of a helix or in the sheet form. The long protein chain is also folded upon itself like a hollow woollen ball, giving rise to the tertiary structure. This gives us a 3-dimensional view of a protein. Tertiary structure is absolutely necessary for many biological activities of proteins. |
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| 2627. |
The most concentrated source of energy in the human body isA. nucleic acidB. sugarsC. fatsD. proteins |
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Answer» Correct Answer - C |
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| 2628. |
Prosthetic groups differ from co-enzymes in that –(A) They can serve as co-factors in a number of enzyme – catalyzed reactions(B) They require metal ions for their activity(C) They (prosthetic groups) are tightly bound to apoenzymes(D) Their association with apoenzymes is transient |
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Answer» (C) They (prosthetic groups) are tightly bound to apoenzymes Apoenzyme (protein part) and co-factor together form a complete catalytically active enzyme which is known as holoenzyme. The co-factors are of two types; metal ions and coenzymes. A coenzyme or metal ion that is very tightly or even covalently bound to the enzyme protein is known as a prosthetic group. |
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| 2629. |
one of the following is a neutral amino acid .A. ArginineB. GlycineC. Glutamic acidD. Aspartic acid |
| Answer» Correct Answer - B | |
| 2630. |
Which of the following is a neutral amino acid ?A. GlutamneB. ArginineC. ValineD. Asparagine |
| Answer» Correct Answer - C | |
| 2631. |
The most unsaturated fatty acid isA. Linoleic acidB. Oleic acidC. Linolenic acidD. Arachidonic acid |
| Answer» Correct Answer - D | |
| 2632. |
Which of the following is an unsaturated acid?A. linoleic acidB. stearic acidC. myristic acidD. lauric acid |
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Answer» Correct Answer - A Linoleic acid is an unsaturated fatty acid. |
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| 2633. |
A fat molecule hasA. 3 glycerol and one fatty acid moleculeB. one glycerol and 3 fatty acid moleculesC. one glycerol and one fatty acid moleculeD. 3 glycerol and 3 fatty acid molecule |
| Answer» Correct Answer - B | |
| 2634. |
Steucture of D mannose is : Structure of L mannose will be :A. B. C. D. |
| Answer» Correct Answer - c | |
| 2635. |
Tertiary structure of protein is stabilized by 1) hydrogen bond 2) ionic bond 3) sulphide bond 4) Vander Waals forceA. 2,4B. 1,2C. 1,2,4D. 1,2,3,4 |
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Answer» Correct Answer - D |
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| 2636. |
The correct statement about the following disaccharide A. ring (i) is pyranose with `alpha`- glycosidic linkB. ring (i) furanose with `alpha-`glycosidic linkC. ring (ii) is pyranose with `alpha`-glycosidic link.D. ring (ii) is pyranose with `beta`-glycosidic link . |
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Answer» Correct Answer - A The disaccharide is sucrose, with ring (i) having 6-members and hence is a pyranose and ring (ii) has 5-members and hence is a furanose . C-1 of ring (i) and C-2 of ring (ii) has an `alpha`-glycosidic linkage. |
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| 2637. |
Which of the following is not protein?A. woolB. hairC. nailD. starch |
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Answer» Correct Answer - D |
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| 2638. |
Irreversible precipitation of proteins is called ……………(a) denaturation (b) hydrolysis (c) transformation (d) trans esterification |
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Answer» (a) denaturation |
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| 2639. |
Which one of the following is named as peptides?(a) Esters (b) Salts (c) Amides (d) Ketones |
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Answer» Amides is named as peptides |
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| 2640. |
Nucleic acid is a polymer of …………(a) Nucleosides (b) a – aminoacids (c) nucleotides (d) glucose |
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Answer» (c) nucleotides |
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| 2641. |
Which of the following is not present in nucleotide?A. cytosineB. adenineC. guanineD. tyrosine |
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Answer» Correct Answer - D |
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| 2642. |
Which of the nucleoside? following is not present inA. phosphoric acidB. cytosineC. uracilD. guanine |
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Answer» Correct Answer - A |
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| 2643. |
choose the odd one out .A. Keratin phosphateB. yaluronic acidC. chodriotion sulphateD. Alginic acid |
| Answer» Correct Answer - D | |
| 2644. |
the center of starch grin is called hilum it is made up ofA. proteinB. CarbohydrateC. fatD. Nitrogen |
| Answer» Correct Answer - A | |
| 2645. |
Which of the following amino acid is essentialA. AlanineB. GlycineC. TryptophanD. Tyrosine |
| Answer» Correct Answer - C | |
| 2646. |
which one is a carbohydrate?A. InulinB. RaphideC. AleuroneD. Cystolith |
| Answer» Correct Answer - A | |
| 2647. |
Sugars have the suffixA. olB. oseC. osideD. one |
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Answer» Correct Answer - B |
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| 2648. |
A cellulose molecule is formed by the polymerization of glucose . The number of glucose molecules present in a cellcose isA. 600B. 6000C. 60000D. 60 |
| Answer» Correct Answer - B | |
| 2649. |
one of the following is the correct sequence of carboydrates in the order of increasing comexity of chemical strure.A. Sucrose , starch ,Oligosaccharide,maltose , trioseB. Triose , maltose , Sucrose, starch,Oligosaccharide,C. Triose , glucose ,maltose , oligsaccharide ,starchD. Oligosaccharide, triose , starch , sttarch , sucrose , maltose |
| Answer» Correct Answer - C | |
| 2650. |
Maltose is made up of :A. `alpha`-D-glucoseB. D-fructoseC. `alpha`-D-glucose and `beta`-D-glucoseD. glucose and fructose |
| Answer» Correct Answer - A | |