3593 + Interview Questions in BIOMOLECULES IN GENERAL AWARENESS Page 43 InterviewSolution

2101.	Complex lipids containsA. phosphoric acidB. phosphorous acidC. hyphophosphoric acidD. metaphosphoric acid
Answer» Correct Answer - A

Discussion

2102.	Which of the following is phospholipids?A. Vitamin-AB. prostaglandiansC. LecithinD. Vitamin-D
Answer» Correct Answer - C

Discussion

2103.	Compounds `Y` and `Z` can be : (1) A. 1 onlyB. 2,3C. 1,4D. 2,3,4
Answer» Correct Answer - B (A) Monomers of bakelite are : Phenol+formaldyde. (B) Monomer of Polypropyle is propene (C) Monomers of Glyptal are :Ethylene glycol+ophthalic anhydride (D) monomer of Nylon-6-6 is :`omega` -caprolactum.

Discussion

2104.	Preparation of nylon from hexamethylene diamene and adipic acid is an example of :A. addition polymerisationB. homopolymerisationC. condensation polymerisationD. copolymerisation
Answer» Correct Answer - C::D Preparation of nylon-66 is an example of condensation polymer, as it is formed by elimination of `H_(2)O` molecules from hexamethylenediamine and adipic acid.

Discussion

2105.	The secondary structure of protein is mainly due to :A. hydrogen bondsB. covalent bondsC. hydrophobicD. disulphide bonds
Answer» Correct Answer - A `alpha`-amino acids chains are bonded with one another through h-bond

Discussion

2106.	Which of the following bases is not present in D.N.A. ?A. UracilB. AdenineC. CytosineD. Guanine
Answer» Correct Answer - A Base uracil is non present in D.N.A.

Discussion

2107.	Biuret test is used to detect:A. fatsB. sugarsC. proteinsD. waxes
Answer» Correct Answer - C Biuret test is performed to show the presence of polypeptides & proteins

Discussion

2108.	The name of the dipeptide `H_(2)Nunderset(CH_(3))underset(\|)(C)HCONHCH_(2)COOH`A. GlyeylglycineB. GlycineC. Glycine alanineD. Alanylglycie
Answer» Correct Answer - D The dipeptide is made of two amino acids they are alanie and glycine hence the name of dipeptide is alanylglycine.

Discussion

2109.	The force of attractin between the neighbouring peptide chains isA. van der Waal forceB. Covalent bondC. Hydrogen bondD. Peptide linkage
Answer» Correct Answer - C The force of attraction between the neighbouring peptide chains is hydrogen bonding.

Discussion

2110.	A zwitterion also called as …………… ion.(a) dipolar (b) monopolar (c) tripolar (d) nonpolar
Answer» Correct Answer is : (a) dipolar

Discussion

2111.	`alpha`-Amino acids behave as crystalline ionic solid and have high melting point due to the presence of :A. `-NH_(2)` groupB. `-COOH` groupC. both `-NH_(2)` and `-COOH`D. None of these
Answer» Correct Answer - C

Discussion

2112.	The order of decreasing acidity of these acidic sites is :A. `x gt z gt y`B. `z gt x gt y`C. `x gt y gt z`D. y gt x gt z`
Answer» Correct Answer - C

Discussion

2113.	In plant glycolipids sugar isA. glucoseB. fructoseC. galactoseD. mannose
Answer» Correct Answer - C

Discussion

2114.	Glucose The correctn statements about above structure of glucose are ,A. It is a Pyranose formB. It is a furanose formC. It is a `beta-` anomerD. It is a D-sugar
Answer» Correct Answer - A::C::D 6 menbered ring with oxygen making a center is pyranose form.

Discussion

2115.	The `alpha`-amino acid which does not give purple colour in the ninhydrin test isA. prolineB. glycineC. PhenylalanineD. aspartic acid
Answer» Correct Answer - A Ninhydrin test is highly specific for primary amines. Proline being a secondary amine gives a yellow orange colour with Nlnhydrin whereas all other `alpha`-amino acids give a blue purple colour with Ninhydrin.

Discussion

2116.	Assertion. Seven amino acids are referred to as the essential amino acids for humans. Reason. These are essential for health.A. If both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.B. If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion.C. If Assertion is true but the Reason is false.D. If both Assertion and Reason are false.
Answer» Correct Answer - B

Discussion

2117.

a) Amino acids can be classified into essential amino acids and non-essential amino acids. i) What is the basis of such classification? ii) Write one example each for essential and non-essential amino acids. b) Write any two differences between DNA and RNA

Answer»

a) i) The amino acids which can be synthesized in body are known as nonessential amino acids. Those amino acids which can not be synthesized in the body and must be obtained through diet are known as essential aminoacids.

ii) Essential amino acids e.g. Valine, Lysine

Non -essential amino acids e.g. Glycine, Alanine

b)

DNA	RNA
1) Double helix structure	1) Single helix
2) Sugar- deoxyribose	2) Sugar-Ribose
3) Bases – A, G, C, T	3) Bases A, G, C, U
4) Transmits Traits	4) Responsible for protein synthesis

Discussion

2118.	Which of the following is nutritionally essential amino acid for humansA. ArginieB. Aspartic acidC. GlycineD. Phenylalanine
Answer» Correct Answer - D

Discussion

2119.	Proteins are important polymers of biological systems.i) What is the denaturation of proteins?ii) Give two examples of denaturation.
Answer» i) When a protein in its native is subjected to physical change like change in temperature or chemical change like change in pH, the hydrogen bonds are distrubed, the 2° and 3° structures change and the protein loses its biological activity. This is called denaturation of the protein. ii) 1) When egg is boiled, it becomes hard because the soluble globular proteins change to in-soluble brous proteins. 2) Curdling of milk which is caused due to the formation of lactic acid by the bacteria present in milk.

2119.

Proteins are important polymers of biological systems.i) What is the denaturation of proteins?ii) Give two examples of denaturation.

Answer»

i) When a protein in its native is subjected to physical change like change in temperature or chemical change like change in pH, the hydrogen bonds are distrubed, the 2° and 3° structures change and the protein loses its biological activity. This is called denaturation of the protein.

ii) 1) When egg is boiled, it becomes hard because the soluble globular proteins change to in-soluble brous proteins.

2) Curdling of milk which is caused due to the formation of lactic acid by the bacteria present in milk.

Discussion

2120.	lsoelectric point is aA. specific temperatureB. suitable concentration of amino acidC. hydrogen ion concentration that does not allow migration of amino acid under electric fieldD. melting point of an amino acid under the influence of electric field
Answer» Correct Answer - C lsoelectric point is the point at which hydrogen ion concentration that does not allow migration of amino acid under electric field. Amino acids are also Zwitter ions hence, they do not migrate under electric field at isoelectric point.

Discussion

2121.	The correct statement in respect of protein haemoglobin is that itA. Functions as a catalyst for biological reactions.B. maintains blood sugar level.C. acts as an oxygen carrier in the blood.D. forms antibodies and offers resistance to disease.
Answer» Correct Answer - C

Discussion

2122.	The correct statement in respect of protein haemoglobin is that itA. Functions as catalyst for biological reactionB. Acts as an oxygen carrier in bloodC. Maintains sugar levelD. Forms antibodies and offers resistance to disease
Answer» Correct Answer - B Four `Fe^(2+)` ions of each haemoglobin can bind four molecules of `O_(2)` and it is carried as ocyhaemoglobin. `Hb_(4)+4O_(2) rarr Hb_(4)O_(8)` Hence, haemoglobin which transports oxygen from blood to muscles.

Discussion

2123.	a) Names of some carbohydrates, their properties and structural patterns are given below. Match them properly.GlucoseDisaccharideD-1,4 linkSucroseReducingGalactoxideLactoseInsoluble (in water)1, 6- linkageAmylopectinNon - reducingFructoxideTerisaccharideAnomers presentMono saccharide2- glucose units linkedb) Proteins have polypeptide bonds. What are polypeptides?
Answer» a) Glucose – monosaccharide – Anomers present Sucrose – Disaccharide – Fructoxide Lactose – Reducing -1,4 link Amylopectin – Insoluble in water -1,6 link b) When the number of amino acid units in a protein is more than ten, then the products are called polypeptides.

2123.

a) Names of some carbohydrates, their properties and structural patterns are given below. Match them properly.GlucoseDisaccharideD-1,4 linkSucroseReducingGalactoxideLactoseInsoluble (in water)1, 6- linkageAmylopectinNon - reducingFructoxideTerisaccharideAnomers presentMono saccharide2- glucose units linkedb) Proteins have polypeptide bonds. What are polypeptides?

Answer»

a) Glucose – monosaccharide – Anomers present Sucrose – Disaccharide – Fructoxide Lactose – Reducing -1,4 link Amylopectin – Insoluble in water -1,6 link

b) When the number of amino acid units in a protein is more than ten, then the products are called polypeptides.

Discussion

2124.	What are reducing sugars? Give one example.
Answer» Sugar units which are having free – CHO groups are reducing sugars, eg. Maltose.

2124.

What are reducing sugars? Give one example.

Answer»

Sugar units which are having free – CHO groups are reducing sugars,

eg. Maltose.

Discussion

2125.	Proteins are essential for growth in animals. They are build up of amino acid molecules. How are different amino acid molecules linked in a proteins?
Answer» By peptide linkage

Discussion

2126.	Amino acids show amphoteric behavior. Why?
Answer» Amino acids contain both NH₂ & -COOH group and hence they exhibit amphoteric character. NH⁺₃ – CH₂ – COO^-

2126.

Amino acids show amphoteric behavior. Why?

Answer»

Amino acids contain both NH₂ & -COOH group and hence they exhibit amphoteric character.

NH⁺₃ – CH₂ – COO^-

Discussion

2127.	Compare Plectonemic & Paranemic Coiling.
Answer» Plectonemic coiling – the two strands of the DNA are wrapped around each other in a helix, making it impossible to simply move them apart without breaking the entire structure. Whereas in Paranemic coiling the two strands simply lie alongside one another, making them easier to pull apart.

Discussion

2128.	The small nonprotein part (organic or inorganic) which is associated with the protein part of some enzymes and is required for their enzyme activity is called `a//an`A. cofactorB. coenzymeC. apoenzymeD. holoenzyme
Answer» Correct Answer - A An anzyme molecule may contain a non protein component known as a prosthetic group. The prosthetic group which is covalently attached with the enzyme molecule is known as cofactor while those prosthetic groups which get attached to the enzyme at the time of reaction are known as coenzyme. Moreover, cofactors that are orgainc molecules are called conezymes. The protein part of an enzyme without its cofactor is called apoenzyme while an enzyme in a combined form with its cofactor is called a holoenzyme.

Discussion

2129.	What are Proteins?
Answer» Proteins are polymers of 20 different amino acids, each of which has a distinct side chain with specific chemical properties. Each protein has a unique amino acid sequence which determines its 3D structure.

Discussion

2130.	The enzyme which hydrolyses triglycerides to fatty acid and glycerol is called:A. MaltoseB. LipaseC. ZymaseD. Pepsin
Answer» Correct Answer - B

Discussion

2131.	Vitamin `B_(1)` is:A. ascorbic acidB. riboflavinC. pyridoxineD. thiamine
Answer» Correct Answer - D Vitamin `B` is known as thiamine or aneurin.

Discussion

2132.	The hormone that helps in the conversion of glucose into glycogen is:A. CortisoneB. Bile acidsC. AdrenalineD. Insulin
Answer» Correct Answer - D Insulin, which is a peptide hormone, is secreted by pancrease that lower blood glucose level. It helps in the conversion of glucose into glycogen by the liver and skeletal muscle. It promotes anabolic processes and inhibits catabolic ones. Its deficiency in human beings causes diabetes mellitus. Insulin isolated from of Langerhans or islet tissue of pancreas was the first hormone to be recognized as protein.

Discussion

2133.	The hormone that helps in the conversion of glucose into glycogen is:A. cortisoneB. bile saltC. adrenalineD. insulin
Answer» Correct Answer - D Insulin is a peptide hormone and is produced in pancreas and is responsible for conversion of glucose to glycogen.

Discussion

2134.	The hormone that helps in the conversion of glucose to glycogen is …………(a) adrenaline (b) insulin (c) cortisone (d) bile acid
Answer» The hormone that helps in the conversion of glucose to glycogen is insulin

Discussion

2135.	Which of the following compound will gives smell of `NH_(3)`with conc.NaOH ?A. `CH_(3)-CH_(2)-underset(O)underset(\|\|)(C )-NH_(2)`B. `CH_(3)-underset(O)underset(\|\|)(C )-CH_(2)-NH_(2)`C. D. `CH_(3)-CH_(2)-underset(O)underset(\|\|)(C )-OH`
Answer» Correct Answer - a

Discussion

2136.	An organic compound X` (C_(4)H_(8)O_(2))` gives positive test with NaOH and phenopthalein. Structure of X will be :A. `CH_(3)-CH_(2)-CH_(2)-underset(O)underset(\|\|)(C)-OH`B. `CH_(3)-underset(O)underset(\|\|)(C)-underset(O)underset(\|\|)(C)-CH_(3)`C. `CH_(3)-underset(O)underset(\|\|)(C)-O-C_(2)H_(5)`D. `CH_(3)-underset(O)underset(\|\|)(C)-OCH_(3)`
Answer» Correct Answer - c

Discussion

2137.	Assertion `:` Haemoglobin is an oxygen carrier. Reason `:` Oxygen binds as `O_(2)` to `Fe` of haemoglobin.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.
Answer» Correct Answer - C Haemoglobin is the oxygen carrier in the human blood. It consists of four subunits and one molecule of haemoglobin can carry 4 molecules of `O_(2)`. `O_(2)` binds to `Fe` of heme part.

Discussion

2138.	Which of the following will not gives positive test with `CHCl_(3)`/KOH ?A. `CH_(3)-CH_(2)-NH-CH_(3)`B. `CH_(3)-CH_(2)-CH_(2)-NH_(3)`C. D. `CH_(3)-overset(CH_(3))overset(\|)(CH)-NH_(2)`
Answer» Correct Answer - a

Discussion

2139.	Polymer with weakest intermolecular force is :A. neopreneB. NY-66C. polystyreneD. polythene
Answer» Correct Answer - a

Discussion

2140.	Polymer with strongest intermolecular force is :A. neopreneB. NY-66C. polystyreneD. polythene
Answer» Correct Answer - d

Discussion

2141.	Polyvenyl alcohol is prepared using which starting monomer ?A. Venyl alcoholB. Venyl accetateC. Venyl cyanideD. Acrylic acid
Answer» Correct Answer - b

Discussion

2142.	Which is not used to make ropes ?A. Nylon -6B. polyproeneC. urea formaldehyde resinD. cellulose
Answer» Correct Answer - c

Discussion

2143.	Select correct statement :A. Gutta-percha is stereoregular polymer.B. Cellulose is stereoirregular polymer.C. Natural rubber is all trans polymer.D. Buna-N is random copolymer.
Answer» Correct Answer - a,b

Discussion

2144.	Examples of thermoplastic polymer is/are :A. urea formaldehyde resinB. polytheneC. polystyreneD. bakelite
Answer» Correct Answer - b,c

Discussion

2145.	Which of the following is/are present in RNA?A. AdenineB. GuanineC. CytosineD. Thymine
Answer» Correct Answer - a,b,c

Discussion

2146.	Select correct statement.A. Cane sugar is laevorotatory.B. Cane sugar is dextrarotatory.C. Invent sugar is laevorotatory.D. Invert sugar is dextrarotatory.
Answer» Correct Answer - b,c

Discussion

2147.	Selected cerrect statement :A. sucrose is a natural polymerB. polystyrene is a synthetic fiber.C. Malemine formaldehyde resin is condensation polymerD. Monomer of teflon is terephtahtic acid
Answer» Correct Answer - c

Discussion

2148.	(major) Select incorrect statement (s).A. Major product is L-lactic acid.B. Reactant is called as D-alanine.C. Reaction involves diazotization.D. Product on heating gives lactide.
Answer» Correct Answer - b

Discussion

2149.	Select incorrect opyions about polymerane :A. It is also called as styrofoam.B. It is an insulator.C. It is used as packing material.D. It is capable of showing geometrical isomerism.
Answer» Correct Answer - d

Discussion

2150.	Select incorrect statement about alanine.A. it is optically activeB. It is a `1^(@)`amino acidC. It gives purple colour with ninhydrin.D. It is one of the 20 standard amino acid.
Answer» Correct Answer - b,c

Discussion

Explore topic-wise InterviewSolutions in .

Complex lipids containsA. phosphoric acidB. phosphorous acidC. hyphophosphoric acidD. metaphosphoric acid

Which of the following is phospholipids?A. Vitamin-AB. prostaglandiansC. LecithinD. Vitamin-D

Compounds `Y` and `Z` can be : (1) A. 1 onlyB. 2,3C. 1,4D. 2,3,4

Preparation of nylon from hexamethylene diamene and adipic acid is an example of :A. addition polymerisationB. homopolymerisationC. condensation polymerisationD. copolymerisation

The secondary structure of protein is mainly due to :A. hydrogen bondsB. covalent bondsC. hydrophobicD. disulphide bonds

Which of the following bases is not present in D.N.A. ?A. UracilB. AdenineC. CytosineD. Guanine

Biuret test is used to detect:A. fatsB. sugarsC. proteinsD. waxes

The name of the dipeptide `H_(2)Nunderset(CH_(3))underset(|)(C)HCONHCH_(2)COOH`A. GlyeylglycineB. GlycineC. Glycine alanineD. Alanylglycie

The force of attractin between the neighbouring peptide chains isA. van der Waal forceB. Covalent bondC. Hydrogen bondD. Peptide linkage

A zwitterion also called as …………… ion.(a) dipolar (b) monopolar (c) tripolar (d) nonpolar

`alpha`-Amino acids behave as crystalline ionic solid and have high melting point due to the presence of :A. `-NH_(2)` groupB. `-COOH` groupC. both `-NH_(2)` and `-COOH`D. None of these

The order of decreasing acidity of these acidic sites is :A. `x gt z gt y`B. `z gt x gt y`C. `x gt y gt z`D. y gt x gt z`

In plant glycolipids sugar isA. glucoseB. fructoseC. galactoseD. mannose

Glucose The correctn statements about above structure of glucose are ,A. It is a Pyranose formB. It is a furanose formC. It is a `beta-` anomerD. It is a D-sugar

The `alpha`-amino acid which does not give purple colour in the ninhydrin test isA. prolineB. glycineC. PhenylalanineD. aspartic acid

a) Amino acids can be classified into essential amino acids and non-essential amino acids. i) What is the basis of such classification? ii) Write one example each for essential and non-essential amino acids. b) Write any two differences between DNA and RNA

Which of the following is nutritionally essential amino acid for humansA. ArginieB. Aspartic acidC. GlycineD. Phenylalanine

Proteins are important polymers of biological systems.i) What is the denaturation of proteins?ii) Give two examples of denaturation.

lsoelectric point is aA. specific temperatureB. suitable concentration of amino acidC. hydrogen ion concentration that does not allow migration of amino acid under electric fieldD. melting point of an amino acid under the influence of electric field

The correct statement in respect of protein haemoglobin is that itA. Functions as a catalyst for biological reactions.B. maintains blood sugar level.C. acts as an oxygen carrier in the blood.D. forms antibodies and offers resistance to disease.

The correct statement in respect of protein haemoglobin is that itA. Functions as catalyst for biological reactionB. Acts as an oxygen carrier in bloodC. Maintains sugar levelD. Forms antibodies and offers resistance to disease

What are reducing sugars? Give one example.

Proteins are essential for growth in animals. They are build up of amino acid molecules. How are different amino acid molecules linked in a proteins?

Amino acids show amphoteric behavior. Why?

Compare Plectonemic &amp; Paranemic Coiling.

The small nonprotein part (organic or inorganic) which is associated with the protein part of some enzymes and is required for their enzyme activity is called `a//an`A. cofactorB. coenzymeC. apoenzymeD. holoenzyme

What are Proteins?

The enzyme which hydrolyses triglycerides to fatty acid and glycerol is called:A. MaltoseB. LipaseC. ZymaseD. Pepsin

Vitamin `B_(1)` is:A. ascorbic acidB. riboflavinC. pyridoxineD. thiamine

The hormone that helps in the conversion of glucose into glycogen is:A. CortisoneB. Bile acidsC. AdrenalineD. Insulin

The hormone that helps in the conversion of glucose into glycogen is:A. cortisoneB. bile saltC. adrenalineD. insulin

The hormone that helps in the conversion of glucose to glycogen is …………(a) adrenaline (b) insulin (c) cortisone (d) bile acid

Which of the following compound will gives smell of `NH_(3)`with conc.NaOH ?A. `CH_(3)-CH_(2)-underset(O)underset(||)(C )-NH_(2)`B. `CH_(3)-underset(O)underset(||)(C )-CH_(2)-NH_(2)`C. D. `CH_(3)-CH_(2)-underset(O)underset(||)(C )-OH`

Which of the following will not gives positive test with `CHCl_(3)`/KOH ?A. `CH_(3)-CH_(2)-NH-CH_(3)`B. `CH_(3)-CH_(2)-CH_(2)-NH_(3)`C. D. `CH_(3)-overset(CH_(3))overset(|)(CH)-NH_(2)`

Polymer with weakest intermolecular force is :A. neopreneB. NY-66C. polystyreneD. polythene

Polymer with strongest intermolecular force is :A. neopreneB. NY-66C. polystyreneD. polythene

Polyvenyl alcohol is prepared using which starting monomer ?A. Venyl alcoholB. Venyl accetateC. Venyl cyanideD. Acrylic acid

Which is not used to make ropes ?A. Nylon -6B. polyproeneC. urea formaldehyde resinD. cellulose

Select correct statement :A. Gutta-percha is stereoregular polymer.B. Cellulose is stereoirregular polymer.C. Natural rubber is all trans polymer.D. Buna-N is random copolymer.

Examples of thermoplastic polymer is/are :A. urea formaldehyde resinB. polytheneC. polystyreneD. bakelite

Which of the following is/are present in RNA?A. AdenineB. GuanineC. CytosineD. Thymine

Select correct statement.A. Cane sugar is laevorotatory.B. Cane sugar is dextrarotatory.C. Invent sugar is laevorotatory.D. Invert sugar is dextrarotatory.

Selected cerrect statement :A. sucrose is a natural polymerB. polystyrene is a synthetic fiber.C. Malemine formaldehyde resin is condensation polymerD. Monomer of teflon is terephtahtic acid

(major) Select incorrect statement (s).A. Major product is L-lactic acid.B. Reactant is called as D-alanine.C. Reaction involves diazotization.D. Product on heating gives lactide.

Select incorrect opyions about polymerane :A. It is also called as styrofoam.B. It is an insulator.C. It is used as packing material.D. It is capable of showing geometrical isomerism.

Select incorrect statement about alanine.A. it is optically activeB. It is a `1^(@)`amino acidC. It gives purple colour with ninhydrin.D. It is one of the 20 standard amino acid.

Compare Plectonemic & Paranemic Coiling.