3593 + Interview Questions in BIOMOLECULES IN GENERAL AWARENESS Page 15 InterviewSolution

701.	Study the given data and answer the questions that follow. A sample of an enzyme called lactase was isolated from the intestinal lining of a calf. Assays were undertaken to evaluate the activity of the enzyme sample. The substrate of lactase is the disaccharide lactose. Lactase breaks a lactose molecule in two, producing a glucose molecule and a galactose molecule. Two assays were carried out. `{:("Lactose concentration (% w/v)",15,15,15,15,15,15),("Concentration of enzyme smaple (%v/v)",0,5,10,15,20,25),("Reaction rate "mu"mole glucose "sec^(-1)mL^(-1),0,25,50,75,100,125):}` `{:("Lactose concentration (% w/v)",0,5,10,15,25,30),("Concentration of enzyme smaple (%v/v)",5,5,5,5,5,5),("Reaction rate "mu"mole glucose "sec^(-1)mL^(-1),0,15,25,35,40,40):}` What are the variables in each of the two assays ?A. `{:(" ""Assay"1," ""Assay"2),("Lactose concentration", "Conentration of enzyme sample"):}B. `{:(" ""Assay"1," ""Assay"2),("Concentration of enzyme sample", "Lactose concentration"):}`C. `{:(" ""Assay"1," ""Assay"2),("Lactose concentration", "Lactose concentration"):}`D. `{:(" ""Assay"1," ""Assay"2),("Conentration of enzyme sample", "Conentration of enzyme sample"):}`
Answer» Correct Answer - B

Discussion

702.	Study the given data and answer the questions that follow. A sample of an enzyme called lactase was isolated from the intestinal lining of a calf. Assays were undertaken to evaluate the activity of the enzyme sample. The substrate of lactase is the disaccharide lactose. Lactase breaks a lactose molecule in two, producing a glucose molecule and a galactose molecule. Two assays were carried out. `{:("Lactose concentration (% w/v)",15,15,15,15,15,15),("Concentration of enzyme smaple (%v/v)",0,5,10,15,20,25),("Reaction rate "mu"mole glucose "sec^(-1)mL^(-1),0,25,50,75,100,125):}` `{:("Lactose concentration (% w/v)",0,5,10,15,25,30),("Concentration of enzyme smaple (%v/v)",5,5,5,5,5,5),("Reaction rate "mu"mole glucose "sec^(-1)mL^(-1),0,15,25,35,40,40):}` Which of the following assays would you expect to have the highest reaction rate ?A. `{:("Lactose concentration (%w/v)","Concentration of enzyme sample (%v/v)"2),(" "15, " "5):}`B. `{:("Lactose concentration (%w/v)","Concentration of enzyme sample (%v/v)"2),(" "30, " "5):}`C. `{:("Lactose concentration (%w/v)","Concentration of enzyme sample (%v/v)"2),(" "15, " "25):}`D. `{:("Lactose concentration (%w/v)","Concentration of enzyme sample (%v/v)"2),(" "30, " "25):}`
Answer» Correct Answer - C

Discussion

703.	Which is an organic compound found in most cells ?A. glucoseB. waterC. sodium chlorideD. oxygen
Answer» Correct Answer - A

Discussion

704.	Enzymes that catalyse inter-conversion of optical, geometrical or positional isomers areA. ligasesB. lyasesC. hydrolasesD. isomerases
Answer» Correct Answer - D

Discussion

705.	Bee wax mainly consists ofA. myricyl palmitateB. myricyl cerotateC. cetyl palmitateD. none of these
Answer» Correct Answer - A

Discussion

706.	Lecthin and cephalins areA. nucleic acidB. phospholipidC. carbohydrateD. sphingolipids
Answer» Correct Answer - B

Discussion

707.	About 98 percent of the mass of every living organisms is composed of just six elements including carbon, hydrogen, nitrogen, oxygen andA. sulphur and magnesiumB. magnesium and sodiumC. calcium and phosphorusD. phosphorus and sulphur
Answer» Correct Answer - D

Discussion

708.	Which of the following is polymer of D-glucose?A. StarchB. SurcoseC. CelluloseD. Cellobiose
Answer» Correct Answer - a, c (b) and (d) are not polymers.

Discussion

709.	Which of the following on hydrolysis will give a product with specifice rotation of `+52.7^(@)` ?A. maltoseB. cellobioseC. sucroseD. cellulose
Answer» Correct Answer - a,b,d On hydrolysis (a), (b) and (d) all give equilibrium mixture of `alpha`-D-glucose,`beta`-D-glucose and open chain D-glucose with sp.rotation `+52.7^(@)` whereas sucrose give equimolar mixture of D-glucose and D-fructose with sp. Rotation `-20^(@)`.

Discussion

710.	A trisaccharide isA. stachyroseB. sucroseC. raffinoseD. ribose
Answer» Correct Answer - C

Discussion

711.	Magnesium is an important component of which biomolecule occuring extensively in living world?A. HaemoglobinB. ChlorophyllC. VitaminD. ATP
Answer» Correct Answer - B

Discussion

712.	Proteins which catalyse biochemical reactions in the living world are known asA. EnzymesB. HormonesC. AnlibodiesD. Receptor
Answer» Correct Answer - A

Discussion

713.	Most of the biochemical reaction differ from those occuring in the non-living world inA. Requiring energyB. Releasing energyC. Being enzymaticD. Being spontaneous
Answer» Correct Answer - C (c) Biochemical reaction of living beings are different from non-living world because in non-living beings, catalysts of reactions aremostly inorganic metals.

Discussion

714.	Assertion : Enzymes lower the activation energy. Reason : A substrate molecule can be acted upon by a particular enzyme.A. If both the asseration and the reason are true and the reason is a correct explanation of the assertionB. If both the assertion and rreason are true but the reason not a correct explanation of the assertionC. If the assertion is true but the reason is falseD. If the assertion is false but reason is true
Answer» Correct Answer - B (b) Activation energy is an external supply of energy which is needed for the initiation of the chemical reaction. Activation energy required for such a large number of reactions cannot be provided by living systems. Enzymes lower the activation energy required for a reaction Enzymes are generally specific for their substrates.

Discussion

715.	Assertion : Specific substrate binds at the active site of the enzyme . Reason : Enzymes increase the activation energy of substrate .A. If both assertion and Reason are true and the Reason is the correct explanation of the assertion .B. If both Assertion and Reason ate true , but the reason is not the correct explanation of the assertion .C. If Assertion is true , but Reason is falseD. if both Assertion and Reason are false.
Answer» Correct Answer - C

Discussion

716.	Assertion : Enzymes lower the activation energy. Reason : A substrate molecule can be acted upon by a particular enzyme.A. If both assertion and reason are true and the reason is the correct explanation of the assertionB. If both assertion and reason are true and the reason is not the correct explanation of the assertionC. If assertion is true but reason is falseD. If both assertion and reason are false
Answer» Correct Answer - B

Discussion

717.	Which one of the following statements about cytochrome `P_(450)` is wrongA. It contains ironB. It is a coloured cellC. It has an important role in metabolismD. It is an enzyme involved in oxidation reactions
Answer» Correct Answer - B Cytochrome is not a coloured cell, instead this is a respiratory pigment-mixture of iron and protein which are electron acceptors. Cytochrome are membrane bound hemeproteins contains heme groups and are primarily responsible for the generation of ATP via electron transport.

Discussion

718.	in the genetic code dictionary , how many codons are used to code for all the 20 essenital amino acids?A. 20B. 64C. 61D. 60
Answer» Correct Answer - C

Discussion

719.	A non-protein organic part attached firmly by covalent linkage to apoenzyme isA. CofactorB. CoenzymeC. Prosthetic groupD. Activator
Answer» Correct Answer - C (C) A non-protein organic part attached firmly by covalent linkage to apoenzyme is prosthetic group.

Discussion

720.	Give an example of metallo-protein.
Answer» Iron in ferritin.

Discussion

721.	When inorganic ions or metallo-organic molecules bind to apoenzyme, they together form (a) isoenzyme (b) holoenzyme (c) denatured enzyme (d) none of these
Answer» (b) holoenzyme

Discussion

722.	Organic compounds that are tightly bound to apoenzyme isA. Prosthetic groupB. ApoenzymeC. Metal ionsD. Co-enzymes
Answer» Correct Answer - A

Discussion

723.	Apoenzyme isA. Always a proteinB. Often s metalC. Always an inorganic compoundD. Often a vitamin
Answer» Correct Answer - A

Discussion

724.	Apoenzyme isA. ProteinB. Amino acidC. VitaminsD. AGU
Answer» Correct Answer - A (A) Apoenzyme is protein.

Discussion

725.	In a 100 g living tissue, the amount of water would beA. 15-25 gB. 25-30 gC. 35-45 gD. 70-90 g
Answer» Correct Answer - D (D) In a 100g living tissue, the amount of water would be 70-90g (i.e., 70 to 90% ).

Discussion

726.	Crabohydrates, the most abundant biomlecles on earth, are produced byA. some bacteria , algae , and green plant cellsB. Fungi , algae , and green plant cellsC. All bacteria , fungi , and algaeD. Viruses , fungi , and algae
Answer» Correct Answer - A

Discussion

727.	Differentiate primary, secondary and tertiary structure of protein.
Answer» I. In primary structure specific sequence of amino acids are joined by covalent bonds. II. secondary structure is responsible for the shape of a protein. α-helix and β-pleated in which polypeptide chains have peptide linkages. III. tertiary structure represents overall folding of polypeptide chain and give rise to the fibrous or globular molecular shape.

727.

Differentiate primary, secondary and tertiary structure of protein.

Answer»

I. In primary structure specific sequence of amino acids are joined by covalent bonds.

II. secondary structure is responsible for the shape of a protein. α-helix and β-pleated in which polypeptide chains have peptide linkages.

III. tertiary structure represents overall folding of polypeptide chain and give rise to the fibrous or globular molecular shape.

Discussion

728.	What are the various types of nitrogen bases found in DNA ? Name the type of bond seen between (i) two nitrogen bases of DNA (ii) phosphate and hydroxyl group of sugar of DNA.
Answer» Types of nitrogenous bases found in DNA are: (a) Adenine : Abbreviated 'A', has a 2-ring structure, so that it is a purine. (b) Thymine: Abbreviated T, is a pyrimidine, which. means it has a 1-ring structure. It's only present in DNA, where it pairs with adenine. (c) Guanine: Abbreviated 'G', is part of both DNA, where it bonds with cytosine. (d) Cytosine : abbreviated C, is part of DNA and bonds with guanine. It has one ring, so it's a pyrimidine. (i) Hydrogen bond (ii) Phosphodiester bond

728.

What are the various types of nitrogen bases found in DNA ? Name the type of bond seen between (i) two nitrogen bases of DNA (ii) phosphate and hydroxyl group of sugar of DNA.

Answer»

Types of nitrogenous bases found in DNA are:

(a) Adenine : Abbreviated 'A', has a 2-ring structure, so that it is a purine.

(b) Thymine: Abbreviated T, is a pyrimidine, which. means it has a 1-ring structure. It's only present in DNA, where it pairs with adenine.

(c) Guanine: Abbreviated 'G', is part of both DNA, where it bonds with cytosine.

(d) Cytosine : abbreviated C, is part of DNA and bonds with guanine. It has one ring, so it's a pyrimidine.

(i) Hydrogen bond

(ii) Phosphodiester bond

Discussion

729.	Describe the primary, secondary and tertiary structure of a protein ?
Answer» (i) Primary Structure : The linear sequence of amino acids units in a polypeptide chain is called the primary structure of protein molecule. Ribonuclease an enzyme, is a protein with primary structure only. (ii) Secondary Structure : The polypetides chain that forms a 3-dimensional structure, is called as secondary structure. It possess three forms : (a) α helix: The coils of helix are held together by hydrogen bonds between amino acids. (b) β helix : More than one chain lie side by side joined together by hydrogen bonds between the carboxyl group of amino acids. (c) Collagen proteins: It is a right handed super helix formed by the twisting of three helices of polypeptide chains interwined with each other. (iii) Tertiary Structure : The tertiary structure of protein brings distant amino acid side, chains nearer to form active sites of enzyme proteins. The tertiary structure is maintained by weak bonds, such as hydrogen, ionic and hydrophilic hydrophobic bonds, formed between one part of a polypeptide and another The biological activity of a protein molecule depends largely on the specific tertiary structure Tertiary structure is found in globular proteins.

729.

Describe the primary, secondary and tertiary structure of a protein ?

Answer»

(i) Primary Structure : The linear sequence of amino acids units in a polypeptide chain is called the primary structure of protein molecule. Ribonuclease an enzyme, is a protein with primary structure only.

(ii) Secondary Structure : The polypetides chain that forms a 3-dimensional structure, is called as secondary structure. It possess three forms :

(a) α helix: The coils of helix are held together by hydrogen bonds between amino acids.

(b) β helix : More than one chain lie side by side joined together by hydrogen bonds between the carboxyl group of amino acids.

(c) Collagen proteins: It is a right handed super helix formed by the twisting of three helices of polypeptide chains interwined with each other.

(iii) Tertiary Structure : The tertiary structure of protein brings distant amino acid side, chains nearer to form active sites of enzyme proteins. The tertiary structure is maintained by weak bonds, such as hydrogen, ionic and hydrophilic hydrophobic bonds, formed between one part of a polypeptide and another The biological activity of a protein molecule depends largely on the specific tertiary structure Tertiary structure is found in globular proteins.

Discussion

730.	Which one of the following is mainly required for blood clotting?(a) Vitamin E (b) Vitamin B (c) Vitamin C (d) Vitamin K
Answer» (d) Vitamin K

Discussion

731.	Which vitamin deficiency leads to the disease osteomalacia? (a) Vitamin D (b) Vitamin A (c) Vitamin C (d) Vitamin K
Answer» (a) Vitamin D

Discussion

732.	The deficiency of Vitamin B leads to the disease ………… (a) convulsions (b) beriberi (c) Pernicious anaemia (d) pellagra
Answer» (c) Pernicious anaemia

Discussion

733.	Recognize the compounds from their common names given below : (i) Grape sugar (ii) Fruit sugar (iii) Brain sugar (iv) Malt sugar (v) Cane or table sugar (vi) Milk sugar (vii) Plant sterol or phytoerol (viii) Earwax (ix) Wool fat.
Answer» (i) Glucose (ii) Fructose (iii) Galactose (iv) Maltose (v) Sucrose (vi) Lactose (vii) Ergosterol (viii) Cerumen (ix) Lanolin.

Discussion

734.	Which vitamin deficiency leads to the disease megaloblastic anaemia? (a) Vitamin B9 (b) Vitamin B6 (c) Vitamin B12 (d) Vitamin B2
Answer» (a) Vitamin B₉

Discussion

735.	Identify the vitamin whose deficiency in our food decreases reproductive power :A. vitamin `A`B. vitamin `C`C. vitamin `D`D. vitamin `E`
Answer» Correct Answer - D

Discussion

736.	Nervousness anaemia is caused by the deficiency of vitaminA. `B_(1)`B. `B_(2)`C. `B_(6)`D. `B_(12)`
Answer» Correct Answer - D

Discussion

737.	The deficiency of vitamin `C` casuse:A. ScurvyB. RicketsC. PyrroheaD. Pernicious anaemia
Answer» Correct Answer - A

Discussion

738.	Ribofavin deficiency causes:A. scurvyB. pellagraC. beri-beriD. cheilosis
Answer» Correct Answer - D

Discussion

739.	Deficiency of vitamin A result in :A. scurvyB. night blindnessC. beri-beriD. rickets
Answer» Correct Answer - B

Discussion

740.	Calorific value is in the order:A. Fats`gt` protein `gt` CarbohydratesB. Carbohydrates `gt` Fats `gt` ProteinC. Fats `gt` Carbohydrates `gt` ProteinD. Protein `gt` Fats `gt` Carbohydrates
Answer» Correct Answer - C

Discussion

741.	Calorific value is in the orderA. Fats gt Carbohydrates gt ProteinsB. Carbohydrates gt Fats gt ProteinsC. Proteins gt Carbohydrates gt FatsD. Fats gt Proteins gt Carbohydrates
Answer» Correct Answer - A Fats gt Carbohydrates gt Proteins

Discussion

742.	Calorific value is in the order:A. fatsgtgt carbohydrates gtgt proteinsB. Carbohydrates gtgt fats gtgt proteinsC. Proteins gtgtcarbohydrates gtgt fatsD. Fats gtgt proteins gtgtcarbohydrates
Answer» Correct Answer - A Correct order of calorific values Fats gtCarbohydrates gt proteins

Discussion

743.	All enzymes areA. either pure or conjugated proteinsB. pure proteinsC. conjugated proteinsD. inorganic catalysts
Answer» Correct Answer - A

Discussion

744.	Quarternary structure of protein isA. arrangement of amino acids in polypeptide chainB. inter-relationship of amino in a polypeptide chainC. inter-relation between polypeptide chains of a protein having more than two polypeptide chainsD. all of the above
Answer» Correct Answer - C

Discussion

745.	Correct order of calorific value isA. Carbohydrates `gt` Fats `gt` ProteinsB. Fats `gt` Carbohydrates `gt` ProteinsC. Proteins `gt` Carbohydrates `gt` FatsD. Fats `gt` Proteins `gt` Carbohydrates
Answer» Correct Answer - B

Discussion

746.	The most concentrated source of energy in the human body isA. FatsB. SugarsC. ProteinsD. Nuclei acids
Answer» Correct Answer - A The most concentrated source of energy in the human body is fats.

Discussion

747.	Oils and fats are esters of higher fatty acids with :A. glycerolB. glycolC. alcoholD. ethers
Answer» Correct Answer - A

Discussion

748.	The chief constituents of coil membrances are :A. Simple triglyceridesB. WaxesC. PhospholipidsD. Proteins
Answer» Correct Answer - C The chief constituents of cell membranes are phospholipids.

Discussion

749.	The relationship between the nucleotide triplets and the amino acid is called.A. GeneB. NucleosideC. Genetic codeD. Gene pool
Answer» Correct Answer - C

Discussion

750.	Oils and fats are esters of higher fatty acids with :A. EthanolB. GlycolC. GlycerolD. Methanol
Answer» Correct Answer - C Oils and fats are esters of higher fatty acids with Glycerol.

Discussion

Explore topic-wise InterviewSolutions in .

Which is an organic compound found in most cells ?A. glucoseB. waterC. sodium chlorideD. oxygen

Enzymes that catalyse inter-conversion of optical, geometrical or positional isomers areA. ligasesB. lyasesC. hydrolasesD. isomerases

Bee wax mainly consists ofA. myricyl palmitateB. myricyl cerotateC. cetyl palmitateD. none of these

Lecthin and cephalins areA. nucleic acidB. phospholipidC. carbohydrateD. sphingolipids

About 98 percent of the mass of every living organisms is composed of just six elements including carbon, hydrogen, nitrogen, oxygen andA. sulphur and magnesiumB. magnesium and sodiumC. calcium and phosphorusD. phosphorus and sulphur

Which of the following is polymer of D-glucose?A. StarchB. SurcoseC. CelluloseD. Cellobiose

Which of the following on hydrolysis will give a product with specifice rotation of `+52.7^(@)` ?A. maltoseB. cellobioseC. sucroseD. cellulose

A trisaccharide isA. stachyroseB. sucroseC. raffinoseD. ribose

Magnesium is an important component of which biomolecule occuring extensively in living world?A. HaemoglobinB. ChlorophyllC. VitaminD. ATP

Proteins which catalyse biochemical reactions in the living world are known asA. EnzymesB. HormonesC. AnlibodiesD. Receptor

Most of the biochemical reaction differ from those occuring in the non-living world inA. Requiring energyB. Releasing energyC. Being enzymaticD. Being spontaneous

Which one of the following statements about cytochrome `P_(450)` is wrongA. It contains ironB. It is a coloured cellC. It has an important role in metabolismD. It is an enzyme involved in oxidation reactions

in the genetic code dictionary , how many codons are used to code for all the 20 essenital amino acids?A. 20B. 64C. 61D. 60

A non-protein organic part attached firmly by covalent linkage to apoenzyme isA. CofactorB. CoenzymeC. Prosthetic groupD. Activator

Give an example of metallo-protein.

When inorganic ions or metallo-organic molecules bind to apoenzyme, they together form (a) isoenzyme (b) holoenzyme (c) denatured enzyme (d) none of these

Organic compounds that are tightly bound to apoenzyme isA. Prosthetic groupB. ApoenzymeC. Metal ionsD. Co-enzymes

Apoenzyme isA. Always a proteinB. Often s metalC. Always an inorganic compoundD. Often a vitamin

Apoenzyme isA. ProteinB. Amino acidC. VitaminsD. AGU

In a 100 g living tissue, the amount of water would beA. 15-25 gB. 25-30 gC. 35-45 gD. 70-90 g

Crabohydrates, the most abundant biomlecles on earth, are produced byA. some bacteria , algae , and green plant cellsB. Fungi , algae , and green plant cellsC. All bacteria , fungi , and algaeD. Viruses , fungi , and algae

Differentiate primary, secondary and tertiary structure of protein.

What are the various types of nitrogen bases found in DNA ? Name the type of bond seen between (i) two nitrogen bases of DNA (ii) phosphate and hydroxyl group of sugar of DNA.

Describe the primary, secondary and tertiary structure of a protein ?

Which one of the following is mainly required for blood clotting?(a) Vitamin E (b) Vitamin B (c) Vitamin C (d) Vitamin K

Which vitamin deficiency leads to the disease osteomalacia? (a) Vitamin D (b) Vitamin A (c) Vitamin C (d) Vitamin K

The deficiency of Vitamin B leads to the disease ………… (a) convulsions (b) beriberi (c) Pernicious anaemia (d) pellagra

Recognize the compounds from their common names given below : (i) Grape sugar (ii) Fruit sugar (iii) Brain sugar (iv) Malt sugar (v) Cane or table sugar (vi) Milk sugar (vii) Plant sterol or phytoerol (viii) Earwax (ix) Wool fat.

Which vitamin deficiency leads to the disease megaloblastic anaemia? (a) Vitamin B9 (b) Vitamin B6 (c) Vitamin B12 (d) Vitamin B2

Identify the vitamin whose deficiency in our food decreases reproductive power :A. vitamin `A`B. vitamin `C`C. vitamin `D`D. vitamin `E`

Nervousness anaemia is caused by the deficiency of vitaminA. `B_(1)`B. `B_(2)`C. `B_(6)`D. `B_(12)`

The deficiency of vitamin `C` casuse:A. ScurvyB. RicketsC. PyrroheaD. Pernicious anaemia

Ribofavin deficiency causes:A. scurvyB. pellagraC. beri-beriD. cheilosis

Deficiency of vitamin A result in :A. scurvyB. night blindnessC. beri-beriD. rickets

Calorific value is in the order:A. Fats`gt` protein `gt` CarbohydratesB. Carbohydrates `gt` Fats `gt` ProteinC. Fats `gt` Carbohydrates `gt` ProteinD. Protein `gt` Fats `gt` Carbohydrates

Calorific value is in the orderA. Fats gt Carbohydrates gt ProteinsB. Carbohydrates gt Fats gt ProteinsC. Proteins gt Carbohydrates gt FatsD. Fats gt Proteins gt Carbohydrates

Calorific value is in the order:A. fatsgtgt carbohydrates gtgt proteinsB. Carbohydrates gtgt fats gtgt proteinsC. Proteins gtgtcarbohydrates gtgt fatsD. Fats gtgt proteins gtgtcarbohydrates

All enzymes areA. either pure or conjugated proteinsB. pure proteinsC. conjugated proteinsD. inorganic catalysts

Quarternary structure of protein isA. arrangement of amino acids in polypeptide chainB. inter-relationship of amino in a polypeptide chainC. inter-relation between polypeptide chains of a protein having more than two polypeptide chainsD. all of the above

Correct order of calorific value isA. Carbohydrates `gt` Fats `gt` ProteinsB. Fats `gt` Carbohydrates `gt` ProteinsC. Proteins `gt` Carbohydrates `gt` FatsD. Fats `gt` Proteins `gt` Carbohydrates

The most concentrated source of energy in the human body isA. FatsB. SugarsC. ProteinsD. Nuclei acids

Oils and fats are esters of higher fatty acids with :A. glycerolB. glycolC. alcoholD. ethers

The chief constituents of coil membrances are :A. Simple triglyceridesB. WaxesC. PhospholipidsD. Proteins

The relationship between the nucleotide triplets and the amino acid is called.A. GeneB. NucleosideC. Genetic codeD. Gene pool

Oils and fats are esters of higher fatty acids with :A. EthanolB. GlycolC. GlycerolD. Methanol