Quiz
Chem
Create a free account to finish this quiz
Save your progress and see your final score.
Already have an account? Sign in
Questions in this quiz (60)
1Which of the statements is true for the given redox pairs E0Zn2+/Zn=-0.76 V E0Cu2+/Cu = +0.34 V
- ACu2+ Is the better oxidant and in a reaction with Zn2+, it will be reduced to Cu0
- BCu2+ is the better oxidant and in a reaction with Zn0, it will be reduced to Cu0
- CZn2+ is the better oxidant and in a reaction with Cu0, it will be reduced to Zn0
- DZn0 is the better oxidant and in a reaction with Cu2+, it will be oxidised to Zn2+
2What does the term Apoenzyme mean?
- Aenzyme taking part in apoptosis
- Bnonprotein part of the enzyme
- Cprotein part of the enzyme
- Denzyme having non protein part
3Pyruvic acid, acetoacetic acid and a-ketoglutaric acids are
- AAlpha keto carboxylic acids
- Bketo carboxylic acids
- Chydroxy carboxylic acid
- Dbeta keto carboxylic acids
4Nucleoside is a structure that contains
- AAlpha ribose and nitrogen base linked with 1-4 glycosidic bond
- Bbeta ribose and nitrogen base linked with glycosidic bond
- CAlpha ribose and nitrogen base linked with 1-2 glycosidic bond
- DAlpha ribose and nitrogen base linked with 1-3 glycosidic
5the secondary structure of proteins is sustained by hydrogen bonds and polypeptide chain exists as
- Adouble helix
- Ba-helix
- Clipoprotein
- Dquaternary structure
6Which is the false statement for the reaction
- Athe equation represents direct deamination of serine
- Bthe equation represents transamination of serine
- Cpyruvic acid is the final product of the reaction
- Dammonia is released as a product
7which is the correct order by increasing acidity of the following compounds
- A1-propanol, 2-propanol, glycerol, phenol
- B2-propanol 1-propanol, glycerol, phenol
- Cphenol, glycerol, 1- propanol, 2-propanol
- Dglycerol, phenol, 2-propanol, 1-propanol
8carboxylic acid reacts with
- ACu, alcohols, aldehydes and carbohydrates
- Balkali metals, alcohols, amines and amides
- Calkali metals, thioalcohols, ammonia and PCl3
- DCu, Ketones, PCl5 and triacylglycerols
9Lactic acid reacts with
- A2-aminopropane, 2-propanol, 2-pentanone
- B2-propanol, 1- aminopropane, acetanhydride
- C2- aminopropane, 2-propanol, HNO2
- D2-aminopropane, 2-propanol, NaCl
10The structure repesents
- AAlpha - D - Glucose
- BBeta - D - Mannose
- CD - Mannose
- DAlpha - D - Mannose
11The reaction that are common for amino acids and amines are
- Areaction with aldehydes, acylation and neutralisation
- Breactions with aldehydes, akylation and esterification
- Creactions with HBr, acylation and decarboxylation
- Dreactions with HBr, acylation and alkylation
12For propanol, ethanal and glyceraldehyde is possible to
- Aundergo oxidation with Fehlings reagent and aldol reaction
- Bundergo oxidation with Fehlings reagent and Cannizzaro reaction
- Cundergo oxidation with Fehlings reagent and decarboxylation reaction
- Dundergo oxidation with Fehlings reagent and deamination reaction
13Which is the correct statement
- AAccording to Bronsted- Lowry base is an aton or ion having free electrol orbital
- BAccording to Bronsted- Lowry base is an aton or ion having free electron pair
- CAccording to Bronsted- Lowry base is an aton or ion which can accept a proton
- DAccording to Bronsted- Lowry base is an aton or ion which can donate a proton
14Which of the statement is true for the given reaction?
- AThe oxidising agent's oxidation number is 0
- BThe oxidising agent's oxidation number is +1
- CThe equillibrium shifts to the right
- DThe oxidising agent is H2
15Which of the following statements is false?
- AChelates are complexes which involve multidentate ligands
- BSalycylic acid and glycerol are multidenate ligands
- CMultidentateligands form more than one coordination bond with the central metal ion
- DChelates are multidentate ligands
16Which is the correct expression for the ion product constant of water
- AKw = ([H+])/([OH-])
- BKw = [OH-] . [H+]
- CKw = pH + pOH
- DpKw = [H+] . [OH-]
17The reaction of primary alkyl amine with HNO2 produces
- AUnstable diazonium salt that decomposes to nitroamine and hydrogen
- BStable diazonium salt, nitrosamine and hydrogen
- CUnstable diazonium salt that decomposes to alcohol and hydrogen
- DStable diazonium salt, alcohol and hydrogen
18Ascorbic acid, CoQH2 and cytochrom-Fe2+
- Aare buffers in the human body
- Bare reduced forms of the corresponding redox pairs
- Care oxidised forms of the corresponding redox pairs
- Denzymes
19Normaility shows
- Athe number of moles of the equivalents of the solute per 1000mL of solution
- Bthe percent of the equivalents of solute in 1000mL of solvent
- Cthe number of equivalents of the solute per 1000mL of solution
- Dthe percent of the solute in 100g or 100mL solution or solvent
20Triacylglycerols
- Aare a class of lipids that are esters of glycerol and stearic acid
- Bare a class of lipids that contain glycerol residue and fatty acid residue as structural units
- Care a class of lipids considered derivatives of isoprene
- Daren't lipids, they are heterocyclic compounds
21The activation energy is
- AHeat that is released during the reaction
- BHeat that is absorbed during the reaction
- CEnergy which is stored in ATP
- DEnergy that must be overcome in order for a chemical reaction to occur
22The following equation represents
- Areaction of oxidation, heterogenous catalysis
- Breaction of oxidation, homogenous catalysis
- Creaction of oxidation, auto-catalysis
- Dreaction of reduction, heterogenous catalysis
23Vitamin A, vitamin K and vitamin E are
- Aterpenes
- Bsteroid
- Csphingophospholipids
- Dglycerophospholipids
24Which of the following are biopolymers?
- Amaltose, starch, heparine
- Bsucrose, glucose, ribose
- Cglycogen, hyaluronic acid, amilose
- Dheparine, sucrose, amilose
25Which acid/base pair can serve as a buffer?
- AHCl04/ClO4-
- BNaH2PO4/ K2HPO4
- CHCl/Cl-
- DNaOH/ OH-
26For an acid pKa is 2,75. What is the pKb of its conjugate base?
- A10^-2.75
- B10^-11.25
- C- log 2.75
- D11.25
27Creatinuria is an abnormal condition in which
- Athere is excessive creatine in the urine
- Bthere is excessive creatinine in the urine
- Cthere is excessive phosphocreatine in the urine
- Dthere is excessive phosphocreatinine in the urine
28Competitive inhibitors
- Abind with some site other than active site
- Bbind with enzyme-substrate complex and form a complex which is catlytically inactive
- Cbind tightly to the active site
- Dform a complex in equilibrium with the enzyme thus substrate cannot be as rapidly converted to product
29Which of the following is the product formed between tyrsone and ethanol:
- AA
- BB
- CC
- DD
30Which of the statements is true for the following reactions
- AA salt is formed with the OH group, since HNO3 is a strong acid
- BIt is a substitution reaction, the main product is 2,4,6 - trinitrophenol
- CIt represents esterification, H2SO4 acting as a catalyst
- DIts represents oxidation, the product is quinone
31Which pair represents isomers with different acid-base properties?
- Aisomers don't differ on their acid-base properties
- BA
- CB
- DC
32pH of a solution of strong base is 9.5. What is the concentration of H+ in this solution
- Athere aren't hydrogen ions
- B[H+] = 1.10^-9.5
- C[H+] = 1.10^-4.5
- D[H+] = 1.10^9.5
33What is the chemical structure of insulin?
- Aa lipid connecting with peptide
- Ba peptide connecting with sugar
- Ca mono-chain peptide
- Dtwo chain peptide with disulfide bridges
34Which pair represents positional isomers?
- A2-pentanone and 3-pentanone
- B2-butanone and 3-butanone
- Cbutanal and 2-methylpropanal
- Dpentanal and 2-pentanone
35The isoionic point (the isoionic pH) of the peptide
- Ais the pH at which the concentration of the zwitterions is maximum
- Bis the pH at which the concentration of the zwitterions is minimum
- Cis the pH at which the net charge is positive
- Dthere is no correct answer
36Rhodopsin is
- Aa product of condensation between retinol and opsin and has an imine bond
- Ba product of condensation between retinal and opsin and has an amide bond
- Ca product of condensation between retinol and opsin and has an amide bond
- Da product of condensation between retinal and opsin and has an imine bond
37Monosaccharides form
- Astructural isomer - enantiomers, epimers and anomers
- Bgeometrical isomer - enantiomers, epimers and anomers
- Cstereo isomer - enantiomers, epimers and anomers
- Dfunctional isomer - enantiomers, epimers and anomers
38Which of the following is the correct expression for Kst of K2[HgI4]?
- AA
- BB
- CC
- DD
- AA
39Which vitamines serve as coenymes?
- Avitamin C, vitamin B1 and vitamin K
- Bvitamin B1, vitamin H and vitamin K
- Cvitamin B6, vitamin and vitamin K
- Dvitamin B1, vitamin B6 and vitamin B12
40Phenol and salicylic acid form chelates with Fe3+. The colour of these chelates
- Ais purple
- Bis red
- Cone is purple the other is red
- Dboth are colorless
41Which of the statements is true for the redox pair FAD/FADH2
- AIt takes part in the dehydrogenation of fatty acid
- BIt is involved in the dehydrogenation of ethanol to ethanoic acid
- CVitamin B3 is part of this redox pair
- DFADH2 is the oxidized form of this pair
42Which row contains the correct names for the following structures?
- AA) testosterone, B) glucose amine, C) creatinine, D) aniline
- BA) aldosterone, B) beta-ribose, C) creatinine, D) aniline
- CA) testosterone, B) beta-fructose, C) creatine, D) aniline
- DA) aldosterone, B) beta-ribose, C) creatine, D) aniline
43Which of the following statements are true for trimethyl amine:
- AIt is a stronger base compared to ethylamine, and will react with HNO2
- BIt is a weaker base compared to ethylamine, and will react with HNO2
- CIt is a stronger base compared to ethylamine and will not react with HNO2
- DIt is a weaker base compared to ethylamine and will not react with HNO2
44Reaction between two molecules of alfa-glucose produces
- Asucrose, which is a reducing sugar
- Blactose, which is a nonreducing sugar
- Camilose, which is a reducing sugar
- Dmaltose, which is a reducing sugar
45The reaction represents
- Adehydrogenation of acetyl CoA as part of b-oxidation
- Bhydration of fatty acid, as part of b-oxidation
- Coxidation of fatty acid, as part of b-oxidation
- Dthiolitic cleavage of tioester as part of b-oxidation
46Which of the statement is true for the following heterocyclic ring:
- AIt represents quinoline and is present in the structure atropine
- BIt represents quinoline and is present in the structure quinine
- CIt represents isoquinoline and is present in the structure papverine
- DIt represents quinoline and is present in the structure papverine
47Which of the statements is true for the given reaction?
- AIt occurs in the first step of transamination
- BIt leads to the formation of and imine and water
- CIt shows the formation of an imine between Vit B3 and methylamine
- DThe reaction occurs with the participation of the phosphate group and the product is phosphamide
48Salicylic acid forms
- Athree positional isomers
- Btwo positional isomers
- Cdoesn't form positional isomers
- Dtwo enantiomers
49Lyases
- Aare enzymes that catalyse non-hydrolytic addition or removal of groups
- Bare enzymes that catalyse synthesis of one large molecule from two smaller molecules
- Care enzymes that catalyse the hydrolysis of esters, glycosidic bonds in carbohydrates, and peptide bonds in proteins
- Dare enzymes that catalyse addition and removal of hydrogen
50Aldosterone is
- Amineral corticoid,causes kidney tubules to reabsorb Na+, Cl- and HCO3
- Ba male sex hormone
- Ca female sex hormone
- Dbiogenic amine
51Does the equation represent the reaction between a base and the acetate buffer?
- Ayes, it correctly represent the reaction
- Bno, the products are acetic acid and water
- Cno, the acetate ion does not react with the added base
- Dno, the acetate ion is not part of the acetate buffer
52Which of the following statements is true:
- AImidazole is a 5 membered ring present in the structure of trytophan
- BIndole is fused ring present in the structure of the alkaloid papaverine
- CIndole is a fused ring present in the structure of tryptophan
- DImidazole is a 5 membered ring present in the structure of antipyretics
53<-
- A[Cu(NH3)4]^2+ because it is more stable
- B[Cu(NH3)4]^2+ because it is less stable
- C[Cu(CN)4]^2- because it is more stable
- D[Cu(CN)4]^2- because it is less stable
54Which row represents the conjugate species of the given bases? CH3NH2, OH-, HCO3-, H2NCH2COO-
- AA
- BB
- CC
- DD
55Choose the aldehyde that would participate in the Cannizarro reaction
- A2,2 - dimethylbutanal
- B2-methylbutanal
- C2,3-dimethylbutanal
- D3,3-dimethylbutanal
56The name methyl salicylate is referred to
- Aan acid chloride of salicylic acid
- Ba salt of salicylic acid
- Can ester of salicylic acid formed with its hydroxyl group
- Dan ester of salicylic acid formed with its carboxyl group
57Caffeine is a central nervous system stimulator and it has as structural unit
- Aquinoline
- Bimidazole
- Cpurine
- Disoquinoline
58Arrhenius equation gives the relation between the rate constant and activation energy and temperature. According to the equation
- Arate constant is directly proportional to the activation energy
- Brate constant is directly proportional to the temperature
- Crate constant is reversely proportional to the activation energy and temperature
- Drate constant is directly proportional to the activation energy and temperature
59Which of the following fatty acids is natural
- ACH3 - (CH2)13 - CH2 - COOH
- BCH3 - (CH2)14 - CH2 - COOH
- CCH3 - (CH2)16 - CH2 - COOH
- DCH3 - (CH2)18 - CH2 - COOH
60Which test can be used to prove presence of methionine in a polypeptide chain?
- Alead-sulfide reaction
- Blegals test
- Cninhydrin reaction
- Dbiuret test
Information
- Description
- Quiz on Chem, created by lu lucy on 22/09/2020.
- Author
- lu lucy
- Language
- English
- Views
- 3
- Rating
- No ratings yet Rate this quiz