Polymerisation & Biomolecules Quiz 1

1 / 67

Which catalyst is commonly used in coordination chain polymerization?

platinum

ziegler- Natta catalyst

zeolite

nickel

2 / 67

Which of the following copolymers is the copolymer with regular alternating A and B units?

Alternating copolymer

Statistical copolymer

Periodic copolymer

Block copolymer

3 / 67

Which of the following nitrogenous base is not present in RNA?

cytosine

guanine

adenine

thymine

4 / 67

Animals store glucose in the form of which macromolecule?

Glycogen

Glycerol

Cellulose

Amylose

5 / 67

Which of the following is polymer formed by step-growth polymerization is not classified under condensation polymerisation?

Polyester

Polyurethane

Polyamide

Polysiloxane

6 / 67

What term is used to describe the process by which DNA is copied to produce two daughter DNA molecules?

transcription

reproduction

translation

replication

7 / 67

Which of the following copolymers is the copolymer with several polymer chains connected to a central core?

Graft copolymer

Star copolymer

Statistical copolymer

Terepolymer copolymer

8 / 67

Which of the following copolymers is the copolymer which comprises two or more homopolymer subunits linked by covalent bonds?

Alternating copolymer

Statistical copolymer

Periodic copolymer

Block copolymer

9 / 67

In the formation of a macromolecule, what type of reaction would join two subunits together?

Denaturation reaction

Dehydration reaction

Hydrophobic reaction

Hydrolysis reaction

10 / 67

Which of the following is not a disaccharide?

Maltose

Lactose

Amylose

Sucrose

11 / 67

To which of the following does guanine form hydrogen bonds in DNA?

cytosine

thymine

adenine

guanine

12 / 67

In the formation of a macromolecule, what type of bond would join two amino acid subunits?

Ionic bond

Hydrogen bond

Phosphodiester bond

Peptide bond

13 / 67

Which of the following happens in initiation step of the free radical polymerisation?

Decomposition of initiator

Disproportionation

Renewal of inhibitor

Addition of monomer molecules to the growing chains

14 / 67

What is the trend in the molecular weight of step growth polymer at lower conversion and higher conversion respectively?

Increase then decrease

Can?t say about molecular weight

Decreases an increases

Remains same

15 / 67

Which amino acid can form disulphide bonds?

Proline

Valine

Leucine

Cysteine

16 / 67

There are several levels of protein structure, which is the most complex protien?

Tertiary

Secondary

Quaternary

Primary

17 / 67

Nucleic acids are chains of 5-carbon sugars linked by which type of bonds with an organic base protruding from each sugar?

Carbonyl

Amino

Phophodiester

Phosphate

18 / 67

Which catalyst is used for the coordination polymerisation of polybutadiene?

neodymium-based catalyst

kaminsky catalyst

organo-aluminium co-catalyst

titanium tetrachloride organo-aluminium co-catalyst

19 / 67

Which monomers are required for the formation of Bakelite via a typical step-growth polymerization?

ester and phenol

isocyanate and alcohol

phenol and formaldehyde

diamine and formaldehyde

20 / 67

What term is used to describe the process by which a segment of DNA is copied to produce a molecule of messenger RNA?

translation

replication

reproduction

transcription

21 / 67

Which of the following happens in termination step of the free radical polymerisation?

addition of free radical to monomer

addition of monomer molecules to the growing chains

disproportionation

decomposition of initiator

22 / 67

Which of the following is the condition for ideal copolymerization?

r1=1

r1r2=1

r1r2=0

r1=r2

23 / 67

Which of the following copolymers is the copolymer with sequence of monomer residues follows a statistical rule?

Block copolymer

Statistical copolymer

Alternating copolymer

Periodic copolymer

24 / 67

Proteins, which are tremendously complex molecules, what are their basic units or building blocks?

Amino acids

Polypeptides

NH2

Carbohydrates

25 / 67

Formation of polytriazole polymers via step-growth polymerization is produced from which of the following monomers?

Compound which bears both alkene and azide functional group

Compound which bears both alkyne and azide functional group

Compound which bears both vinyl and azide functional group

Compound which bears both alkane and azide functional group

26 / 67

In double helix of DNA, the two DNA strands show which type of characteristics?

coiled around a common axis

coiled differently

coiled around each other

coiled over protein sheath

27 / 67

What is the name for polymers with Z groups only on one side of the carbon chain?

Syndiotactic

Isotactic

Enatiometric

Atactic

28 / 67

What type of macromolecule carries out catalysis in biological systems?

carbohydrates called starches

nucleic acids called DNA

lipids called steroids

proteins called enzymes

29 / 67

What happens when a macromolecule undergoes hydrolysis reaction?

a bond is formed between two subunits of a macromolecule

protein coils into its secondary structure

water breaks ionic bonds

the bond between two subunits of a macromolecule is broken

30 / 67

Which of the following happens in propagation step of the free radical polymerisation?

Addition of monomer molecules to the growing chains

Renewal of inhibitor

Decomposition of initiator

Disproportionation

31 / 67

Macromolecule described as large molecules built up from small repeating units called as which of the following?

Dimers

Biopolymer

Monomers

Metamers

32 / 67

Which of the following reagents may be used to initiate radical polymerization of styrene?

Hydroxide ion

Peroxides

HCl

BF3

33 / 67

Which of the following statements about amino acids is correct?

Amino acids in proteins are mainly in the D-configuration

Twenty four amino acids are commonly used in protein synthesis

Amino acids are uncharged at neutral pH

Amino acids are classified according to the structures and properties of their side chains

34 / 67

Which of the following amino acid is a limiting amino acid in pulses?

Lysine

Leucine

Glutamine

Methionine

35 / 67

What amino acid is coded by the triplet of bases UAU?

cysteine

serine

phenylalanine

tyrosine

36 / 67

DNA is composed of repeating units of ___________

ribonucleotides

deoxyribonucleotides

deoxyribonucleosides

ribonucleosides

37 / 67

To which of the following does thymine form hydrogen bonds in DNA?

cytosine

adenine

thymine

guanine

38 / 67

Which of the following is not prepared by Ziegler-Natta coordination polymerisation?

Ultrahigh molecular weight Polyethylene (UHMWPE)

Polyvinyl acetate (PVAc)

High density Polyethylene (HDPE)

Ethylene-1-alkenebcopolymer (linear low density polyethylene, LLDPE)

39 / 67

Lipids are insoluble in water because of which of the following reason?

lipid molecules are hydrophobic

lipid molecules are hydrophilic

lipid molecules are neutral

lipid molecules are zwitterions

40 / 67

Which of the following is not true about step growth polymerisation?

Molar mass of backbone chain increases rapidly at early stage and remains approximately the same throughout the polymerization

Rapid loss of monomer early in the reaction

Similar steps repeated throughout reaction process

Initiator are required for the step growth polymerisation

41 / 67

A nucleoside is formed of which of the following units?

nitrogen base, sugar and phosphate

sugar and phosphate

nitrogen base and phosphate

nitrogen base and sugar

42 / 67

A nucleotide is formed of which of the following units?

nitrogen base, sugar and phosphate

nitrogen base and phosphate

sugar and phosphate

nitrogen base and sugar

43 / 67

Which of the following amino acids is mostly likely to disrupt an alpha helix?

Leucine

Proline

Valine

Glycine

44 / 67

Glycine and proline are the most abundant amino acids in which of the following structure?

Insulin

Collagen

Hemoglobin

Myoglobin

45 / 67

Titanium tetrachloride organoaluminium co-catalyst is used in which of the following polymerisation?

Anionic vinyl polymerization

Free-radical polymerization

Ziegler-Natta polymerization

Metathesis polymerization

46 / 67

Which of the following is true about Step-growth polymerisation?

monomers react by eliminating small molecules like H2O, NH3, CH2O and NaCl in a repetitive manner, Indefinite growth of the polymer occurs at both ends

monomers react to form first dimers, then trimmers, longer oligomers and eventually long chain polymers

polymerization that is catalysed by transition metal salts and complexes

radical, coordination, anionic, or cationic polymerization, depending on the type of initiation

47 / 67

Which of the following copolymers is the copolymer consisting of three distinct monomers?

Star copolymer

Statistical copolymer

Graft copolymer

Terepolymer copolymer

48 / 67

Which of the following is true about copolymerisation?

monomers react by eliminating small molecules like H2O, NH3, CH2O and NaCl in a repetitive manner, Indefinite growth of the polymer occurs at both ends

a mixture of more than one (or different) monomeric species is allowed to polymerize

addition of monomer to a metal complex, propagation is by successive insertion of monomer at the metal, and termination occurs when the metal complex separates from the polymer

radical, coordination, anionic, or cationic polymerization, depending on the type of initiation

49 / 67

Which of the characteristics below apply to amino acid Glycine?

Optically inactive

Hydrophobic

Hydrophilic, acidic and charged

Hydrophilic, basic and charged

50 / 67

Which of the following is true about coordination polymerisation?

a mixture of more than one (or different) monomeric species is allowed to polymerize

polymerization that is catalysed by transition metal salts and complexes

monomers react by eliminating small molecules like H2O, NH3, CH2O and NaCl in a repetitive manner, Indefinite growth of the polymer occurs at both ends

radical, coordination, anionic, or cationic polymerization, depending on the type of initiation

51 / 67

Why is vinyl polymerization also known as addition polymerization?

most monomers contain (CH2=CH?) group

it is a chain reaction

it proceeds through radical

monomers are unsaturated compounds

52 / 67

In which of the following groups are all polysaccharides?

sucrose, glucose and fructose

glycogen, sucrose and maltose

maltose, lactose and fructose

glycogen, cellulose and starch

53 / 67

Amylose is soluble in which of the following solvent?

Alcohol

Partially soluble in alcohol

Soluble in acidic solution

Water

54 / 67

Which of the following is true about homogenous Ziegler Natta polymerisation?

This is based on neodymium-based catalyst

This is based on titanium tetrachloride organoaluminium co-catalyst

This is based on Kaminsky catalyst

This is based on organoaluminium co-catalyst

55 / 67

What are the most diverse macromolecules in the cell?

carbohydrates

proteins

mineral salts

lipids

56 / 67

Which of the following copolymers is the copolymer in which the main chain is formed from one type of monomer A and branches are formed from another monomer B?

Graft copolymer

Terepolymer copolymer

Star copolymer

Statistical copolymer

57 / 67

Carbohydrates are polyhydroxy compounds of _______________

Oligosaccharides

Aldehyde and ketone

Glucose

Glyceraldehyde

58 / 67

Assuming that all of the below given compound had the same number of carbon atoms, which of the following has the most C-H bonds?

Unsaturated fat

Polysaccharide

Polysaturated fat

Saturated fat

59 / 67

Dehydration and hydrolysis reactions involve removing or adding which of the following to macromolecule subunits?

C and O

OH and H

CH and NH2

COOH and H

60 / 67

Which of the following copolymers is the copolymer with A and B units arranged in a repeating sequence?

Alternating copolymer

Periodic copolymer

Statistical copolymer

Block copolymer

61 / 67

Macromolecules like Enzymes, vitamins and hormones can be classified into a single category of biological chemicals. Why?

all of these help in regulating metabolism

all of these enhance oxidative metabolism

all of these are conjugated proteins

all of these are exclusively synthesized in the body of a living organism as at present

62 / 67

Homogenous Ziegler Natta coordination polymerization occurs via which mechanism?

Cationic polymerization mechanism

Anionic polymerization mechanism

Mechanism of free-radical polymerization

Cossee?Arlman mechanism

63 / 67

How does the reaction rate vary with increasing extent of reaction beyond 94% conversion in self catalyzed reaction?

remains same

increases

first increases than decreases

decreases

64 / 67

Which of the following olefine undergo coordination polymerisation in the presence of Ziegler-Natta catalysts?

vinyl ethers

vinyl chloride

ethylene

acrylate esters

65 / 67

Cellulose is the most important constituent of plant cell wall. What are its constituents?

unbranched chain of glucose molecules linked by (3-1, 4 glycosidic bond)

branched chain of glucose molecules linked by (3-1, 4 glycosidic bond in straight chain and a-1, 6 glycosidic bond at the site of branching

branched chain of glucose molecules linked by a-1, 6 glycosidic bond at the site of branching

unbranched chain of glucose molecules linked by a-1, 4 glycosidic bond

66 / 67

Which of the following is true about heterogeneous Ziegler Natta polymerisation?

This is based on Kaminsky catalyst

This is based on titanium tetrachloride organo-aluminium co-catalyst

This is based on titanium tetrachloride

This is based on neodymium-based catalyst

67 / 67

Which of the following is an initiator molecule in the free radical polymerisation?

Sulphuric acid

Potassium permanganate

Chromium oxide

Benzoyl peroxide

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