Polymerisation & Biomolecules Quiz 1

1 / 67

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

Hemoglobin

Collagen

Insulin

Myoglobin

2 / 67

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

lipid molecules are zwitterions

lipid molecules are hydrophobic

lipid molecules are hydrophilic

lipid molecules are neutral

3 / 67

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

Syndiotactic

Enatiometric

Isotactic

Atactic

4 / 67

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

adenine

guanine

cytosine

thymine

5 / 67

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

replication

translation

transcription

reproduction

6 / 67

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

Star copolymer

Terepolymer copolymer

Graft copolymer

Statistical copolymer

7 / 67

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

Phosphate

Amino

Phophodiester

Carbonyl

8 / 67

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

Methionine

Leucine

Glutamine

Lysine

9 / 67

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

isocyanate and alcohol

phenol and formaldehyde

ester and phenol

diamine and formaldehyde

10 / 67

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

Dehydration reaction

Hydrophobic reaction

Denaturation reaction

Hydrolysis reaction

11 / 67

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

Periodic copolymer

Statistical copolymer

Block copolymer

Alternating copolymer

12 / 67

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

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

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

13 / 67

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

Potassium permanganate

Chromium oxide

Benzoyl peroxide

Sulphuric acid

14 / 67

Which catalyst is commonly used in coordination chain polymerization?

ziegler- Natta catalyst

platinum

nickel

zeolite

15 / 67

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

This is based on neodymium-based catalyst

This is based on organoaluminium co-catalyst

This is based on titanium tetrachloride organoaluminium co-catalyst

This is based on Kaminsky catalyst

16 / 67

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

Initiator are required for the step growth polymerisation

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

Similar steps repeated throughout reaction process

Rapid loss of monomer early in the reaction

17 / 67

What are the most diverse macromolecules in the cell?

carbohydrates

proteins

lipids

mineral salts

18 / 67

Animals store glucose in the form of which macromolecule?

Glycogen

Glycerol

Amylose

Cellulose

19 / 67

Which of the characteristics below apply to amino acid Glycine?

Hydrophilic, basic and charged

Hydrophobic

Hydrophilic, acidic and charged

Optically inactive

20 / 67

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

decomposition of initiator

disproportionation

addition of monomer molecules to the growing chains

addition of free radical to monomer

21 / 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

22 / 67

Which catalyst is used for the coordination polymerisation of polybutadiene?

organo-aluminium co-catalyst

neodymium-based catalyst

titanium tetrachloride organo-aluminium co-catalyst

kaminsky catalyst

23 / 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)

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

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

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

24 / 67

Amylose is soluble in which of the following solvent?

Alcohol

Water

Partially soluble in alcohol

Soluble in acidic solution

25 / 67

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

adenine

thymine

guanine

cytosine

26 / 67

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

transcription

reproduction

translation

replication

27 / 67

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

Peroxides

HCl

BF3

Hydroxide ion

28 / 67

Carbohydrates are polyhydroxy compounds of _______________

Glucose

Glyceraldehyde

Aldehyde and ketone

Oligosaccharides

29 / 67

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

Star copolymer

Graft copolymer

Terepolymer copolymer

Statistical copolymer

30 / 67

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

coiled around a common axis

coiled over protein sheath

coiled around each other

coiled differently

31 / 67

What type of macromolecule carries out catalysis in biological systems?

nucleic acids called DNA

carbohydrates called starches

lipids called steroids

proteins called enzymes

32 / 67

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

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

This is based on Kaminsky catalyst

This is based on titanium tetrachloride

This is based on neodymium-based catalyst

33 / 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 alkane and azide functional group

Compound which bears both vinyl and azide functional group

Compound which bears both alkyne and azide functional group

34 / 67

Which of the following is not a disaccharide?

Sucrose

Maltose

Amylose

Lactose

35 / 67

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

vinyl chloride

acrylate esters

ethylene

vinyl ethers

36 / 67

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

Addition of monomer molecules to the growing chains

Decomposition of initiator

Renewal of inhibitor

Disproportionation

37 / 67

A nucleoside is formed of which of the following units?

nitrogen base and sugar

nitrogen base and phosphate

nitrogen base, sugar and phosphate

sugar and phosphate

38 / 67

DNA is composed of repeating units of ___________

ribonucleotides

deoxyribonucleosides

deoxyribonucleotides

ribonucleosides

39 / 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?

Polysaccharide

Saturated fat

Polysaturated fat

Unsaturated fat

40 / 67

Which of the following statements about amino acids is correct?

Twenty four amino acids are commonly used in protein synthesis

Amino acids in proteins are mainly in the D-configuration

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

Amino acids are uncharged at neutral pH

41 / 67

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

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

Ultrahigh molecular weight Polyethylene (UHMWPE)

High density Polyethylene (HDPE)

Polyvinyl acetate (PVAc)

42 / 67

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

Disproportionation

Decomposition of initiator

Addition of monomer molecules to the growing chains

Renewal of inhibitor

43 / 67

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

Decreases an increases

Remains same

Increase then decrease

Can?t say about molecular weight

44 / 67

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

Periodic copolymer

Alternating copolymer

Block copolymer

Statistical copolymer

45 / 67

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

Polyester

Polyurethane

Polysiloxane

Polyamide

46 / 67

In which of the following groups are all polysaccharides?

maltose, lactose and fructose

glycogen, cellulose and starch

sucrose, glucose and fructose

glycogen, sucrose and maltose

47 / 67

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

Free-radical polymerization

Anionic vinyl polymerization

Metathesis polymerization

Ziegler-Natta polymerization

48 / 67

Homogenous Ziegler Natta coordination polymerization occurs via which mechanism?

Mechanism of free-radical polymerization

Cationic polymerization mechanism

Anionic polymerization mechanism

Cossee?Arlman mechanism

49 / 67

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

Statistical copolymer

Alternating copolymer

Block copolymer

Periodic copolymer

50 / 67

Which of the following is the condition for ideal copolymerization?

r1=r2

r1r2=0

r1=1

r1r2=1

51 / 67

A nucleotide is formed of which of the following units?

sugar and phosphate

nitrogen base and sugar

nitrogen base, sugar and phosphate

nitrogen base and phosphate

52 / 67

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

Block copolymer

Periodic copolymer

Statistical copolymer

Alternating copolymer

53 / 67

Which of the following is true about copolymerisation?

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

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

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

54 / 67

Which amino acid can form disulphide bonds?

Leucine

Cysteine

Proline

Valine

55 / 67

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

Metamers

Biopolymer

Dimers

Monomers

56 / 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 exclusively synthesized in the body of a living organism as at present

all of these are conjugated proteins

57 / 67

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

Leucine

Proline

Valine

Glycine

58 / 67

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

remains same

decreases

increases

first increases than decreases

59 / 67

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

Quaternary

Secondary

Tertiary

Primary

60 / 67

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

Amino acids

Carbohydrates

Polypeptides

NH2

61 / 67

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

Peptide bond

Phosphodiester bond

Hydrogen bond

Ionic bond

62 / 67

Why is vinyl polymerization also known as addition polymerization?

it proceeds through radical

most monomers contain (CH2=CH?) group

it is a chain reaction

monomers are unsaturated compounds

63 / 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?

Terepolymer copolymer

Statistical copolymer

Graft copolymer

Star copolymer

64 / 67

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

serine

cysteine

tyrosine

phenylalanine

65 / 67

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

C and O

COOH and H

OH and H

CH and NH2

66 / 67

Which of the following is true about coordination polymerisation?

polymerization that is catalysed by transition metal salts and complexes

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

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

67 / 67

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

thymine

cytosine

guanine

adenine

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