Polymerisation & Biomolecules topics include: Macromolecules, radical vinyl polymerisation, copolymerisation, coordination and step reaction polymerisation, amino acids, DNA and RNA. Polymerization is a central operation in biology that connects molecular signals with events in cells. It's a process where monomers join together to form polymers.  Biomolecules are organic molecules that are important for the maintenance and metabolic functions of living organisms. Polymers, also known as macromolecules, are large molecules made up of many subunits.  Here are some examples of... Show more

Polymerisation & Biomolecules topics include: Macromolecules, radical vinyl polymerisation, copolymerisation, coordination and step reaction polymerisation, amino acids, DNA and RNA.

Polymerization is a central operation in biology that connects molecular signals with events in cells. It's a process where monomers join together to form polymers. 

Biomolecules are organic molecules that are important for the maintenance and metabolic functions of living organisms. Polymers, also known as macromolecules, are large molecules made up of many subunits. 

Here are some examples of biomacromolecules that are synthesized through polymerization: RNA, DNA, Polysaccharides, Proteins. 

In dehydration synthesis, monomers are linked together through a chemical reaction that involves water. Bonds are formed between monomers while losing water molecules. 
Polymers are disassembled through a process called hydrolysis, which is another chemical reaction that involves water.

Show less

Organic Chemistry Practice Test: Polymerisation & Biomolecules

Time left 00:00

25 Questions

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

PhophodiesterCarbonylAminoPhosphate

2. A primary amine can be converted to an alcohol by the action of which of the following?

AlkaliOxidizing agentReducing agentNitrous acid

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

unbranched chain of glucose molecules linked by a-1, 4 glycosidic bondbranched chain of glucose molecules linked by a-1, 6 glycosidic bond at the site of branchingbranched chain of glucose molecules linked by (3-1, 4 glycosidic bond in straight chain and a-1, 6 glycosidic bond at the site of branchingunbranched chain of glucose molecules linked by (3-1, 4 glycosidic bond)

4. What are the most diverse macromolecules in the cell?

carbohydratesproteinslipidsmineral salts

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

Initiator are required for the step growth polymerisationRapid loss of monomer early in the reactionSimilar steps repeated throughout reaction processMolar mass of backbone chain increases rapidly at early stage and remains approximately the same throughout the polymerization

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

phenol and formaldehydeisocyanate and alcoholester and phenoldiamine and formaldehyde

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

Alternating copolymerPeriodic copolymerStatistical copolymerBlock copolymer

8. p-chloro aniline and anilinium hydrogen chloride can be distinguished by which of the following?

Carbyl amine reactionAgNO3Sandmaeyer reactionHinsberg’s reaction

9. Nitration of aniline also gives m-nitro aniline, in strong acidic medium because of which of the following reasons?

Inspite of substituents nitro group always goes to m- positionIn strong acidic medium aniline present as anilinium ionIn strong acidic medium, nitration of aniline is a nucleophic substitution reactionIn electrophilic substitution reaction amino group is meta directive

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

This is based on neodymium-based catalystThis is based on Kaminsky catalystThis is based on titanium tetrachlorideThis is based on titanium tetrachloride organo-aluminium co-catalyst

11. DNA is composed of repeating units of ___________

ribonucleotidesribonucleosidesdeoxyribonucleotidesdeoxyribonucleosides

12. The reductive amination of an aldehyde (e.g. the reaction of propanal with ethylamine) can be carried out in the laboratory using which of the following as a reducing agent?

NaBH3CNLiAlH4NaBH4BH3

13. Why is vinyl polymerization also known as addition polymerization?

it proceeds through radicalit is a chain reactionmonomers are unsaturated compoundsmost monomers contain (CH2=CH─) group

14. Electrophilic substitution of aniline with bromine in presence of gacial acetic acid gives which of the following?

3-bromo aniline1, 4, 6-tribromo aniline4-bromo aniline2, 4, 6-tribromo aniline

15. Animals store glucose in the form of which macromolecule?

AmyloseGlycogenCelluloseGlycerol

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

HClBF3PeroxidesHydroxide ion

17. Which polymer will be formed when vinyl acetate reacts with peroxides?

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

Chromium oxidePotassium permanganateBenzoyl peroxideSulphuric acid

19. Which catalyst is used for the coordination polymerisation of polybutadiene?

kaminsky catalysttitanium tetrachloride organo-aluminium co-catalystneodymium-based catalystorgano-aluminium co-catalyst

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

AtacticEnatiometricIsotacticSyndiotactic

21. An organic amino compound reacts with aqueous nitrous acid at low temperature to produce an oily nitroso amine. What is this compound?

(CH3CH2)3CH3NH2CH3CH2NH.CH2CH3CH3CH2NH2

22. A nucleotide is formed of which of the following units?

nitrogen base, sugar and phosphatenitrogen base and phosphatesugar and phosphatenitrogen base and sugar

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

Graft copolymerStar copolymerTerepolymer copolymerStatistical copolymer

24. Which of the following is not a disaccharide?

MaltoseAmyloseSucroseLactose

25. Homogenous Ziegler Natta coordination polymerization occurs via which mechanism?

Mechanism of free-radical polymerizationCossee–Arlman mechanismCationic polymerization mechanismAnionic polymerization mechanism