Polymerization and Biomolecules

• Macromolecule described as large molecules built up from small repeating units called as which of the following? a) Biopolymer b) Dimers c) Monomers d) Metamers

• Carbohydrates are polyhydroxy compounds of _______________ a) Glucose b) Oligosaccharides c) Aldehyde and ketone d) Glyceraldehyde

• There are several levels of protein structure, which is the most complex protien? a) Primary b) Secondary c) Tertiary d) Quaternary

• Proteins, which are tremendously complex molecules, what are their basic units or building blocks? a) Carbohydrates b) NH2 c) Polypeptides d) Amino acids

• Amylose is soluble in which of the following solvent? a) Water b) Alcohol c) Partially soluble in alcohol d) Soluble in acidic solution

• Nucleic acids are chains of 5-carbon sugars linked by which type of bonds with an organic base protruding from each sugar? a) Amino b) Phophodiester c) Carbonyl d) Phosphate

• 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? a) Unsaturated fat b) Polysaturated fat c) Polysaccharide d) Saturated fat

• What happens when a macromolecule undergoes hydrolysis reaction? a) protein coils into its secondary structure b) the bond between two subunits of a macromolecule is broken c) a bond is formed between two subunits of a macromolecule d) water breaks ionic bonds

• In the formation of a macromolecule, what type of bond would join two amino acid subunits? a) Ionic bond b) Phosphodiester bond c) Hydrogen bond d) Peptide bond

• Animals store glucose in the form of which macromolecule? a) Amylose b) Glycogen c) Glycerol d) Cellulose

• In the formation of a macromolecule, what type of reaction would join two subunits together? a) Hydrophobic reaction b) Hydrolysis reaction c) Dehydration reaction d) Denaturation reaction

• In which of the following groups are all polysaccharides? a) sucrose, glucose and fructose b) maltose, lactose and fructose c) glycogen, sucrose and maltose d) glycogen, cellulose and starch

• Which of the following is not a disaccharide? a) Sucrose b) Maltose c) Lactose d) Amylose

• What are the most diverse macromolecules in the cell? a) lipids b) mineral salts c) proteins d) carbohydrates

• Amino acids and proteins are ionized at typical biological pH such that both the amino group and the carboxyl group gain hydrogen ions to become -NH3 + and COOH, respectively. a) True b) false

• Dehydration and hydrolysis reactions involve removing or adding which of the following to macromolecule subunits? a) C and O b) OH and H c) CH and NH2 d) COOH and H

• What type of macromolecule carries out catalysis in biological systems? a) proteins called enzymes b) carbohydrates called starches c) lipids called steroids d) nucleic acids called DNA

• Cellulose is the most important constituent of plant cell wall. What are its constituents? a) 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 b) unbranched chain of glucose molecules linked by (3-1, 4 glycosidic bond) c) branched chain of glucose molecules linked by a-1, 6 glycosidic bond at the site of branching d) unbranched chain of glucose molecules linked by a-1, 4 glycosidic bond

• Macromolecules like Enzymes, vitamins and hormones can be classified into a single category of biological chemicals. Why? a) all of these help in regulating metabolism b) all of these are exclusively synthesized in the body of a living organism as at present c) all of these are conjugated proteins d) all of these enhance oxidative metabolism

• Which of the following is an initiator molecule in the free radical polymerisation? a) Benzoyl peroxide b) Sulphuric acid c) Potassium permanganate d) Chromium oxide

• Lipids are insoluble in water because of which of the following reason? a) lipid molecules are hydrophilic b) lipid molecules are hydrophobic c) lipid molecules are neutral d) lipid molecules are zwitterions

• Why is vinyl polymerization also known as addition polymerization? a) monomers are unsaturated compounds b) it is a chain reaction c) most monomers contain (CH2=CH─) group d) it proceeds through radical

• Which of the following happens in propagation step of the free radical polymerisation? a) Decomposition of initiator b) Renewal of inhibitor c) Addition of monomer molecules to the growing chains d) Disproportionation

• Which of the following happens in initiation step of the free radical polymerisation? a) Decomposition of initiator b) Renewal of inhibitor c) Addition of monomer molecules to the growing chains d) Disproportionation