11.3 QCE Chemistry Proteins Quiz

What are the secondary structures of proteins?

• α-helix and β-pleated sheets

• Double helix and triple helix

• Linear chain and branched chain

• Spherical and cylindrical

Which of the following statements is true about enzymes?

• Enzymes are proteins and their activity depends on their structure and specificity.

• Enzymes are carbohydrates and their activity is independent of their structure.

• Enzymes are lipids and they do not act as biological catalysts.

• Enzymes are nucleic acids and their activity is random.

What are organic macromolecules typically formed through?

• Hydrolysis reactions

• Condensation reactions

• Oxidation reactions

• Reduction reactions

Which of the following is NOT an example of a carbohydrate?

• Glucose

• Sucrose

• Chitin

• Keratin

What are the building blocks of proteins?

• Monosaccharides

• Fatty acids and glycerol

• Amino acids

• Nucleotides

What is produced as a byproduct in a condensation reaction?

• Oxygen

• Carbon dioxide

• Water

• Methane

What forms between a molecule of glycerol and three fatty acids?

• Polysaccharides

• Proteins

• Triglycerides

• Nucleic acids

What is removed during the formation of a longer polymer from a short polymer and an unlinked monomer?

• CO2

• H2O

• O2

• H2

Proteins are organic compounds composed of which elements?

• C, H, O, N

• C, H, O, P

• C, H, O, S

• C, H, O, Cl

What are proteins composed of many amino acids combined together known as?

• Polysaccharides

• Polyamides

• Polyketides

• Polyesters