Essential Idea: Living organisms control their composition by a complex web of chemical reactions


1. The synthesis of complex biological molecules from simpler molecules is called ...
  • A. metabolism
  • B. anabolism
  • C. catabolism
  • D. production
2. Which of the following is NOT true?
  • A. Carbon can form ionic bonds
  • B. Carbon can form covalent bonds
  • C. Carbon molecules can be in rings
  • D. Carbon molecules can be in chains

3. The diagrams below show four molecules:

4 x biological molecules

Which of these is a carbohydrate?        

4-5: The following options list four more molecules:

  • A. NH2CHRCOOH   
  • B. Cn(H2O)n-1
  • C. C6H12O6      
  • D. CH3(CH2)nCOOH
4. Which of the above is a fatty acid ?
5. Which of the above is an amino acid?  
6. Which of the following is an organic compound containing sulphur?
  • A. Lipid
  • B. Sugar
  • C. Protein
  • D. Starch
7. Which of the following are catabolic reactions?
  • A. Photosynthesis
  • B. DNA synthesis
  • C. Protein synthesis
  • D. Digestion

8. Which of the following is true for anabolic reactions?

  Require ATP? Type of reaction involved
A. Yes Hydrolysis
B. Yes Condensation
C. No Hydrolysis
D. No Condensation
9. An organic molecule contains carbon, nitrogen, oxygen, hydrogen and phosphorus.

Which group of molecules does it belong to?

  • A. Proteins
  • B. Nucleic Acids
  • C. Lipids
  • D. Carbohydrates.

10. The table shows a chemical group found in certain molecules. Which is incorrect?

  Chemical group Type of molecule
A. carboxyl fatty acid
B. hydroxyl protein
C. amine sugar
D. methyl amino acid