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6. What molecule is eliminated when deoxyribose joins with phosphate?

  • O2
  • N2
  • H2O
  • CO2

7. What shape is DNA?

  • loop
  • double helix
  • single, straight strand
  • tube

8. What are proteins?

  • 3 bases
  • Condensation polymers of amino acids
  • a base, phosphate and sugar

9. What can a hydrogen bond form between?

  • between H and O or N
  • between H and Na
  • between two H atoms
  • between H and C

10. What bonds can you find in a tertiary protein?

  • Van der Waals forces
  • covalent bonds
  • hydrogen, peptide, instaneous dipole induced dipole and di sulfide bridges
  • only peptide bonds

11. What gives an amino acid basic qualities?

  • amino group
  • hydrogen atoms
  • carboxyllic acid
  • the central carbon atom

12. What can zwitterions exist?

  • In acidic conditions
  • Everywhere
  • At an amino acids isoelectric point
  • In enzymes

13. What happens if the temperature gets too high for an enzyme?

  • Nothing
  • It sweats
  • It denatures
  • It burns