Dopamine is a neurotransmitter—a chemical released by nerve cells to send signals to other nerve cells. Activities like sex and gambling increase the levels of dopamine released within the brain. The highly addictive drugs cocaine and methamphetamine mimic the effects of dopamine. Loss of dopamine releasing cells in parts of the brain can lead to Parkinson’s disease, a condition characterized by tremors and motor impairment.

Question

(A) The Dopamine molecule is capable of making strong hydrogen bonds. Edit the dopamine molecule so it can no longer make strong hydrogen bonds.

(B) The Dopamine molecule cannot make ionic bonds. Edit the dopamine molecule so it now can make ionic bonds.

(C) The dopamine molecule has an intermediate hydrophobicity. Edit the dopamine molecule so that it is more hydrophobic.

Answer 1

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Answer 2

For (A) substitute the hydroxyl-groups with H and the amino-group with a methyl-group

For (C) substitute the hydroxyl-groups with chloride

For (D) Chloride