The picture below shows the structure of serotonin. 
a.From which amino acid is serotonin derived?
b.What are the structural differences between serotonin and this amino acid?
c.What is the function of serotonin?
d.Which illness can be caused by reduced levels of serotonin in the brain?
Definitions:
Realized Gain
The profit earned from the sale of an asset when the sale price exceeds the purchase price, which has become actual rather than just theoretical.
Fair Market Values
The estimated price at which a property or asset would trade in a competitive auction setting.
Securities
Financial instruments that represent an ownership position in a publicly-traded corporation (stock), a creditor relationship with a governmental body or a corporation (bond), or rights to ownership as represented by an option.
Bonds Payable
A liability account that records the amounts a company owes to holders of its issued bonds, to be repaid at a specified maturity date.
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