Isomers

Part A

L-dopa is used to treat _____.

	muscle sprains
	laryngitis
	Marfan's syndrome
	Parkinson's disease
	Alzheimer's disease

Correct

People with Parkinson's disease lack dopamine.

Part B

What kind of effect does R-dopa have on Parkinson's disease?

	It alleviates the symptoms.
	It makes the symptoms of Parkinson's disease worse.
	At first it makes the symptoms worse but over the long term it alleviates the symptoms.
	None.
	At first it alleviates the symptoms but over the long term it makes the symptoms worse.

Correct

R-dopa has no effect on Parkinson's disease.

Part C

These molecules are _____.

	enantiomers
	amines
	thiols
	structural isomers
	geometric isomers

Correct

The two molecules differ in the covalent bond relationships among their atoms.

Part D

These molecules are _____.

	ATP and ADP
	structural isomers
	enantiomers
	thiols
	geometric isomers

Correct

These molecules differ in how their atoms are arranged about a double bond.

Part E

These molecules are _____.

	structural isomers
	enantiomers
	geometric isomers
	thiols
	R-dopa and L-dopa

Correct

These molecules are mirror images.

Part F

Enantiomers are molecules that _____.

	contain an –OH group
	differ in the arrangement of their molecules about a double bond
	are isomers that differ in the covalent partnerships between their atoms
	are mirror images
	contain a carboxyl group

Correct

This is the definition of enantiomers.

Part G

Geometric isomers are molecules that _____.

	differ in their molecular formulas
	are mirror images
	are isomers that differ in the covalent partnerships between their atoms
	differ in the arrangement of their atoms about a double bond
	are isomers in which one of the molecules contains an amino group and the other contains a phosphate group

Correct

This is the definition of geometric isomers.

Part H

This pair of molecules are _____.

	not isomers
	identical
	structural isomers
	geometric isomers
	enantiomers

Correct

These molecules have different molecular formulas.