A same meaning or not problem: OPTIONS:
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- yes
Proteins that form stable complexes with other molecules are often described as receptors , while their binding partners are called ligands .
Proteins that form stable complexes with binding molecules are often referred to as receptors , whereas their other partners are called ligands .
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[A]: no

A same meaning or not problem: OPTIONS:
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The old party leader was his geological mentor , Mike Morton .
The leader of the old party was his geological mentor Mike Morton .
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[A]: yes

A same meaning or not problem: OPTIONS:
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- yes
'' Meriden , Connecticut '' was sold to Burdett Pond von Tennessee on September 15 , 1886 .
'' Tennessee '' was sold to Burdett Pond by Meriden , Connecticut , on September 15 , 1886 .
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[A]: no

A same meaning or not problem: OPTIONS:
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- yes
He meets Kekesfalva 's paralyzed daughter Edith and develops for her subtle affection and deep sympathy .
He meets Kekesfalva 's paralyzed daughter Edith and develops subtle affection and deep compassion for her .
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[A]:
yes