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Membrane Structure and Function

Membrane Structure and Function
The movement of molecules across a membrane by passive transport does not require

internal energy
vibrational energy
none of these
an input of metabolic energy

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Membrane Structure and Function
Which type of molecule spans the membrane, from its inner to outer surface according to the Fluid mosaic model of cell membranes?

Phospholipid
Cholesterol
Protein
Carbohydrate

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Membrane Structure and Function
The model that is now known to be correct for the structure of biological membrane is

Lock and Key model
Lac Operon model
Page's model
Fluid mosaic model

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Membrane Structure and Function
The plasma membrane is a selectively permeable barrier due to presence of specific transport

none of these
proteins
amino acids
carbohydrates

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Membrane Structure and Function
The mesosomes may be the sites of

DNA replication and specialized enzymatic reactions
RNA replications and specialized enzymatic reactions
RNA replications and specialized cyclic reactions
None of these

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Membrane Structure and Function
Membrane lipids are

hydrophilic
ampiphillic
none of these
hydrophobic

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