BSC 2010 FSU Dennis Exam 2 Questions and Correct Answers/ Latest Update / Already Graded

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BSC 2010 FSU Dennis Exam 2 Questions
and Correct Answers/ Latest Update /
Already Graded
Temperature, membrane composition

Ans: membrane fluidity is influenced by ______________ and
_____________ ____________.


Plasma Membrane

Ans: The _________ _______________ is the boundary that
separates the living cell from its surroundings.


Selective Permiability

Ans: The plasma membrane exhibits __________
_______________, allowing some substances to cross it more
easily than others.


Living cell, surroundings

Ans: The plasma membrane is the boundary that separates the
____________ ________ from its ___________.


Amphipathic Molecules

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Ans: Phospholipids are ____________ ______________,
containing hydrophobic and hydrophilic regions


Phospholipids

Ans: _________________ are amphipathic molecules,
containing hydrophobic and hydrophilic regions


Hugh Davson, James Danielli

Ans: In 1935, _______ _________ and _________ ___________
proposed a sandwich model in which the phospholipid bilayer
lies between two layers of globular proteins


Sandwich Model

Ans: In 1935, Hugh Davson and James Danielli proposed a
_____________ ___________ in which the phospholipid bilayer
lies between two layers of globular proteins


Fluid Mosaic Model

Ans: Freeze-fracture studies of the plasma membrane
supported the ___________ ___________ __________.




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Freeze-fracture

Ans: ___________ ___________ is a specialized preparation
technique that splits a membrane along the middle of the
phospholipid bilayer


Fluid State, Solid State

Ans: As temperatures cool, membranes switch from a _______
_________ to a __________ __________.


Unsaturated fatty acids, saturated fatty acids

Ans: Membranes rich in ______________ ________ ________
are more fluid than those rich in _______________ _______
______.


Fluid

Ans: Membranes must be ________ to work properly


Steroid cholesterol

Ans: The _________ ____________ has different effects on
membrane fluidity at different temperatures




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Warm

Ans: At _________ temperatures, cholesterol restrains
movement of phospholipids


cool

Ans: At ________ temperatures, it maintains fluidity by
preventing tight packing


Membrane

Ans: A ______________ is a collage of different proteins
embedded in the fluid matrix of the lipid bilayer


Proteins

Ans: _________ determine most of the membrane's specific
functions


Peripheral proteins

Ans: __________ ___________ are bound to the surface of the
membrane


Transmembrane proteins

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