Which type of protein is used by cells of the immune system to distinguish normal cells from foreign or infected cells?
A. Anchoring proteins
B. Ligands
C. Cell adhesion proteins
D. Identity markers
E. Transport proteins
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Question 2) Proteins that assist the movement of a substance across the membrane are called _________ proteins.
A. catalytic
B. cytoskeleton
C. transport
D. identification
E. intercellular attachment
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Question 3) Proteins that are embedded within, and extend across, the phospholipid bilayer are called _____ proteins.
A. catalytic
B. integral
C. cytoskeleton
D. peripheral
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Question 4) Some membrane proteins are not embedded within the lipid bilayer but are instead anchored loosely to either the inner or the outer surface. Such proteins are called _________ proteins.
Fill in the blank with correct word.
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Question 5) Glycolipids are found on the
A. outer layer of the cell membrane, and they help make the sticky sugar coating on its surface.
B. middle layer of the cell membrane, and they function to transmit solutes through the membrane.
C. inner layer of the cell membrane, and they provide scaffold support to the cell membrane.
D.
inside of the cell, where they are a source of high-energy nutrition to power mitochondria.
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Question 6) The most abundant lipid of the membrane consists of a head and two tails. This type of lipid is
A. a phospholipid.
B. cholesterol.
C. glycolipid.
D. glycoprotein.
E. a steroid.
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Question 7) Over time diffusion results in the even distribution of a substance throughout an area.
Indicate whether this statement is true or false.
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Question 8) The lipid that stabilizes the membrane at extreme temperatures and is found in the hydrophobic regions of the bilayer is
A. the polar head.
B. the nonpolar tails.
C. cholesterol.
D. glycolipid.
E. glycocalyx.
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Question 9) Which of the following choices describes three general functions cells must perform?
A. Maintain shape, obtain nutrients, and dispose of wastes
B. Respond to all hormones, maintain a waterproof barrier, give rise to gametes
C. Grow until dividing, store complex carbohydrates, generate antibodies
D. Take up oxygen, prevent water entry, undergo mitosis frequently
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Question 10) All cells must obtain nutrients, form new chemical structures, and dispose of waste molecules.
Indicate whether this statement is true or false.
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