Which of the following is true of glycolipids?
A) Glycolipids are usually found on the exterior surface of the plasma membrane.
B) Glycolipids are found in plastids and are used to store energy.
C) Fructose and sucrose are often part of glycolipids.
D) Glycolipids contain steroids.
E) Usually more than 10 sugar units are attached to the glycolipid.
Answer: A
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What accounts for the lysis of a bacterial cell in the presence of a membrane attack complex?
A. loss of cytoplasm due to the presence of large channels in the membrane B. unregulated signaling due to the addition of novel proteins to the cell's membrane C. increased osmosis leading to swelling and rupture of the cell D. apoptosis due to the loss of DNA
The constant region of a heavy chain is indicated by number
a. 1. b. 2. c. 3. d. 4. e. 5.
All EXCEPT which one of the following are
the reasons for the rapid population explosion of humans? a. increases in carrying capacity b. expansion into new habitats c. removal of limiting factors d. reproduction occurring earlier in the life cycle e. none of these
As compared to F-negative cells, F-positive cells are at a disadvantage because
a. they may "waste" conjugation by conjugating with other F-positive cells. b. they have greater susceptibility to phage infection. c. cell division is prolonged. d. the replication process renders them more susceptible to mutation. e. they have a more fragile cell wall.