Unlike Sulfolobus, some Archaea use ________ protein(s) to accomplish cytokinesis.
A. CdvA, CdvB, and CdvC
B. FtsZ
C. Seg A and Seg B
D. Tubulin
Answer: B
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Pentameric IgM activates complement up to 20-fold more effectively than does the hexameric form of IgM.
Answer the following statement true (T) or false (F)
Which of the following is FALSE?
a. The outer coats of all viruses have the same protein structure. b. The virus uses either DNA or RNA at its core but not both. c. Viruses can be replicated only after they enter a living cell. d. Most viruses have a protein coat or covering. e. A virus may remain latent for a period of time before causing infection.
People who have type AB blood are considered ________ because they ________
A) universalists : cannot receive blood transfusions B) universal donors : have antibodies to A and B C) universal recipients : have antibodies to A and B D) universal donors : have no antibodies to A and B E) universal recipients : have no antibodies to A or B
The number of people in the general population with type AB blood is relatively small. That is fortunate because these people make the least useful donors. Why are these people not as useful as other blood donors?
What will be an ideal response?