The ability to acquire, store, transfer, or utilize energy is called:
a. biochemistry.
b. photosynthesis.
c. metabolism.
d. respiration
Answer: c. metabolism.
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Proteins that recognize unfolded polypeptides and help them fold into their proper conformations are called ________.
Fill in the blank(s) with the appropriate word(s).
Tetherin is an important protein produced by the host. What is the function of tetherin in protecting a host cell from HIV?
A) ties maturing virions to the membrane of the host cell, thereby preventing the release of the mature virus B) binds the virus to the external host cell membrane, thereby preventing the virus from entering the host cell C) binds the viral RNA to reverse transcriptase, thus preventing synthesis of the viral DNA D) binds the two viral RNA strands together, thus preventing the transcription of viral DNA in the host cell E) causes the maturing virions to aggregate together, thus preventing their release from the host cell
While examining a rock surface, you have discovered an interesting new organism. Which of the following criteria will allow you to classify the organism as belonging to Bacteria but not Archaea or Eukarya?
A) Cell walls are made primarily of peptidoglycan. B) The organism does not have nucleus. C) The lipids in its plasma membrane consist of glycerol bonded to straight-chain fatty acids. D) It can survive at a temperature over 100°C.
The process by which mitochondria are thought to have arisen during evolution is called
a. symbiosis. b. phagocytosis. c. endosymbiosis. d. autophagocytosis