Temperate viruses can enter into either a lytic or lysogenic cycle
Indicate whether the statement is true or false.
Answer: TRUE
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As you recall, a single enzyme molecule may catalyze a reaction many times. In signal transduction
pathways, which may utilize several enzymes, the result is _________.
a. amplification of the final product b. denaturation of non-essential proteins c. hydrolysis of signal molecules d. transformational modification of the receptor e. change in cell membrane permeability
Even though a hydra only has a nerve net, not a central nervous system, it still has
A. synapses. B. gray matter. C. white matter. D. an autonomic nervous system. E. the same neurotransmitters as humans.
AIDS is short for
a. Acquired Immune Deficiency Syndrome. b. Accelerated Immune Death Syndrome. c. Accentuated Induced Deficiency Syndrome. d. Advantageous Immunity Deficiency Syndrome. e. none of these.
There was a mass extinction of plants and animals at the end of the Permian period. Which of the following would be a reasonable prediction for the fungal fossil record?
A. There should be a massive increase in saprophytic fossils during the extinction, and then a massive decline shortly after the extinction was complete. B. There should be a slow increase in all fungal fossils during the time that plant and animal species declined, with their numbers staying relatively high afterward since there was little competition from other species. C. There should be a massive decrease in all fungal fossilsat the same time that plant and animal species started to decline, and the number of these fossils should remain low throughout the extinction period D. There should be a massive increase in mycorrhizal fossils during the extinction and afterward.