Which environment(s) do NOT host a microbiome, as far as we know? Choose all that apply.
A. Freshwater
B. Human gut
C. The moon
D. Arctic ice
E. Soil
F. Open ocean
Answer: C
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What is the correct order for the steps in transduction?
A. 1) Phage infects cell 2) Phage transported DNA recombines with chromosome of new cell 3) Host DNA digested into fragments 4) Some phage accidently carry host DNA fragment 5) Phage infects new cell B. 1) Phage infects cell 2) Phage transported DNA recombines with chromosome of new cell 3) Host DNA digested into fragments 4) Phage infects new cell 5) Some phage accidently carry host DNA fragment C. 1) Phage infects cell 2) Host DNA digested into fragments 3) Some phage accidently carry host DNA fragment 4) Phage infects new cell 5) Phage transported DNA recombines with chromosome of new cell D. 1) Phage infects cell 2) Phage transported DNA recombines with chromosome of new cell 3) Some phage accidently carry host DNA fragment 4) Phage infects new cell 5) Host DNA digested into fragments
The release of which of the following neurotransmitters is stimulated by all major addictive drugs?
a. dopamine b. GABA c. serotonin d. acetylcholine
Nutritional mutants in Neurospora can be "cured" by treating the medium with substances in the defective metabolic pathway. What determines whether the mutant strain (auxotroph) is "cured" by a particular substance?
What will be an ideal response?
Complete the equation: monosaccharide + monosaccharide ? ________ + water
A) disaccharide B) polypeptide C) polysaccharide D) fat