An agent that would work well as an antibiotic against prokaryotic infection might target
A) the 50S large ribosomal subunit.
B) RNA polymerase II.
C) the 40S small ribosomal subunit.
D) DNA polymerase.
E) mitochondria.
Answer: A
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The most critical difference between global nucleotide excision repair (NER) and transcription-coupled repair (TCR) is:
A. the initiation step; in NER the XPC protein recognizes the damage but in TCR it is the RNA polymerase that recognizes the damage. B. the excision step; NER uses UvrC (exinuclease) to nick the DNA but TCR uses the AP endonuclease. C. the removal step; NER uses UvrD (helicase) to unwind and release the damaged strand but in TCR the damaged strand is degraded by Pol I. D. the final step; NER uses Pol I and ligase to fill the gap but TCR uses Pol III and ligase. E. None of the choices given is correct.
The debate over nature vs. nurture in determining certain human characteristics can be explained by pleiotropic genes. Indicate whether the statement is true or false
What is heterozygote advantage? Provide one example of this and briefly explai What will be an ideal response?
Which of the following is a difference between how a frog and chytridiomycetes obtain energy?
A. Frogs ingest their food; chytridiomycetes secrete digestive enzymes. B. Chytridiomycetes ingest their food; frogs secrete digestive enzymes. C. Frogs are heterotrophs; chytridiomycetes are phototrophs. D. Chytridiomycetes are heterotrophs; frogs are phototrophs. E. Frogs are autotrophs; chytridiomycetes are phototrophs.