Which of the following binds to enhancers? control elements, activators, transcription factor, inducer, repressor
What will be an ideal response?
activators
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The eukaryotic transcription initiation complex is
_____ transcription of virtually all genes transcribed by RNA pol II requiring the same suite of general factors. _____ responsible for highly regulated transcription levels. _____ only associated with RNA polymerase I. _____ interactive with activators through DNA looping. _____ a basal factor associated with RNA pol II after positioning RNA pol II at the start site.
The leading preventable cause of birth defects is exposure of the fetus to:
A. X-rays. B. cigarette smoke. C. alcohol. D. the herpes virus. E. mercury.
What is the main difference between blood and hemolymph?
A. Blood will transport oxygen and nutrients while hemolymph will only transport oxygen. B. Blood is always contained within the blood vessels while hemolymph fills the body cavity. C. Hemolymph is always contained within the blood vessels while blood fills the body cavity. D. Hemolymph is never carried in blood vessels.
Methyl alcohol, also known as wood alcohol, is a common solvent and paint remover. It is poisonous if accidentally swallowed. The enzyme alcohol dehydrogenase in the liver converts methyl alcohol into formaldehyde, which then gets converted into a toxic
product. Grain alcohol, ethyl alcohol, is also acted upon by alcohol dehydrogenase. One antidote for methyl alcohol poisoning is to make a person drink a lot of ethyl alcohol. This blocks the active site of the enzyme so that it can't bind to and break down the methyl alcohol. In this capacity, the ethyl alcohol is acting as a/an: A) competitive inhibtor. B) precursor. C) coenzyme. D) allosteric regulator.