Peroxisomes and the smooth endoplasmic reticulum are both associated with detoxification of harmful substances. How do these two organelles differ with regard to this process?
What will be an ideal response?
Answer: sER: Enzyme-catalyzed hydroxylation makes toxic hydrophobic substances more water soluble for elimination from the body. This can induce drug tolerance, because increasingly higher doses of the drug are necessary to achieve the same sedative effect. During the process, drug metabolites can be more toxic than the original substance or may induce drug tolerance.
Peroxisomes: Enzymes including peroxidases oxidatively detoxify some toxic compounds by using them as electron donors to detoxify H2O2 and other toxic reactive oxygen compounds.
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Studies assessing the amounts of different carbon isotopes (12C, 13C, and 14C) in the atmosphere were important because they provided evidence that human activities were in fact adding CO2 to the atmosphere. This is an example of what type of relationship
A. correlation B. symbioses C. causation D. conduction E. antagonism
Which of the following does not contribute to the efficiency with which E. coli RNA polymerase binds to a promoter?
A. the sequence of the upstream promoter element B. the binding of a sigma subunit C. the sequence at the +10 region D. the sequence at the -35 region E. the distance between the consensus sequence and the transcriptional start site
Under what condition might a human female have the XY sex chromosome complement?
What will be an ideal response?
Which of the following groups has the most species?
A) kingdom B) order C) phylum D) domain