Isotopic labeling of a specific substrate carbon with 13C, which has an extra neutron, is particularly useful for investigating biochemical pathways because
A) the presence of the radioisotope greatly accelerates the pathway, which makes it easier to study.
B) the position of the labeled carbon can be traced through products of the pathway to characterize the pathway reactions.
C) the radioisotope blocks each pathway at a specific step.
D) the radioisotope readily exchanges neutrons so that all neighboring carbons become labeled and easier to detect with NMR.
E) radiolabels generally are easier to track in cells than fluorescent labels.
Answer: B
You might also like to view...
DTC genetic tests (select all correct choices):
A. can be purchased directly by consumers. B. involve the active intervention of medical professionals at each stage of the process, from initial submission of samples to final consultation with the consumer. C. may or may not be reliable. D. are the best way to determine whether or not an individual carries an allele associated with a specific disease. E. none of these
A plant disease called ergot is caused by
A. Coccidioides immitis. B. Histoplasma capsulatum. C. Aspergillus flavus. D. Claviceps purpurea. E. Staphylococcus aureus.
What domain of a transcription factor regulates transcription by interacting with other proteins?
a) DNA-unwinding domain b) DNA-binding domain c) activation domain d) repression domain
A large percentage of the public believes that vaccines play a role in the development of autism. What information would you use to explain to a friend that there is no scientific evidence to suggest that vaccines cause autism? What resources might you
use to support your explanation? What will be an ideal response?