You label cells with a radioactive isotope of sulfur (35S). The only molecules that would be radioactively labeled in these cells are
A. proteins
B. nucleic acids
C. lipids
D. carbohydrates
Answer: A
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You have designed a drug able to transform skin cells into cells that secrete insulin. What accumulative aspect of the cell will the drug affect?
A. Phenotypic traits. B. Epigenetics. C. The proteome. D. Transcriptional factors.
Saltatory ("jumping") conduction
a. occurs only in the central nervous system. b. is a quicker type of nerve conduction. c. occurs between nerves and muscles. d. involves the movement of impulses from node to node. e. involves both a quicker type of nerve conduction and the movement of impulses from node to node.
All of the following are ways that prokaryotes can exchange genetic material except
A. conjugation. B. exchange of R plasmids. C. transduction. D. vertical gene transfer. E. transformation.
If a species showed no senescence, could there be immortal organisms in nature? Limit your answer to one to two sentences
What will be an ideal response?