What is a difference between endocrine and exocrine glands?

a. endocrine glands produce nutrients for cells and exocrine glands absorb minerals for cells.

b. endocrine glands secrete products into ducts and exocrine glands secrete hormones into the bloodstream.

c. endocrine glands absorb minerals for cells and exocrine glands produce nutrients for cells.

d. endocrine glands secrete hormones into the bloodstream and exocrine glands secrete products into ducts.

Keeping in mind the life cycle of bacteriophages, consider the following problem: during the reproductive cycle of a temperate bacteriophage, the viral dna inserts into the bacterial chromosome where the resultant prophage behaves much like a trojan horse. it can remain quiescent, or it can become lytic and initiate a burst of progeny viruses. several operons maintain the prophage state by interacting with a repressor that keeps the lytic cycle in check. insults (ultraviolet light, for example) to the bacterial cell lead to a partial breakdown of the repressor, which in turn causes the production of enzymes involved in the lytic cycle. as stated in this simple form, would you consider this system of regulation to be operating under positive or negative control?

What is the compliment dna strand to the following sequence: ttgactaggcta

Ras is a g-protein that is activated when a growth factor attaches to egfr. its activation results in the replacement of a gdp molecule with a gtp molecule, thus allowing a signal transduction pathway to be activated. considering the signal pathway illustrated on this page, what is one potential outcome of a mutation in the ras gene that leads to ras protein hyperactivity. be specific.