In many cells, the adhesion to the extracellular matrix through integrins causes the activation of kinases in the cytoplasm. This suggests that:

A. integrins promote the activation of signaltransduction
pathways.
B. integrins are kinases.
C. extracellular matrix proteins are receptors
and integrins are ligands.


A

Biology & Microbiology

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Dairy cattle were unknown in Thai culture until recently, and 97 percent of Thai people are lactose intolerant as adults. Which explanation for such widespread lactose intolerance is most likely correct?

A) Allergies are becoming more common in humans as more chemicals are being encountered during longer lifetimes. B) Evolutionarily, producing an enzyme to break down a sugar that will never be encountered is wasteful. C) The ability to digest sugar in milk is determined by environment, and most humans are not exposed to milk as a food source beyond childhood years. D) There is no good explanation for this situation in humans.

Biology & Microbiology

. A network of protein filaments called ____ lines and reinforces the inner surface of the nuclear

envelope in animal cells.

a. actins b. chromatins c. lamins d. tubulins e. lamellae

Biology & Microbiology

Which tissue, A, B, C, or D, represents cartilage tissue?

1.A 2.B 3.C 4.D

Biology & Microbiology

________ is a treatment method in which rapidly dividing cells are killed using drugs instead of radiation

Fill in the blank(s) with correct word

Biology & Microbiology