Which of the following statements concerning calmodulin is FALSE?

a. It activates protein kinases.
b. It activates phosphatases.
c. It is a protein.
d. It is found in all eukaryotic cells studied.
e. It binds a maximum of three calcium ions.


E

Biology & Microbiology

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If current changes in ocean temperature and pH caused a mass extinction of today's reefbuilding organisms,

A. we would see an unprecedented mass extinction, unlike anything the earth has experienced in the past. B. we would see one more in a series of mass extinctions that have wiped out reefs at least 3 times since the first reefs appeared over 500 million years ago. C. we would see one more in a series of mass extinctions that have wiped out reefs at regular intervals – roughly every 10 million years since the first reefs were formed over 500 million years ago. D. we would see the second great mass extinction of reefs; the only previous such extinction took place at the end of the Permian. E. none of these

Biology & Microbiology

Cell lineage diagrams are most easily prepared in which model organisms?

A. Drosophila melanogaster B. C. elegans C. Xenopus laevis D. Arabidopsis thaliana

Biology & Microbiology

A carbohydrate consists of

a. amino acid units. b. one or more sugar units. c. lipid droplets. d. glycerol.

Biology & Microbiology

The fruits of which of the following plants are

dispersed by wind? a. maple b. thistle c. dandelion d. cattail e. all of these

Biology & Microbiology