Q. Which of the following is present in both prokaryotes and eukaryotes?

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Q. Microtubules, motor proteins, and actin filaments are all part of

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Q. A certain cell organelle which is made of a double phospholipid bilayer that has many large pores in it, is most likely

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Q. Which of the following cell organelles are expected to be associated with motor proteins?

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Q. Eukaryotic cells are more efficient than prokaryotes because their internal compartmentalization

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Q. An organism's first line of defense against attack by an invader such as a virus or bacterium is usually

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Q. The major second messengers are

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Q. The signaling molecules called steroid hormones

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Q. Which of the following is true about a hydrophilic signaling molecule?

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Q. cAMP and cGMP are derived from

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Q. Nitroglycerin has long been administered to human patients suffering from chronic chest pain (angina). This medication works because it

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Q. If a disease of the blood vessels caused the endothelial cells of the vessel to die, what effect would that have on the cellular activities associated with vasodilation?

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Q. In terms of cell communication, what do bacterial pathogens such as cholera and anthrax have in common?

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Q. What is the name of the protein signaling molecule that alters glucose uptake, and where would its receptors be located?

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Q. In the signal transduction mechanism known as protein phosphorylation

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Q. Cell signaling can be classified into

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Q. Which of the following statement is correct?

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Q. In vasodilation, proper nerve signals sent to blood vessels cause

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Q. A cell is known to respond to a particular signaling molecule. Which of the following must be true of this cell?

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Q. The enzyme that catalyzes the splitting of PIP2 into two molecules of inositol triphosphate (IP3) and diacylglycerol in cell signaling, is

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