In the formation of biofilms, such as those forming on unbrushed teeth, cell signaling serves which function?

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#Question id: 2254

#Unit 2. Cellular Organization

If the intracellular [Ca2+] is 10⁻⁷ mol/L and the extracellular [Ca2+] is 2 × 10⁻³ mol/L, at what potential difference across the cell membrane will Ca2+ be at electrochemical equilibrium?

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#Question id: 2255

#Unit 2. Cellular Organization

Following statements are regarding to the Na+/K+ ATPase maintains the intracellular Na+ and K+ concentrations in animal cells. Which of the following statement is incorrect?

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#Question id: 2256

#Unit 2. Cellular Organization

Match the following inhibitors (Column I) with their effect (Column II).

Column I	Column II
A. A23187	I. endoplasmic reticulum Ca2+ ATPase inhibitor
B. valinomycin	II. Na+/K+ ATPase inhibitor
C. thapsigargin	III. K+ ionophore
D. ouabain	IV. Ca2+ ionophore

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#Question id: 2257

#Unit 2. Cellular Organization

Match the following property (Column I) with the transport mechanism (Column II).

Column I	Column II
A. Facilitated Transport	i. Requires specific protein
B. Active Transport	ii. Solute transported against its gradient
C. Cotransport	iii. Coupled to ATP hydrolysis
	iv. Driven by movement of a cotransported ion down its gradient

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#Question id: 10530

#Unit 2. Cellular Organization

The transfer of a lipid molecule across a bilayer, a process termed:

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#Question id: 10531

#Unit 2. Cellular Organization

Flippases catalyze translocation of the aminophospholipids: