The membrane that surrounds a certain type of living cell has a surface area of 5.0 x 10-9 m2 and a thickness of 2.0 x 10-8 m. assume that the membrane behaves like a parallel plate capacitor and has a dielectric constant of 5.8. (a) the potential on the outer surface of the membrane is +58.5 mv greater than that on the inside surface. how much charge resides on the outer surface? (b) if the charge in part (a) is due to k+ ions (charge +e), how many such ions are present on the outer surface?

What substance has a mass of 9.5g and volume of 2.1cm^3

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.

Increasing the substrate concentration in an enzymatic reaction could overcome which of the following? a) the need for a coenzymeb) allosteric inhibitionc) competitive inhibitiond) insufficient cofactors