The phospholipid bilayer is _ between the two layers, and _ on the outside of th

Question

The phospholipid bilayer is _ between the two layers, and _ on the outside of the membrane. a. Hydrophilic; hydrophobic b. Ionic; hydrophilic c. Fatty; hydrophobic d. Hydrophobic; hydrophilic It a red blood cell was placed in a hypotonic solution, water would move _ the cell. The would cause the cell to _. a. Into; maintain normal volume b. Out of; shrink c. Into; lyse d. Out of; lyse Countercurrent exchange is used in a number of systems. Which best explains why? a. It is not efficient, but it is simple. b. It creates a constant gradient for exchange resulting in efficiency of exchange. c. It allows for exchange of gasses only. d. It allows for exchange of ions only. e. It allows for exchange of water only. During the light independent reactions, _ is bound to produce a three carbon molecule called PGA. a. CO_2; Rubisco b. CO_2; RuBP c. O_2; Rubisco d. O_2; RuBP

Explanation / Answer

(36)

D. hydrophobic; hydrophilic

Long fatty acid chains of phospholipids in the lipid bilayer bring about hydrophobic nature to the interior of the membrane. While the exterior is hydrophilic with polar groups.

(37)c. Into; lyse

Water from the hypotonic solution moves into hypertonic solution separated by a semipermeable membrane.

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