Question

Passage of substances through a filter is determined principally by a. size of the particles b....

Passage of substances through a filter is determined principally by

a. size of the particles

b. temperature

c. enzyme activity

d. pH

Proteins such as egg albumin are generally ...

a. too large to diffuse through membranes

b. too small to influence fluid movement

c. small enough to diffuse easily through membranes

d. moving by osmosis

For osmosis to occur, one needs

a. the presence of ATP and a semi permeable cell membrane

b. a semi permeable cell membrane

c. no cell membrane

d. a permeable cell membrane

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Homework Answers

Answer #1

1. Correct answer: a. Passage of substances through a filter is determined principally by size of the particles. The efficiency of a filter is directly related to the particle size of the substance to be filtered. The larger the particle size foe a particluar filter, the higher the efficiency.

2. Correct answer: c. Egg albumin is translucent, soft and liquid-like in nature. It is rich in protein, vitamins and minerals. When egg albumin is added to solution of sodium chloride prepared in cold water with continuous stiring, it dissolves. It is small enough to diffuse easily through membrane.  The size of egg albumin is 47.2 KDa.

3. Correct answer: b. Osmosis is a process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one in order to equalize solute concentration on both sides.

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