Question

1. An erythrocyte placed into a hypertonic solution will display which of the following effects?

A. flaccidity

B. plasmolysis

C. crenation

D. hemolysis

E. turgidity

2. Benzene (C₆H₆) exhibits which of the following membrane transport movements?

A. it is able to cross the membrane by facilitated diffusion, because it is small, polar, and organic

B. it is able cross the membrane by simple diffusion, because it is small, nonpolar, and organic

C. it is not able to cross the membrane by active transport, because it is big, polar, and inorganic

D. it is able to cross the membrane by active transport, because it is big, nonpolar, and organic

E. it is not able to cross the membrane by passive transport, because it is big, polar, and organic

Answer 1

Ans 1) option C is correct.

Crenation is observed when the cells shrink because the solution of surrounding is in hypertonic condition to the cytoplasm. By the process of osmosis the water will leave from the cell which leads to shrinkage of plasma membrane.

Ans 2) option b is correct

Benzene is highly non polar molecule which is hydrophobic in nature. Benzene can easily be dissolved into the bilayer of lipid. Also, due to its smaller size it can easily pass the membrane by the process of simple diffusion.

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